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University of Illinois – Urbana-Champaign
1.
Lu, Chien-Yao.
Metal-cavity surface-emitting nanolasers.
Degree: PhD, 1200, 2012, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/32042 
► Metal-cavity surface-emitting micro/nanolasers are proposed and demonstrated. The design uses metals as both the cavity sidewall and the top/bottom reflectors and maintains the surface-emitting nature.…
(more)
▼ Metal-
cavity surface-
emitting micro/nanolasers are proposed and demonstrated. The design uses metals as both the
cavity sidewall and the top/bottom reflectors and maintains the
surface-
emitting nature. As a result of the large permittivity contrast between the dielectric and metal, the optical energy can be well-confined inside the metal nanocavity. Flip-bonding the device to a silicon substrate with a conductive metal provides efficient heat removal. Several excellent performance characteristics have been observed such as ultra-narrow linewidth, low thermal impedance, and circular beam shapes. The devices proposed and realized are substrate-free with transferability to other platforms. The size of the proposed structure can be further reduced without severe degradation in the performance. This work provides a detailed theoretical model starting from the waveguide analysis to full structure simulations by taking into account both the geometry and the metal dispersion. Several substrate-free metal-
cavity surface emitters are demonstrated. Advanced metal-
cavity surface-
emitting microlasers with submonolayer quantum dots are used as the active medium. Fabrication and experimental data are reported for electrical injection metal-
cavity quantum-dot
surface-
emitting microlasers at room temperature. Detailed studies are conducted of size-dependent
cavity modes for future size reduction. This thesis presents the accomplishment of the first room temperature metal-
cavity surface-
emitting microlaser with the best performance among the existing metal-
cavity lasers. A further size reduction strategy for future work will be discussed and analyzed theoretically.
Advisors/Committee Members: Chuang, Shun-Lien (advisor), Chuang, Shun-Lien (Committee Chair), Eckstein, James N. (committee member), Goddard, Lynford L. (committee member), Leburton, Jean-Pierre (committee member).
Subjects/Keywords: metal-cavity; Vertical-cavity surface-emitting lasers (VCSEL); semiconductor laser
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APA (6th Edition):
Lu, C. (2012). Metal-cavity surface-emitting nanolasers. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/32042
Chicago Manual of Style (16th Edition):
Lu, Chien-Yao. “Metal-cavity surface-emitting nanolasers.” 2012. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/32042.
MLA Handbook (7th Edition):
Lu, Chien-Yao. “Metal-cavity surface-emitting nanolasers.” 2012. Web. 13 Apr 2021.
Vancouver:
Lu C. Metal-cavity surface-emitting nanolasers. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2012. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/32042.
Council of Science Editors:
Lu C. Metal-cavity surface-emitting nanolasers. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2012. Available from: http://hdl.handle.net/2142/32042
University of Illinois – Urbana-Champaign
2.
Dave, Harshil H.
Enhanced digital modulation of coherently coupled vertical cavity laser arrays: theory and application.
Degree: PhD, Electrical & Computer Engr, 2020, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/107925
► Dynamic properties of coherently coupled 2x1 vertical-cavity surface-emitting laser (VCSEL) arrays have been studied theoretically and experimentally. Directly modulated VCSELs are the dominant digital light…
(more)
▼ Dynamic properties of coherently coupled 2x1
vertical-
cavity surface-
emitting laser (VCSEL) arrays have been studied theoretically and experimentally. Directly modulated VCSELs are the dominant digital light source in short-haul data communication links due to their low cost and low operating power. Due to the demand for faster internet speeds and high-performance data centers, there is an ever-increasing need for high-bandwidth, low-power, and low-cost laser sources. An ideal laser source would have data-rates exceeding 100 Gb/s, energy-per-bit ratios reaching less than 1 pJ/bit, and be fabricated/integrated using conventional methods. In this dissertation, monolithic 2x1 mutually phase-locked 850 nm VCSEL arrays, based on ion-implantation and photonic crystal design, are studied for high-speed datacom applications. From the theoretical perspective, coupled-mode rate equations are used to describe carrier-photon interactions in optically coupled semiconductor laser arrays. Bandwidth enhancement in phased laser arrays is explained using small-signal frequency-domain pole-zero analysis on coupled-mode rate equations. The effects of complex coupling coefficient, associated with index-antiguided and gain-guiding, on coupled laser dynamics, are explored. We study multiple modulation techniques, including single-, in-sync, and out-of-sync modulation using pole-zero analysis. We discover that bandwidth enhancement can be practically implemented using in-sync modulation of asymmetric arrays, which is experimentally verified. Dynamics surrounding PT-symmetry breaking and exceptional points are also studied using pole-zero analysis. By tuning the coupled
lasers to an exceptional point, the array supermodes become indistinguishable, and the coupled-laser array forces the input signals into synchrony. Experimentally, we show progress on phased VCSEL arrays that can be designed to operate reliably through control of individual injection current to each laser element. In this manner, nearly all fabricated arrays can be biased to be mutually phase-locked. This dissertation attempts to visualize and characterize the locking region between two neighboring
lasers by measuring far-field visibility to create a two-dimensional visibility map. Experimental data show that the locking region can be shifted or changed by ambient temperature, asymmetric array design, fabrication imperfections, and multimode operation. Additionally, the differential resistance, relative intensity noise, and harmonic distortion are measured to characterize the behavior of coherently coupled laser arrays in the locking region. Two-dimensional maps of total relative intensity noise and total harmonic distortion are created to visualize laser array dynamics in the locking region. We report high-speed digital modulation of 36 Gb/s by supplying the signal to both laser elements simultaneously. The resulting eye diagram is shown to be improved under coherent-coupling conditions. The analysis in this dissertation shows that the laser array must be carefully…
Advisors/Committee Members: Choquette, Kent D (advisor), Choquette, Kent D (Committee Chair), Goddard, Lynford L (committee member), Schutt-Aine, José (committee member), Dragic, Peter (committee member).
Subjects/Keywords: Semiconductor lasers; phased arrays; Vertical-cavity surface-emitting lasers; optical communication
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APA (6th Edition):
Dave, H. H. (2020). Enhanced digital modulation of coherently coupled vertical cavity laser arrays: theory and application. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/107925
Chicago Manual of Style (16th Edition):
Dave, Harshil H. “Enhanced digital modulation of coherently coupled vertical cavity laser arrays: theory and application.” 2020. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/107925.
MLA Handbook (7th Edition):
Dave, Harshil H. “Enhanced digital modulation of coherently coupled vertical cavity laser arrays: theory and application.” 2020. Web. 13 Apr 2021.
Vancouver:
Dave HH. Enhanced digital modulation of coherently coupled vertical cavity laser arrays: theory and application. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2020. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/107925.
Council of Science Editors:
Dave HH. Enhanced digital modulation of coherently coupled vertical cavity laser arrays: theory and application. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2020. Available from: http://hdl.handle.net/2142/107925
University of Illinois – Urbana-Champaign
3.
Su, Guan-Lin.
Dielectric micro-cavity surface-emitting lasers.
Degree: MS, 1200, 2014, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/49757
► In recent years, various metal-cavity nano-lasers have been theoretically studied and experimentally realized because it is believed that their small sizes can actually bring large…
(more)
▼ In recent years, various metal-
cavity nano-
lasers have been theoretically studied and experimentally realized because it is believed that their small sizes can actually bring large potential in the next-generation dense photonic integration and optical interconnects. However, the absorption loss in the metal fundamentally impedes the practical use of metal-
cavity nano-
lasers, as most of the demonstrated devices could only work either under optical pumping or at 77 K, except for the metal-
cavity surface-
emitting laser structure that came out from our group in 2010.
In this thesis, the metallic
cavity sidewalls in the previous design were replaced by dielectric material to reduce extra metal loss. Both theoretical and experimental studies on such dielectric micro-
cavity surface-
emitting lasers are presented. In addition, issues related to
cavity size reduction are also investigated. A theoretical model, including the electronic band structure of the active material and the optical properties of the laser
cavity, has been formulated to predict the working potential of the laser wafer, which was designed for actual fabrication. Lasing characteristics in devices having diameters ranging from 5 µm down to 2 µm have been demonstrated under continuous wave, electrical injection at room temperature. Threshold currents from devices with different diameters were collected for further study.
The working devices generally had threshold currents around hundreds of µA, while their metal-
cavity counterparts had previously-reported threshold currents in a few mA level. Such a two- to three-fold reduction in threshold current for a given device diameter can be attributed to the absence of metal absorption loss in the sidewalls, which is the major advantage of dielectric micro-
cavity. Furthermore, besides the decrease of transverse optical confinement factor, the increase of threshold current density with the decrease of device diameter highlights the importance of controlling the sidewall roughness during fabrication.
Advisors/Committee Members: Chuang, Shun-Lien (advisor), Chew, Weng Cho (advisor).
Subjects/Keywords: micro-cavities; vertical-cavity surface-emitting lasers; semiconductor lasers
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APA (6th Edition):
Su, G. (2014). Dielectric micro-cavity surface-emitting lasers. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/49757
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Su, Guan-Lin. “Dielectric micro-cavity surface-emitting lasers.” 2014. Thesis, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/49757.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Su, Guan-Lin. “Dielectric micro-cavity surface-emitting lasers.” 2014. Web. 13 Apr 2021.
Vancouver:
Su G. Dielectric micro-cavity surface-emitting lasers. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2014. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/49757.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Su G. Dielectric micro-cavity surface-emitting lasers. [Thesis]. University of Illinois – Urbana-Champaign; 2014. Available from: http://hdl.handle.net/2142/49757
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
4.
Ragunathan, Gautham.
Design and fabrication of vertical external cavity surface-emitting lasers.
Degree: MS, 1200, 2014, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/50518
► This thesis examines the design and fabrication of a high output power, surface-emitting laser, known as a vertical external cavity surface-emitting laser (VECSEL). A VECSEL…
(more)
▼ This thesis examines the design and fabrication of a high output power,
surface-
emitting laser, known as a
vertical external
cavity surface-
emitting laser (VECSEL). A VECSEL utilizes a free space
cavity along with larger transverse
cavity dimensions, to extract higher output power. To aid the design of the VECSEL, the thesis begins with fabrication and experimental characterization of
vertical-
cavity surface-
emitting lasers (VCSELs). After the structure and operation of a VCSEL is overviewed, the fabrication of an oxide-confined VCSEL will be detailed. The VCSEL wafers’ epitaxial structures have a variation in their doping concentration profile in the p-type distributed Bragg reflector mirrors, to examine the tradeoff in their electrical and optical properties. This tradeoff is integral to both the VCSEL and VECSEL designs. A simulation of the VCSEL devices is performed and compared to experimental characterization. Based on these results, VECSEL devices are then designed for fabrication. Two sets of VECSEL structures are overviewed: one set is designed for optical pumping and one set is designed for electrical injection. The fabrication process for the optically pumped
lasers is described and the devices are then characterized. Optically pumped VECSELs demonstrate lasing action and show similar trends with regard to the simulated doping concentration. Next, a design of a mask layout for electrically pumped VECSELs, composed of a top metal, a mesa layer to provide current isolation, and an implant aperture, is overviewed. Electrically injected VECSELs are fabricated through the use of ion implantation, backside infrared alignment, chemical mechanical polishing, bonding to Cu substrates for use as a heatsink, and wet etching for electrical isolation. Free space
cavity design and characterization methodology for the VECSELs are described. While lasing action of electrically injected VECSELs is not observed, future modifications to design and processing are suggested.
Advisors/Committee Members: Choquette, Kent D. (advisor).
Subjects/Keywords: Lasers; Vertical-Cavity Surface-Emitting Lasers (VCSEL); Photonics; Fabrication; Characterization; Design
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APA (6th Edition):
Ragunathan, G. (2014). Design and fabrication of vertical external cavity surface-emitting lasers. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/50518
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ragunathan, Gautham. “Design and fabrication of vertical external cavity surface-emitting lasers.” 2014. Thesis, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/50518.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ragunathan, Gautham. “Design and fabrication of vertical external cavity surface-emitting lasers.” 2014. Web. 13 Apr 2021.
Vancouver:
Ragunathan G. Design and fabrication of vertical external cavity surface-emitting lasers. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2014. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/50518.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ragunathan G. Design and fabrication of vertical external cavity surface-emitting lasers. [Thesis]. University of Illinois – Urbana-Champaign; 2014. Available from: http://hdl.handle.net/2142/50518
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
5.
Fryslie, Stewart T.
Modulation of coherently coupled surface-emitting laser arrays: analysis and applications.
Degree: PhD, Electrical & Computer Engr, 2017, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/97293
► Vertical-cavity surface-emitting lasers (VCSELs) have become the dominant source for optical data communication links in computer server, data center, and super computer applications. Driven by…
(more)
▼ Vertical-
cavity surface-
emitting lasers (VCSELs) have become the dominant source for optical data communication links in computer server, data center, and super computer applications. Driven by the exponential increase of performance in information technology, data centers, and computational power, data transmission bandwidth is required to increase exponentially as well. Furthermore, as data centers become physically larger, utilizing more interconnects and requiring longer rack-to-rack fiber transmission distance, low power consumption and narrow spectral width for reduced signal dispersion become increasingly important. This work discusses the development of phased, ion-implanted, PhC VCSEL arrays for coherently coupled operation and modulation bandwidth enhancement with narrow spectral width emission. In this dissertation, monolithic mutual optical injection locking induced laser dynamics in phased, coherently coupled implant-defined PhC VCSEL arrays are investigated in detail both theoretically and experimentally. A model based on the well-established injection-locking laser rate equations is used to intuitively explain the physics of various experimental phenomena. An operation procedure, in which current isolation and bias conditions are leveraged to control array index profile and coupling phase, is developed to achieve coherently coupled operation of the phased VCSEL arrays reproducibly with high yield. An experimental study on the modulation characteristics and locking range dynamics of coherently coupled VCSEL arrays is conducted, showing significant improvements in operational procedures, performance, and device manufacturing. A record VCSEL 3 dB bandwidth of 37 GHz (receiver limited) is obtained under highly single-mode coherent operation with narrow spectral width and increased output power while the laser array is biased at low current density. Additionally, this result has been duplicated by multiple devices, under coherently coupled operation in either the in-phase or out-of-phase mode. Bandwidth enhancement beyond 30 GHz has been shown to be reproducible for several different photonic crystal patterns, and bias conditions for bandwidth enhancement have been shown to be stable and reproducible for the same device design across the sample.
Advisors/Committee Members: Choquette, Kent (advisor), Choquette, Kent (Committee Chair), Schutt-Aine, Jose (committee member), Goddard, Lynford (committee member), Dragic, Peter (committee member).
Subjects/Keywords: Semiconductor lasers; Phased arrays; Vertical-cavity surface-emitting lasers; Optical communications
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APA ·
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APA (6th Edition):
Fryslie, S. T. (2017). Modulation of coherently coupled surface-emitting laser arrays: analysis and applications. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/97293
Chicago Manual of Style (16th Edition):
Fryslie, Stewart T. “Modulation of coherently coupled surface-emitting laser arrays: analysis and applications.” 2017. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/97293.
MLA Handbook (7th Edition):
Fryslie, Stewart T. “Modulation of coherently coupled surface-emitting laser arrays: analysis and applications.” 2017. Web. 13 Apr 2021.
Vancouver:
Fryslie ST. Modulation of coherently coupled surface-emitting laser arrays: analysis and applications. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/97293.
Council of Science Editors:
Fryslie ST. Modulation of coherently coupled surface-emitting laser arrays: analysis and applications. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/97293
University of Illinois – Urbana-Champaign
6.
Wu, Mong-Kai.
Development of vertical cavity transistor laser and microcavity laser.
Degree: PhD, 1200, 2014, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/49650
► An energy-efficient semiconductor laser is of great interest for the massive data transmission demands in butt computing servers and supercomputing technologies. Currently, commercial vertical-cavity surface-emitting…
(more)
▼ An energy-efficient semiconductor laser is of great interest for the massive data transmission demands in butt computing servers and supercomputing technologies. Currently, commercial
vertical-
cavity surface-
emitting diode
lasers (VCSELs) have achieved a data transmission rate of 25 Gbit/s per channel. However, the VCSEL bandwidth is limited by the slow recombination lifetime in the active region, which is the major challenge to transmitting at a data rate greater than 60 Gbit/s for a single VCSEL.
To push the modulation speed, Purcell enhancement in the small volume and high Q
cavity can be applied in microcavity VCSELs, enhancing the spontaneous recombination rate. In the first part of the dissertation we demonstrate that the microcavity VCSEL has a reduced recombination rate of 0.5 ns when the aperture size is less than 3 μm. With improved RF layout design and fabrication, we demonstrate a microcavity laser operating error-free at 40 Gbit/s.
In the second part of the dissertation, we demonstrate the first
vertical cavity transistor laser (VCTL) operation. Due to the dynamic charge transport in the active region, the transistor laser can achieve shorter carrier lifetime (~ 29 ps), making it especially suitable for high-speed
lasers. We discuss the VCTL material and layout design, including how to reduce the parasitics via layout and process development. With three design iterations, we achieve a highly efficient VCTL.
Advisors/Committee Members: Feng, Milton (advisor), Feng, Milton (Committee Chair), Schutt-Ainé, José E. (committee member), Dallesasse, John M. (committee member), Goddard, Lynford L. (committee member).
Subjects/Keywords: vertical cavity transistor laser; microcavity laser; surface-emitting vertical-cavity lasers; energy efficient
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APA ·
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APA (6th Edition):
Wu, M. (2014). Development of vertical cavity transistor laser and microcavity laser. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/49650
Chicago Manual of Style (16th Edition):
Wu, Mong-Kai. “Development of vertical cavity transistor laser and microcavity laser.” 2014. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/49650.
MLA Handbook (7th Edition):
Wu, Mong-Kai. “Development of vertical cavity transistor laser and microcavity laser.” 2014. Web. 13 Apr 2021.
Vancouver:
Wu M. Development of vertical cavity transistor laser and microcavity laser. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2014. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/49650.
Council of Science Editors:
Wu M. Development of vertical cavity transistor laser and microcavity laser. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2014. Available from: http://hdl.handle.net/2142/49650
University of Illinois – Urbana-Champaign
7.
O'brien, Thomas.
High-power single-mode vertical-cavity surface-emitting lasers.
Degree: MS, 1200, 2012, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/32019
► Since their invention in 1979, vertical-cavity surface-emitting lasers (VCSELs) have been the focus of many research efforts due to the wide applicability of so many…
(more)
▼ Since their invention in 1979,
vertical-
cavity surface-
emitting lasers (VCSELs) have been the focus of many research efforts due to the wide applicability of so many of their features. Those that operate in the single-mode regime with sufficiently high power are of particular interest because of the need for an energy-efficient solution to the shrinking bit size in hard disk drives.
This work addresses this problem by a careful study of the state-of-the-art approaches to high-power single-mode lasing and by integrating the fundamental operating principles into new, novel approaches. The design rules, optimization parameters, fabrication, and characterization of three different structures are presented with an in-depth analysis of performance and future improvement. The devices presented include the metallic spatial filter, the extended pillar design with experimental verification of optimized higher order mode loss, and the
surface relief design with an experimentally verified model.
The metallic spatial filter is found to show peak output power near 12 mW with a transverse mode spacing of only a few angstroms. The extended pillar design is presented as an improvement over the metallic spatial filter, along with a systematic approach to suppressing the lasing behavior of higher order modes within the
cavity. By removing the high reflectivity around the perimeter of the
cavity, over 40 mW of single-peak power and 3 mW of single-mode power are attained. An experimental optimization of the oxidation aperture with regard to the size of the external pillar is also presented. Finally, the
surface relief structure is presented with full two-dimensional design simulations. Single-mode power near 3 mW with a very low threshold of below 5 mA is shown along with experimental verification of modeling results. In addition, the metallic
surface relief design is proposed as a future improvement, along with some preliminary modeling results.
Advisors/Committee Members: Chuang, Shun-Lien (advisor).
Subjects/Keywords: vertical-cavity surface-emitting lasers (VCSEL); Single-Mode; High-Power
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APA (6th Edition):
O'brien, T. (2012). High-power single-mode vertical-cavity surface-emitting lasers. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/32019
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
O'brien, Thomas. “High-power single-mode vertical-cavity surface-emitting lasers.” 2012. Thesis, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/32019.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
O'brien, Thomas. “High-power single-mode vertical-cavity surface-emitting lasers.” 2012. Web. 13 Apr 2021.
Vancouver:
O'brien T. High-power single-mode vertical-cavity surface-emitting lasers. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2012. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/32019.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
O'brien T. High-power single-mode vertical-cavity surface-emitting lasers. [Thesis]. University of Illinois – Urbana-Champaign; 2012. Available from: http://hdl.handle.net/2142/32019
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
8.
Griffin, Benjamin G.
Design and characterization of semiconductor laser structures for hydrogen sensing applications.
Degree: PhD, 1200, 2013, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/44428
► As gas prices continue to rise and fossil fuels pollute our environment, various alternative fuel sources are being actively pursued. Hydrogen shows considerable promise due…
(more)
▼ As gas prices continue to rise and fossil fuels pollute our environment, various alternative fuel sources are being actively pursued. Hydrogen shows considerable promise due to its virtually unlimited supply, energy conversion efficiency, and potentially neutral impact on the environment. However, due to the flammability of hydrogen gas in concentrations as low as 4% in air, reliable sensors capable of detecting small concentrations of hydrogen with quick response times are a necessity.
Photonic-based gas sensors have a wide assortment of advantages over other sensing mechanisms due to their high sensitivity and quick response time. Therefore, several platforms in which semiconductor
lasers can be functionalized to detect hydrogen concentrations below the lower explosive limit have been developed. The laser structures were chosen such that there already exist well-established fabrication technologies, and the functionalization method was designed to be easy, practical, and inexpensive so that these devices can be mass produced using existing technologies.
Four different types of hydrogen sensors utilizing thin films of palladium integrated within the structures of semiconductor
lasers have been studied. This study includes the design, simulation, fabrication, characterization, and optimization of the devices. The palladium catalyst layer is well known to react to hydrogen gas, forming palladium hydride with optical properties dependent on the hydrogen concentration. This reaction yields a change in complex refractive index and thus also the laser’s output power and peak wavelength. The advantages of these sensors are their small size, high sensitivity, wide dynamic range, inline integration, and scalability to arrays.
This thesis is organized into four sections. First, a brief analysis of the rising importance of hydrogen energy sources is presented, followed by an overview of the current state of hydrogen sensing technologies discussing the advantages and disadvantages of each method. Then, a description of the testing setup and procedure common to all device types is presented. Afterward, an in-depth overview is presented of each of the sensors in terms of the device designs, simulation methods and results, fabrication processes, and experimental measurement results. Finally, comparisons of these device designs are offered and conclusions are made.
Advisors/Committee Members: Goddard, Lynford L. (advisor), Goddard, Lynford L. (Committee Chair), Choquette, Kent D. (committee member), Carney, Paul S. (committee member), Liu, Gang Logan (committee member).
Subjects/Keywords: Lasers; Laser Sensing; Laser Fabrication; Hydrogen Sensing; Palladium; Photonic Crystals; Vertical Cavity Surface Emitting Lasers (VCSELs); Vertical-Cavity Lasers; Distributed Bragg Reflector (DBR) Lasers; Distributed Feedback (DFB) Lasers
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APA (6th Edition):
Griffin, B. G. (2013). Design and characterization of semiconductor laser structures for hydrogen sensing applications. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/44428
Chicago Manual of Style (16th Edition):
Griffin, Benjamin G. “Design and characterization of semiconductor laser structures for hydrogen sensing applications.” 2013. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/44428.
MLA Handbook (7th Edition):
Griffin, Benjamin G. “Design and characterization of semiconductor laser structures for hydrogen sensing applications.” 2013. Web. 13 Apr 2021.
Vancouver:
Griffin BG. Design and characterization of semiconductor laser structures for hydrogen sensing applications. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2013. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/44428.
Council of Science Editors:
Griffin BG. Design and characterization of semiconductor laser structures for hydrogen sensing applications. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2013. Available from: http://hdl.handle.net/2142/44428
University of Missouri – Columbia
9.
Assafli, Hayder.
Experimental evaluation of characteristic temperature with varying duty cycles in 2μm vertical cavity surface emitting lasers due to external optical pumping.
Degree: 2013, University of Missouri – Columbia
URL: http://hdl.handle.net/10355/38533
► [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Vertical cavity surface emitting lasers (VCSELs) are of interest due to their small size, low…
(more)
▼ [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.]
Vertical cavity surface emitting lasers (VCSELs) are of interest due to their small size, low cost, tunability, and excellent beam quality. Moreover, the near infrared is one of the most interesting regions in the electromagnetic spectrum because of various applications. In fact, many environmental and gas sensing applications are dedicated to this region. VCSELs are able to generate good power output in the NIR region compared to other types of
lasers. However, the output power is limited by the amount of heat generated inside the active region of these devices. In addition, the output varies with the operating temperature of the laser due to unwanted transitions that occur between the energy states of the active medium. In this thesis, the temperature sensitivity of a previously designed VCSEL device
emitting at 2um is fabricated, and the optical output is studied extensively. The characteristic temperature is recorded and analyzed at different operating duty cycles showing a linear relationship between the temperature sensitivity and the operating duty cycle in pulsing mode. Moreover, the continuous operation mode was also investigated determining the saturation region of the device.
Advisors/Committee Members: Triplett, Gregory Edward, 1973- (advisor).
Subjects/Keywords: vertical cavity surface emitting lasers; near infrared; temperature sensitivity; operating duty cycles
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APA (6th Edition):
Assafli, H. (2013). Experimental evaluation of characteristic temperature with varying duty cycles in 2μm vertical cavity surface emitting lasers due to external optical pumping. (Thesis). University of Missouri – Columbia. Retrieved from http://hdl.handle.net/10355/38533
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Assafli, Hayder. “Experimental evaluation of characteristic temperature with varying duty cycles in 2μm vertical cavity surface emitting lasers due to external optical pumping.” 2013. Thesis, University of Missouri – Columbia. Accessed April 13, 2021.
http://hdl.handle.net/10355/38533.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Assafli, Hayder. “Experimental evaluation of characteristic temperature with varying duty cycles in 2μm vertical cavity surface emitting lasers due to external optical pumping.” 2013. Web. 13 Apr 2021.
Vancouver:
Assafli H. Experimental evaluation of characteristic temperature with varying duty cycles in 2μm vertical cavity surface emitting lasers due to external optical pumping. [Internet] [Thesis]. University of Missouri – Columbia; 2013. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10355/38533.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Assafli H. Experimental evaluation of characteristic temperature with varying duty cycles in 2μm vertical cavity surface emitting lasers due to external optical pumping. [Thesis]. University of Missouri – Columbia; 2013. Available from: http://hdl.handle.net/10355/38533
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
10.
Liu, Michael E.
Development of high speed vertical cavity surface-emitting semiconductor diode laser and transistor laser.
Degree: PhD, Electrical & Computer Engr, 2016, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/92920
► High speed semiconductor lasers are used in optical transceivers for short-reach data links. With fast-growing data capacity and traffic in the data centers around the…
(more)
▼ High speed semiconductor
lasers are used in optical transceivers for short-reach data links. With fast-growing data capacity and traffic in the data centers around the globe, faster optical transceivers are demanded.
A microcavity
vertical cavity surface-
emitting laser (VCSEL) is able to show a high modulation bandwidth as well as single-mode operation; however, because of the small oxide aperture (< 3 µm), a microcavity VCSEL shows high resistance and low optical power. An 850 nm oxide-confined VCSEL with an aperture ~4 µm is able to show error-free transmission at 40 Gb/s. With an advanced DBR design for parasitic reduction as well as better thermal conduction and a short 0.5-λ
cavity with five quantum wells, an 850 nm VCSEL is able to demonstrate 57 Gb/s error-free transmission at 25 °C and 50 Gb/s error-free transmission at 85 °C.
The dynamic carrier profile in the base of a transistor laser makes it possible to have a shorter carrier lifetime than in a diode laser. The first oxide-confined
vertical cavity transistor laser (VCTL) is realized with a trench oxidation process and a lateral-feeding base metal design. To further reduce the excessive emitter series resistance, a VCTL with AlGaAs and dielectric distributed Bragg reflector (DBR) is fabricated. Because of the mismatch between the
cavity design and the quantum well emission, the VCTL is only able to show stimulated emission at low temperatures.
Advisors/Committee Members: Feng, Milton (advisor), Feng, Milton (Committee Chair), Jin, Jianming (committee member), Dallesasse, John M (committee member), Bayram, Can (committee member).
Subjects/Keywords: Vertical Cavity Surface-Emitting Laser; Vertical Cavity Transistor Laser
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APA (6th Edition):
Liu, M. E. (2016). Development of high speed vertical cavity surface-emitting semiconductor diode laser and transistor laser. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/92920
Chicago Manual of Style (16th Edition):
Liu, Michael E. “Development of high speed vertical cavity surface-emitting semiconductor diode laser and transistor laser.” 2016. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/92920.
MLA Handbook (7th Edition):
Liu, Michael E. “Development of high speed vertical cavity surface-emitting semiconductor diode laser and transistor laser.” 2016. Web. 13 Apr 2021.
Vancouver:
Liu ME. Development of high speed vertical cavity surface-emitting semiconductor diode laser and transistor laser. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2016. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/92920.
Council of Science Editors:
Liu ME. Development of high speed vertical cavity surface-emitting semiconductor diode laser and transistor laser. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2016. Available from: http://hdl.handle.net/2142/92920
University of Illinois – Urbana-Champaign
11.
Qiao, Pengfei.
Surface-emitting lasers for communications: novel metal-cavity microlasers and high-contrast-grating tunable VCSELs.
Degree: PhD, Electrical & Computer Engr, 2015, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/78730
► A comprehensive study of the theory and experiments of surface-emitting semiconductor lasers is presented. The design of novel micro and nanolasers using metal cavities for…
(more)
▼ A comprehensive study of the theory and experiments of
surface-
emitting semiconductor
lasers is presented. The design of novel micro and nanolasers using metal cavities for optical confinement is discussed. Theoretical modeling of quantum-well and quantum-dot emission properties, as well as experimental characterization of their coupling with optical cavities, are presented. Lasing behavior of our designed and fabricated devices is demonstrated at room temperature under continuous-wave and pulsed electrical injection with 3-μm and 1-μm
cavity diameters, respectively. This work provides the research path toward dense-integrable power-efficient on-chip light sources.
Surface-
emitting tunable
lasers for high-speed, long-haul communication are investigated. Novel laser designs using micro-electro-mechanical system controlled high-contrast gratings as tunable mirrors are presented. Rigorous, accurate, and efficient electromagnetic models for high-contrast gratings are developed. Our model enables us to design high-contrast gratings as one-dimensional or two-dimensional metastructures integrable on
surface-
emitting lasers. A wide range of optical functionalities such as broadband reflection, high-Q resonance, filtering, beam-steering, focusing, beam-conversion, and generation of photon orbital angular momentum are achieved. Our optical model is integrated with our laser
cavity model and the rate equation model to predict the temperature-dependent voltage tunable light output intensity and spectra. Future design and experimental strategies for heterogeneously integrated tunable
surface-
emitting lasers are discussed.
Advisors/Committee Members: Chew, Weng Cho (advisor), Chew, Weng Cho (Committee Chair), Dallesasse, John (committee member), Wasserman, Daniel M. (committee member), Cunningham, Brian T. (committee member).
Subjects/Keywords: Vertical-cavity surface-emitting lasers; Nanolasers; Nano-cavities; Quantum dots; High-contrast gratings; Tunable lasers; Micro-electro-mechanical systems; Subwavelength structures; Optical vortices
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APA (6th Edition):
Qiao, P. (2015). Surface-emitting lasers for communications: novel metal-cavity microlasers and high-contrast-grating tunable VCSELs. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/78730
Chicago Manual of Style (16th Edition):
Qiao, Pengfei. “Surface-emitting lasers for communications: novel metal-cavity microlasers and high-contrast-grating tunable VCSELs.” 2015. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/78730.
MLA Handbook (7th Edition):
Qiao, Pengfei. “Surface-emitting lasers for communications: novel metal-cavity microlasers and high-contrast-grating tunable VCSELs.” 2015. Web. 13 Apr 2021.
Vancouver:
Qiao P. Surface-emitting lasers for communications: novel metal-cavity microlasers and high-contrast-grating tunable VCSELs. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/78730.
Council of Science Editors:
Qiao P. Surface-emitting lasers for communications: novel metal-cavity microlasers and high-contrast-grating tunable VCSELs. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/78730
University of Arizona
12.
Gbele, Kokou.
Fabrication of Novel Structures to Enhance the Performance of Microwave, Millimeter Wave and Optical Radiators
.
Degree: 2016, University of Arizona
URL: http://hdl.handle.net/10150/612886
► This dissertation has three parts which are distinctive from the perspective of their frequency regime of operation and from the nature of their contributions to…
(more)
▼ This dissertation has three parts which are distinctive from the perspective of their frequency regime of operation and from the nature of their contributions to the science and engineering communities. The first part describes work that was conducted on a
vertical-external-
cavity surface emitting-laser (VECSEL) in the optical frequency regime. We designed, fabricated, and tested a hybrid distributed Bragg reflector (DBR) mirror for a VECSEL sub-
cavity operating at the laser emission wavelength of 1057 nm. The DBR mirror was terminated with a highly reflecting gold
surface and integrated with an engineered pattern of titanium. This hybrid mirror achieved a reduction in half of the number of DBR layer pairs in comparison to a previously reported, successful VECSEL chip. Moreover, the output power of our VECSEL chip was measured to be beyond 4.0Wwith an optical-to-optical efficiency of 19.4%. Excellent power output stability was demonstrated; a steady 1.0 W output at 15.0 W pump power was measured for over an hour. The second part reports on an ultrafast in situ pump-probing of the nonequlibrium dynamics of the gain medium of a VECSEL under mode-locked conditions. We proposed and successfully tested a novel approach to measure the response of the inverted carriers in the active region of a VECSEL device while it was operating under passively mode-locked conditions. We employed the dual-frequency-comb spectroscopy (DFCS) technique using an asynchronous optical sampling (ASOPS) method based on modified time-domain spectroscopy (TDS) to measure the nonequilibrium dynamics of the gain medium of a phase-locked VECSEL that we designed and fabricated to operate at the1030 nm emission wavelength. Our spectroscopic studies used a probe pulse of 100 fs and an in situ pump pulse of 13 ps. We probed the gain medium of the VECSEL and recorded a depletion time of 13 ps, a fast recovery period of 17 ps, and 110 ps for the slow recovery time. Our scans thus demonstrated a 140 ps full depletion-recovery cycle in the nonequilibrium state. The third part discusses work in the microwave and millimeter wave frequency regimes. A new method to fabricate Luneburg lenses was proposed and demonstrated. This type of lens is well known; it is versatile and has been used for many applications, including high power radars, satellite communications, and remote sensing systems. Because the fabrication of such a lens requires intricate and time consuming processes, we demonstrated the design, fabrication and testing of a Luneburg lens prototype using a 3-D printing rapid prototyping technique both at the X and Ka-V frequency bands. The measured results were in very good agreement with their simulated values. The fabricated X-band lens had a 12 cm diameter and produced a beam having a maximum gain of 20 dB and a beam directivity (half-power beam width (HPBW)) ranging from 12° to 19°). The corresponding Ka-V band lens had a 7 cm diameter; it produced a beam with a HPBW about the same as the X-band lens, but with a maximum gain of more than 20 dB.
Advisors/Committee Members: Ziolkowski, Richard W (advisor), Dvorak, Steven L. (committeemember), Tyo, Scott J. (committeemember), Ziolkowski, Richard W. (committeemember).
Subjects/Keywords: Femtosecond In-situ Pump and Probe;
Laser sources;
OPSEL-Optical Pumped Semiconductor Lasers;
VECSEL- Vertical External Cavity Surface Emitting Lasers;
Electrical & Computer Engineering;
3D Rapid prototyping Printer
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APA ·
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APA (6th Edition):
Gbele, K. (2016). Fabrication of Novel Structures to Enhance the Performance of Microwave, Millimeter Wave and Optical Radiators
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/612886
Chicago Manual of Style (16th Edition):
Gbele, Kokou. “Fabrication of Novel Structures to Enhance the Performance of Microwave, Millimeter Wave and Optical Radiators
.” 2016. Doctoral Dissertation, University of Arizona. Accessed April 13, 2021.
http://hdl.handle.net/10150/612886.
MLA Handbook (7th Edition):
Gbele, Kokou. “Fabrication of Novel Structures to Enhance the Performance of Microwave, Millimeter Wave and Optical Radiators
.” 2016. Web. 13 Apr 2021.
Vancouver:
Gbele K. Fabrication of Novel Structures to Enhance the Performance of Microwave, Millimeter Wave and Optical Radiators
. [Internet] [Doctoral dissertation]. University of Arizona; 2016. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10150/612886.
Council of Science Editors:
Gbele K. Fabrication of Novel Structures to Enhance the Performance of Microwave, Millimeter Wave and Optical Radiators
. [Doctoral Dissertation]. University of Arizona; 2016. Available from: http://hdl.handle.net/10150/612886
Texas A&M University
13.
Tyagi, Abhinav.
A PAM-4 VCSEL TRANSMITTER WITH 2.5 TAP NON-LINEAR EQUALIZER IN 65NM CMOS.
Degree: MS, Electrical Engineering, 2017, Texas A&M University
URL: http://hdl.handle.net/1969.1/173249
► This thesis presents a Vertical Cavity Surface Emitting Laser (VCSEL) based transmitter that uses a nonlinear equalizer to equalize for nonlinear and bandwidth limited behavior…
(more)
▼ This thesis presents a
Vertical Cavity Surface Emitting Laser (VCSEL) based transmitter that uses a nonlinear equalizer to equalize for nonlinear and bandwidth limited behavior of VCSEL. The transmitter employs PAM4 modulation scheme and a 2.5 tap nonlinear equalizer to maximize the
vertical eye opening and reduce the skew in PAM4 eyes resulting from nonlinear behavior. The equalizer can also compensate for the static nonlinearity resulting from finite output impedance of tail current sources and low bandwidth resulting from the large capacitance (parasitic and pad) and large resistance (of VCSEL) at the output node. The nonlinear equalizer reduces to a traditional linear equalizer in cases where VCSEL can be approximated as linear e.g., for high bias currents. For such cases, 2.5 tap equalizer provides performance improvement over traditional 2 tap equalizer due to larger memory. The proposed architecture here implements a 2.5 tap nonlinear equalizer using a look-up-table approach and can equalize for all 32 (4
2.5) rising, falling and non-transitioning edges separately. The proposed architecture also uses a nonuniform DAC in the current mode output driver which utilizes the information related to unused levels and results in improved resolution when compared against the traditionally used uniform DAC. The transmitter consumes a power of 250mW and achieves a data rate of 50Gbps with a power efficiency of 5pJ/bit. The core transmitter area including PRBS, LUT, serializer and output driver is 375um*500um while the total chip area is 1.4mm*1.4mm. The transmitter has been implemented in 65nm CMOS technology.
Advisors/Committee Members: Palermo, Samuel (advisor), Silva-Martinez, Jose (committee member), Kish, Laszlo (committee member), Mahapatra, Rabi (committee member).
Subjects/Keywords: Vertical Cavity Surface Emitting Laser (VCSEL); Nonlinear; Transmitter; Equalization
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APA (6th Edition):
Tyagi, A. (2017). A PAM-4 VCSEL TRANSMITTER WITH 2.5 TAP NON-LINEAR EQUALIZER IN 65NM CMOS. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173249
Chicago Manual of Style (16th Edition):
Tyagi, Abhinav. “A PAM-4 VCSEL TRANSMITTER WITH 2.5 TAP NON-LINEAR EQUALIZER IN 65NM CMOS.” 2017. Masters Thesis, Texas A&M University. Accessed April 13, 2021.
http://hdl.handle.net/1969.1/173249.
MLA Handbook (7th Edition):
Tyagi, Abhinav. “A PAM-4 VCSEL TRANSMITTER WITH 2.5 TAP NON-LINEAR EQUALIZER IN 65NM CMOS.” 2017. Web. 13 Apr 2021.
Vancouver:
Tyagi A. A PAM-4 VCSEL TRANSMITTER WITH 2.5 TAP NON-LINEAR EQUALIZER IN 65NM CMOS. [Internet] [Masters thesis]. Texas A&M University; 2017. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1969.1/173249.
Council of Science Editors:
Tyagi A. A PAM-4 VCSEL TRANSMITTER WITH 2.5 TAP NON-LINEAR EQUALIZER IN 65NM CMOS. [Masters Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/173249
University College Cork
14.
Daly, Aidan John.
Voltage properties of optically injected long wavelength VCSELs: Theory and experiment.
Degree: 2014, University College Cork
URL: http://hdl.handle.net/10468/1911
► Future high speed communications networks will transmit data predominantly over optical fibres. As consumer and enterprise computing will remain the domain of electronics, the electro-optical…
(more)
▼ Future high speed communications networks will transmit data predominantly over optical fibres. As consumer and enterprise computing will remain the domain of electronics, the electro-optical conversion will get pushed further downstream towards the end user. Consequently, efficient tools are needed for this conversion and due to many potential advantages, including low cost and high output powers, long wavelength
Vertical Cavity Surface Emitting Lasers (VCSELs) are a viable option. Drawbacks, such as broader linewidths than competing options, can be mitigated through the use of additional techniques such as Optical Injection Locking (OIL) which can require significant expertise and expensive equipment. This thesis addresses these issues by removing some of the experimental barriers to achieving performance increases via remote OIL. Firstly, numerical simulations of the phase and the photon and carrier numbers of an OIL semiconductor laser allowed the classification of the stable locking phase limits into three distinct groups. The frequency detuning of constant phase values (ø) was considered, in particular ø = 0 where the modulation response parameters were shown to be independent of the linewidth enhancement factor, α. A new method to estimate α and the coupling rate in a single experiment was formulated. Secondly, a novel technique to remotely determine the locked state of a VCSEL based on voltage variations of 2mV−30mV during detuned injection has been developed which can identify oscillatory and locked states. 2D & 3D maps of voltage, optical and electrical spectra illustrate corresponding behaviours. Finally, the use of directly modulated VCSELs as light sources for passive optical networks was investigated by successful transmission of data at 10 Gbit/s over 40km of single mode fibre (SMF) using cost effective electronic dispersion compensation to mitigate errors due to wavelength chirp. A widely tuneable MEMS-VCSEL was established as a good candidate for an externally modulated colourless source after a record error free transmission at 10 Gbit/s over 50km of SMF across a 30nm single mode tuning range. The ability to remotely set the emission wavelength using the novel methods developed in this thesis was demonstrated.
Advisors/Committee Members: Corbett, Brian, Peters, Frank H., SFI.
Subjects/Keywords: Voltage; Optical injection; Vertical cavity surface emitting laser (VCSEL)
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Manager
APA (6th Edition):
Daly, A. J. (2014). Voltage properties of optically injected long wavelength VCSELs: Theory and experiment. (Thesis). University College Cork. Retrieved from http://hdl.handle.net/10468/1911
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Daly, Aidan John. “Voltage properties of optically injected long wavelength VCSELs: Theory and experiment.” 2014. Thesis, University College Cork. Accessed April 13, 2021.
http://hdl.handle.net/10468/1911.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Daly, Aidan John. “Voltage properties of optically injected long wavelength VCSELs: Theory and experiment.” 2014. Web. 13 Apr 2021.
Vancouver:
Daly AJ. Voltage properties of optically injected long wavelength VCSELs: Theory and experiment. [Internet] [Thesis]. University College Cork; 2014. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10468/1911.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Daly AJ. Voltage properties of optically injected long wavelength VCSELs: Theory and experiment. [Thesis]. University College Cork; 2014. Available from: http://hdl.handle.net/10468/1911
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
15.
O'Brien, Jr, Thomas R.
High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering.
Degree: PhD, Electrical & Computer Engr, 2017, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/99460
► Design principles of impurity-induced disordered (IID) vertical-cavity surface-emitting lasers (VCSELs) are presented, including the influence of IID on electrical, optical, and mode-control properties. A transfer…
(more)
▼ Design principles of impurity-induced disordered (IID)
vertical-
cavity surface-
emitting lasers (VCSELs) are presented, including the influence of IID on electrical, optical, and mode-control properties. A transfer matrix method (TMM) is developed to account for the diffusion of Group III atoms of the distributed Bragg reflectors (DBR) that comprise the VCSEL. In addition, a simple fiber model is used to design the transverse profile of the IID regions to maximize single-mode output power.
IID VCSELs are fabricated with special attention given to the experimental parameters that affect both the lateral zinc diffusion profile and the level of intermixing caused by impurity diffusion. The resulting devices are compared to standard oxide-confined VCSELs and show lower operating voltage due to reduced contact and series resistance, higher operation ranges due to reduced thermal effects, and improved single-mode output due to the IID filter.
Additionally, the optimal design for maximum single-mode output is experimentally determined by varying the dimensions of the IID aperture for a fixed oxide confinement size. Devices with an IID:Oxide ratio of 1.3:3 perform the best, yielding 1.6 mW of single-mode power and maintaining single-mode output for most of their operating range. Because of the discrepancy between the simple model’s prediction and the experimental results, a more complex mode-matching model is developed to capture the physics of the tapered IID aperture. Experimental control of the modeled optimal IID aperture is then investigated by sweeping the stress of the IID mask films.
Finally, a single-interface mode-matching model is used to explore the viability of a metallic
surface-relief VCSEL. This new mode-filtering mechanism would allow
vertical integrability of multiple filtering mechanisms as well as alleviate current crowding issues often caused by
surface etching and
cavity damage.
Advisors/Committee Members: Dallesasse, John M (advisor), Dallesasse, John M (Committee Chair), Feng, Milton (committee member), Nahrstedt, Klara (committee member), Bayram, Can (committee member).
Subjects/Keywords: Vertical-cavity; Surface-emitting; Impurity-induced disordering; Zn diffusion; Single-mode
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APA (6th Edition):
O'Brien, Jr, T. R. (2017). High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/99460
Chicago Manual of Style (16th Edition):
O'Brien, Jr, Thomas R. “High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering.” 2017. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/99460.
MLA Handbook (7th Edition):
O'Brien, Jr, Thomas R. “High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering.” 2017. Web. 13 Apr 2021.
Vancouver:
O'Brien, Jr TR. High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/99460.
Council of Science Editors:
O'Brien, Jr TR. High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/99460
King Abdullah University of Science and Technology
16.
Alnakhli, Zahrah J.
Broadband Reflective Metalens in Visible Band Based on Bragg Reflector Multilayers for VECSEL Applications.
Degree: Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division, 2020, King Abdullah University of Science and Technology
URL: http://hdl.handle.net/10754/664908
► In conventional optics, curved lenses focus light rays to a focal point after light passes through them. These lenses have been designed to shape the…
(more)
▼ In conventional optics, curved lenses focus light rays to a focal point after light passes through them. These lenses have been designed to shape the wavefront of the incident beam as it emerges from the curved
surface of the lens. Conventional lenses suffer from many limitations, such as limited optical quality for imaging and integration difficulties with other optical components due to their large size, huge thickness, as well as being difficult to manufacture. Using subwavelength structure, it is possible to fabricate flat, thin lenses (metalenses) with new optical properties not found in nature, in which many fundamental properties of light (like polarization, focal point, and phase) can be controlled with high accuracy. This results in high resolution and high quality of optical imaging.
This thesis demonstrates a new design of reflective metalens, in which the metalens structure is integrated with another optical component: Distributed Bragg Reflector (DBR). The metalens planer is a two-dimensional ultrathin planer arranged as an array with subwavelength separation distance. In recent works, a metalens was integrated with (metal/dielectric)-mirrors to form reflective metalenses. Simulation results show that, high-focusing efficiency is obtained for the lens (> 60%) with the ability to
reflect96% of total incident optical power. In comparison, the new metalens-DBR design - processes maintain the same high-focusing efficiency, but with a reflectance of 99.99%, which makes it promising for optoelectronic integration and perfectly suitable for integration with
Vertical Cavity Surface Emitting Lasers (VCSEL) technology. This study of the optical properties: focal length; optical aberration; insensitivity to light polarization; and focusing efficiency of demonstrated metalens was done mainly by Finite Difference Time Domaine (FDTD) by using Lumerical FDTD solution.
Advisors/Committee Members: Li, Xiaohang (advisor), Roqan, Iman S. (committee member), Salama, Khaled N. (committee member).
Subjects/Keywords: Metalens; Vertical Cavity Surface Emitting; Diffractive Bragg Reflector
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APA (6th Edition):
Alnakhli, Z. J. (2020). Broadband Reflective Metalens in Visible Band Based on Bragg Reflector Multilayers for VECSEL Applications. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/664908
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Alnakhli, Zahrah J. “Broadband Reflective Metalens in Visible Band Based on Bragg Reflector Multilayers for VECSEL Applications.” 2020. Thesis, King Abdullah University of Science and Technology. Accessed April 13, 2021.
http://hdl.handle.net/10754/664908.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Alnakhli, Zahrah J. “Broadband Reflective Metalens in Visible Band Based on Bragg Reflector Multilayers for VECSEL Applications.” 2020. Web. 13 Apr 2021.
Vancouver:
Alnakhli ZJ. Broadband Reflective Metalens in Visible Band Based on Bragg Reflector Multilayers for VECSEL Applications. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2020. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10754/664908.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Alnakhli ZJ. Broadband Reflective Metalens in Visible Band Based on Bragg Reflector Multilayers for VECSEL Applications. [Thesis]. King Abdullah University of Science and Technology; 2020. Available from: http://hdl.handle.net/10754/664908
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Central Florida
17.
Zhang, Yu.
Self-heating control of edge emitting and vertical cavity surface emitting lasers.
Degree: 2014, University of Central Florida
URL: https://stars.library.ucf.edu/etd/1324
► Self-heating leads to temperature rise of laser diode and limits the output power, efficiency and modulation bandwidth due to increased loss and decreased differential gain.…
(more)
▼ Self-heating leads to temperature rise of laser diode and limits the output power, efficiency and modulation bandwidth due to increased loss and decreased differential gain. The main heat sources in laser diode during continuous wave operation are Joule heating and free carrier absorption loss. To control device self-heating, the epi structure needs to be designed with low electrical resistance and low absorption loss, while the heat flux must spread out of the device efficiently.
This dissertation presents the control of self-heating of both edge
emitting laser diodes and
vertical cavity surface emitting lasers (VCSELs). For the 980nm high power edge
emitting laser, asymmetric waveguide is used for low free carrier absorption loss. The waveguide and cladding materials are optimized for high injection efficiency. BeO heatsink is applied to spread the heat efficiently. Injection efficiency of 71% and internal loss of 0.3 cm-1 have been achieved. A total output power of 9.3 W is measured from 0.5cm long device at 14.5A injection current. To further reduce the internal loss, the development of 980nm quantum dot active region is studied. Threshold current density as low as 59A/cm2 is reached. For the VCSELs, oxide-free structure is used to solve the self-heating problem of oxide VCSELs. Removing the oxide layer and using AlAs in the DBRs leads to record low thermal resistance. Optimization of the DBRs leads to low resistance and low free carrier absorption. Power conversion efficiency higher than 50% is achieved. To further reduce device voltage and heat generation, the development of intracavity contacts devices is introduced.
Advisors/Committee Members: Deppe, Dennis.
Subjects/Keywords: Self heating; edge emitting laser; vertical cavity surface emitting laser; Electromagnetics and Photonics; Optics
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APA (6th Edition):
Zhang, Y. (2014). Self-heating control of edge emitting and vertical cavity surface emitting lasers. (Doctoral Dissertation). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/1324
Chicago Manual of Style (16th Edition):
Zhang, Yu. “Self-heating control of edge emitting and vertical cavity surface emitting lasers.” 2014. Doctoral Dissertation, University of Central Florida. Accessed April 13, 2021.
https://stars.library.ucf.edu/etd/1324.
MLA Handbook (7th Edition):
Zhang, Yu. “Self-heating control of edge emitting and vertical cavity surface emitting lasers.” 2014. Web. 13 Apr 2021.
Vancouver:
Zhang Y. Self-heating control of edge emitting and vertical cavity surface emitting lasers. [Internet] [Doctoral dissertation]. University of Central Florida; 2014. [cited 2021 Apr 13].
Available from: https://stars.library.ucf.edu/etd/1324.
Council of Science Editors:
Zhang Y. Self-heating control of edge emitting and vertical cavity surface emitting lasers. [Doctoral Dissertation]. University of Central Florida; 2014. Available from: https://stars.library.ucf.edu/etd/1324
University of Illinois – Urbana-Champaign
18.
Tan, Fei.
Signal modulation and relative intensity noise properties of transistor laser and nano-cavity VCSEL.
Degree: PhD, 1200, 2014, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/46808
► The transistor laser (TL) is a novel three-port optoelectronic device that exhibits intrinsic advantages such as fast base spontaneous recombination lifetime, high differential optical gain,…
(more)
▼ The transistor laser (TL) is a novel three-port optoelectronic device that exhibits intrinsic advantages such as fast base spontaneous recombination lifetime, high differential optical gain, and low carrier injection density. Due to these characteristics, we have demonstrated that the TL is able to achieve high speed resonance-free optical response as well as ultra-low laser relative intensity noise (RIN) reaching the “standard quantum limit”.
In addition, the unique three-port electronical/optical (E/O) characteristics permit electrical “read-out” of optical parameters, which benefits for high speed direct current/voltage modulation capability. We have demonstrated simultaneous E/O data modulation at 20 and 40 Gb/s, and the output signal linearity improvement of both optical and electrical signals of transistor
lasers. These provide TL intrinsic advantages for electronic/photonic integration.
Due to the better optical
cavity Q, shorter optical
cavity length and smaller device parasitics, the
vertical cavity transistor laser (VCTL) can in principle provide better performance than the edge-
emitting TL. We have demonstrated the selective oxide-confined VCTL operated at -80 °C. To improve the performance of the VCTL device, we studied the optical modal dimension effect on the modulation bandwidth, data modulation and laser RIN from the investigation of VCSELs. We have demonstrated the small
cavity oxide confined 850 nm VCSEL with ultra-low laser RIN and 40 Gb/s error-free data transmission. By shrinking the optical modal dimension further, the laser RIN is reaching the thermal limit. These experimental investigations help to further the improvement in VCTL design and development.
Advisors/Committee Members: Feng, Milton (advisor), Feng, Milton (Committee Chair), Jin, Jianming (committee member), Dallesasse, John M. (committee member), Goddard, Lynford L. (committee member).
Subjects/Keywords: Signal Modulation; Relative Intensity Noise; Transistor Laser; Nano-cavity vertical-cavity surface-emitting laser (VCSEL)
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APA (6th Edition):
Tan, F. (2014). Signal modulation and relative intensity noise properties of transistor laser and nano-cavity VCSEL. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/46808
Chicago Manual of Style (16th Edition):
Tan, Fei. “Signal modulation and relative intensity noise properties of transistor laser and nano-cavity VCSEL.” 2014. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/46808.
MLA Handbook (7th Edition):
Tan, Fei. “Signal modulation and relative intensity noise properties of transistor laser and nano-cavity VCSEL.” 2014. Web. 13 Apr 2021.
Vancouver:
Tan F. Signal modulation and relative intensity noise properties of transistor laser and nano-cavity VCSEL. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2014. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/46808.
Council of Science Editors:
Tan F. Signal modulation and relative intensity noise properties of transistor laser and nano-cavity VCSEL. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2014. Available from: http://hdl.handle.net/2142/46808
University of Rochester
19.
Baveja, Prashant P. (1984 - ).
Optical signal processing with reduced power
consumption.
Degree: PhD, 2012, University of Rochester
URL: http://hdl.handle.net/1802/24668
► Due to an exponential increase in the number of consumers using the voice, video and data services associated with modern optical transport systems, the footprint…
(more)
▼ Due to an exponential increase in the number of
consumers using the voice,
video and data services associated with
modern optical transport systems, the
footprint of these systems
can no longer be ignored. To that end, this thesis focuses
on
studying the nonlinear effects in highly nonlinear fibers (HNLFs)
and
semiconductor optical amplifiers (SOAs) along with thermally
induced power saturation
effects in vertical-cavity
surface-emitting lasers (VCSELs) from the standpoint
of reducing
power consumption associated with wavelength converter and
optical
signal regenerator topologies based on these devices. This thesis
begins
with a numerical investigation into the interplay between
dispersion and nonlinearity
for optimizing the performance and
reducing the input power requirement
of an all-optical
re-amplification and re-shaping (2R) regenerator based on
selfphase
modulation (SPM) and spectral filtering at 40 Gb/s.
Careful dispersion
optimization leads to 30% reduction in input
power required for HNLF-based
2R-regenerator without significant
performance degradation. However, there are
some associated
trade-offs and watt level input optical powers are still required.
This thesis therefore shifts focus towards amplified spontaneous
emission (ASE)-
induced enhancement in nonlinear effects [SPM and
four-wave mixing (FWM)] in
SOAs. Traditionally, SOAs have required
few tens of milliwatts (mWs) of input
powers for optical signal
processing. The modern SOAs investigated in this thesis
achieve
high internal ASE at high bias currents which reduces the effective
carrier
lifetime down to 10 ps. A simplified numerical model is
developed for these
devices which is used to study SPM and FWM.
For the case of SPM, a trade-off
between spectral broadening and
spectral symmetry due to ASE-mediated gain
dynamics is
demonstrated. This thesis also investigates the conversion
efficiency
(CE) and optical signal to noise ratio (OSNR)
properties of ASE-assisted FWM
in SOAs and demonstrates that in
the presence of high internal ASE, the requirement
on input
optical powers for wavelength conversion is reduced from 10s of
mWs to less than 1 mW. A 10-Gb/s L-band wavelength converter based
on FWM
is also realized experimentally.
While ASE-enhanced
nonlinear effects in SOAs do relax the requirements on
input
signal powers, the requirement of high bias currents places a
serious question
mark on the scalability of this technique. VCSELs
or vertical cavity SOAs
(VCSOAs) (low-Q version of standard
VCSELs) consume a fraction of electrical
power as compared to
SOAs. However the high speed operation of these devices
is limited
to a great extent by the thermally-induce power saturation effects.
This
thesis develops an empirical thermal model which can be used
for studying mechanisms
contributing to thermally induced optical
power rollover in VCSELs.
The model is applied to four
oxide-confined, 850 nm VCSEL designs. For all
these devices, it is
demonstrated that the power dissipation due to linear power
dissipation exceeds…
Subjects/Keywords: Highly nonlinear fibers; Optical signal processing; Semiconductor optical amplifiers; Thermal effects; Vertical-cavity surface-emitting lasers; Wavelength conversion; SOA; VCSEL; HNLF; CW
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APA (6th Edition):
Baveja, P. P. (. -. ). (2012). Optical signal processing with reduced power
consumption. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/24668
Chicago Manual of Style (16th Edition):
Baveja, Prashant P (1984 - ). “Optical signal processing with reduced power
consumption.” 2012. Doctoral Dissertation, University of Rochester. Accessed April 13, 2021.
http://hdl.handle.net/1802/24668.
MLA Handbook (7th Edition):
Baveja, Prashant P (1984 - ). “Optical signal processing with reduced power
consumption.” 2012. Web. 13 Apr 2021.
Vancouver:
Baveja PP(-). Optical signal processing with reduced power
consumption. [Internet] [Doctoral dissertation]. University of Rochester; 2012. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/1802/24668.
Council of Science Editors:
Baveja PP(-). Optical signal processing with reduced power
consumption. [Doctoral Dissertation]. University of Rochester; 2012. Available from: http://hdl.handle.net/1802/24668
20.
Pes, Salvatore.
Nanostructures-based 1.55 μm-emitting Vertical-(External)-Cavity Surface-Emitting Lasers for microwave photonics and coherent communications : V(E)CSELs à nanostructures quantiques à 1,55 μm pour les applications à l’optique hyperfréquence et les communications cohérentes.
Degree: Docteur es, Physique - Photonique, 2019, Rennes, INSA
URL: http://www.theses.fr/2019ISAR0013
► Les travaux de thèse présentés en ce mémoire ont comme objectif principal le développement des sources lasers à semi- conducteurs en cavité verticale sur substrat…
(more)
▼ Les travaux de thèse présentés en ce mémoire ont comme objectif principal le développement des sources lasers à semi- conducteurs en cavité verticale sur substrat InP, intègrent des régions actives à nanostructure quantiques, et émettent à des longueurs d’onde “télécom” (1550-1600 nm). Le développement d’un nouveau procédé technologique pour la réalisation de composants VCSEL compactes est détaillé. Ce procédé (nommé TSHEC) a été utilisé pour réaliser des émetteurs VCSELs en pompage optique sur plateforme hôte Si, ayant des performances très satisfaisantes. Ce même procédé a été adapté à la réalisation de VCSELs en pompage électrique, avec une étude préliminaire de la section de confinement électrique basée sur une BTJ en InGaAs, et le développement d’un nouveau jeu de masque dédié. Grace à la mise au point de la technologie des μ-cellules à cristaux liquides réalisé en partenariat avec LAAS, IMT Atlantique et C2N, on a pu adapter le procédé TSHEC pour la réalisation de dispositifs accordables. Une photodiode accordable autour de 1.55 μm a été réalisée, et des émetteurs VCSELs accordables basés sur la même technologie sont actuellement en cours de développement. Dans ces travaux on a également abordé le développement des VECSELs à base de bâtonnets quantiques InAs et émettent à 1.6 μm. Un premier dispositif a été réalisé et caractérisé en régime multimode et mono-fréquence. Finalement, la réalisation d’un banc expérimental pour la mesure directe de la constante de couplage dans des VECSELs bi-fréquence a été détaillée. Ce banc a permis de quantifier précisément le couplage existant entre deux états propres orthogonaux d’un VECSEL à puits quantiques émettent à 1.54 μm, et prochainement permettra la même étude dans des structures anisotropes, tels quels les bâtonnets quantiques ou le boites quantiques, dans le but d’investiguer l’effet de l’élargissement inhomogène présenté par ces milieux à gain en termes de couplage entre modes propres.
The work presented in this dissertation focus on the development of InP-based semiconductor vertical-cavity lasers, based on quantum nanostructures and emitting at the telecom wavelengths (1550-1600 nm). A new technological process for the realization of compact VCSELs is described. This process (named TSHEC) has been employed to realize optically-pumped VCSELs, integrated onto a host Silicon platform, with good performances. The same process has been adapted to develop an electrically-driven version of VCSELs: a preliminary study of the confinement section based on a InGaAs-BTJ is presented, together with the development of a mask set. Thanks to the development of the liquid crystals μ-cell technology (in collaboration with LAAS, IMT Atlantique et C2N), we realized a tunable photodiode at 1.55 μm, and a tunable VCSEL is currently under development. This work also presents the first realization of a 1.6 μm- emitting optically-pumped quantum dashes-based VECSELs, and its characterization in multi-mode and single-frequency regime. Finally, the realization of an experimental setup for…
Advisors/Committee Members: Folliot, Hervé (thesis director), Alouini, Mehdi (thesis director).
Subjects/Keywords: Developpement des dispositifs opto-électroniques en filière InP; Technologie en salle blanche; Mesures laser; Vertical-(external)-cavity surface-emitting lasers; Quantum nanostructures-based active media; Devices process and characterization; 530
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APA (6th Edition):
Pes, S. (2019). Nanostructures-based 1.55 μm-emitting Vertical-(External)-Cavity Surface-Emitting Lasers for microwave photonics and coherent communications : V(E)CSELs à nanostructures quantiques à 1,55 μm pour les applications à l’optique hyperfréquence et les communications cohérentes. (Doctoral Dissertation). Rennes, INSA. Retrieved from http://www.theses.fr/2019ISAR0013
Chicago Manual of Style (16th Edition):
Pes, Salvatore. “Nanostructures-based 1.55 μm-emitting Vertical-(External)-Cavity Surface-Emitting Lasers for microwave photonics and coherent communications : V(E)CSELs à nanostructures quantiques à 1,55 μm pour les applications à l’optique hyperfréquence et les communications cohérentes.” 2019. Doctoral Dissertation, Rennes, INSA. Accessed April 13, 2021.
http://www.theses.fr/2019ISAR0013.
MLA Handbook (7th Edition):
Pes, Salvatore. “Nanostructures-based 1.55 μm-emitting Vertical-(External)-Cavity Surface-Emitting Lasers for microwave photonics and coherent communications : V(E)CSELs à nanostructures quantiques à 1,55 μm pour les applications à l’optique hyperfréquence et les communications cohérentes.” 2019. Web. 13 Apr 2021.
Vancouver:
Pes S. Nanostructures-based 1.55 μm-emitting Vertical-(External)-Cavity Surface-Emitting Lasers for microwave photonics and coherent communications : V(E)CSELs à nanostructures quantiques à 1,55 μm pour les applications à l’optique hyperfréquence et les communications cohérentes. [Internet] [Doctoral dissertation]. Rennes, INSA; 2019. [cited 2021 Apr 13].
Available from: http://www.theses.fr/2019ISAR0013.
Council of Science Editors:
Pes S. Nanostructures-based 1.55 μm-emitting Vertical-(External)-Cavity Surface-Emitting Lasers for microwave photonics and coherent communications : V(E)CSELs à nanostructures quantiques à 1,55 μm pour les applications à l’optique hyperfréquence et les communications cohérentes. [Doctoral Dissertation]. Rennes, INSA; 2019. Available from: http://www.theses.fr/2019ISAR0013
21.
Brown, Stephen.
Theory and simulation of subwavelength high contrast gratings and their applications in vertical-cavity surface-emitting laser devices.
Degree: MS, 1200, 2012, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/29808
► This work intends to fully explore the qualities and applications of subwavelength gratings. Subwavelength gratings are diffraction gratings with physical dimensions less than the wavelength…
(more)
▼ This work intends to fully explore the qualities and applications of subwavelength gratings. Subwavelength gratings are diffraction gratings with physical dimensions less than the wavelength of incident light. It has been found that by tailoring specific dimension parameters, a number of different reflection profiles can be attained by these structures including high reflectivity or low reflectivity with broad and narrow spectral responses. In the course of this thesis the physical basis for this phenomenon will be presented as well as a mathematical derivation. After discussion of the mechanics of the reflection behavior, the methods used in modeling subwavelength gratings and designing them for specific functions will be explored. Following this, the fundamentals of
vertical-
cavity surface-
emitting lasers (VCSELs) will be discussed, and the applications of subwavelength gratings when used with these
lasers will follow. Several devices, both theoretical proposals and fabricated examples, will be presented in addition to the available performance measurements. Finally, the fabrication challenges that restrict subwavelength gratings from adoption as standard components in VCSEL design will be considered with regard to ongoing fabrication research.
Advisors/Committee Members: Choquette, Kent D. (advisor).
Subjects/Keywords: Subwavelength gratings; vertical-cavity surface-emitting lasers (VCSELs)
…visible vertical-cavity surface-emitting lasers,” IEEE
Journal of Quantum Electronics, vol. 33… …3
Applications with VCSELs
3.1
Vertical-Cavity Surface-Emitting Lasers
The focus of this… …vertical-cavity surface-emitting lasers. Chapter 2 has discussed how subwavelength
gratings… …vertical cavity surface emitting
laser polarization,” Journal of Vacuum Science and Technology B… …and Y. Suematsu, “GaInAsP/InP surface emitting injection lasers,”
Japanese Journal of…
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APA ·
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APA (6th Edition):
Brown, S. (2012). Theory and simulation of subwavelength high contrast gratings and their applications in vertical-cavity surface-emitting laser devices. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/29808
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Brown, Stephen. “Theory and simulation of subwavelength high contrast gratings and their applications in vertical-cavity surface-emitting laser devices.” 2012. Thesis, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/29808.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Brown, Stephen. “Theory and simulation of subwavelength high contrast gratings and their applications in vertical-cavity surface-emitting laser devices.” 2012. Web. 13 Apr 2021.
Vancouver:
Brown S. Theory and simulation of subwavelength high contrast gratings and their applications in vertical-cavity surface-emitting laser devices. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2012. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/29808.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Brown S. Theory and simulation of subwavelength high contrast gratings and their applications in vertical-cavity surface-emitting laser devices. [Thesis]. University of Illinois – Urbana-Champaign; 2012. Available from: http://hdl.handle.net/2142/29808
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
22.
Siriani, Dominic F.
Analysis and applications of coupled leaky-mode, implant-defined surface-emitting laser arrays.
Degree: PhD, 1200, 2011, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/24284
► Anti-guided vertical-cavity surface-emitting laser (VCSEL) arrays have been designed, fabricated, and characterized using a number of methods. Two-dimensional coherent arrays are useful for biological and…
(more)
▼ Anti-guided
vertical-
cavity surface-
emitting laser (VCSEL) arrays have been designed, fabricated, and characterized using a number of methods. Two-dimensional coherent arrays are useful for biological and atmospheric sensing, free-space and fiber-based optical links, high-power laser pumps, and optical imaging. Coherently coupled arrays exhibit desirable characteristics such as low beam divergence and high brightness. However, the fabrication procedures necessary for such designs are typically complicated and expensive. This work demonstrates and explores a new and much simpler anti-guided VCSEL array design using ion implantation and photonic crystal confinement. The origin of anti-guiding in these laser arrays is described in detail, and design rules for optimizing performance are discussed. A complete description of the means to achieve optical coupling in
surface-
emitting laser arrays, as well as the coherence in these arrays, is presented through both theoretical and experimental investigations. These
lasers are shown to be capable of producing highly coherent, single-mode, in-phase output beams. The application of such arrays as low-divergence and steerable sources is demonstrated experimentally.
Advisors/Committee Members: Choquette, Kent D. (advisor), Choquette, Kent D. (Committee Chair), Bernhard, Jennifer T. (committee member), Carney, Paul S. (committee member), Coleman, James J. (committee member), Eden, James G. (committee member).
Subjects/Keywords: Semiconductor laser arrays; Vertical-cavity surface-emitting lasers
…Vertical-cavity surface-emitting laser (VCSEL) arrays
are of particular interest… …for the lasers defined by implantation is much larger than the optical cavity
defined by the… …maximum output power. Therefore, single-mode
lasers may have a laser cavity that supports… …highlights one of
28
the significant advantages of surface-emitting laser arrays over edge… …Work
Coherent coupling of semiconductor edge-emitting laser and VCSEL arrays
has been…
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APA ·
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APA (6th Edition):
Siriani, D. F. (2011). Analysis and applications of coupled leaky-mode, implant-defined surface-emitting laser arrays. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/24284
Chicago Manual of Style (16th Edition):
Siriani, Dominic F. “Analysis and applications of coupled leaky-mode, implant-defined surface-emitting laser arrays.” 2011. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/24284.
MLA Handbook (7th Edition):
Siriani, Dominic F. “Analysis and applications of coupled leaky-mode, implant-defined surface-emitting laser arrays.” 2011. Web. 13 Apr 2021.
Vancouver:
Siriani DF. Analysis and applications of coupled leaky-mode, implant-defined surface-emitting laser arrays. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2011. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/24284.
Council of Science Editors:
Siriani DF. Analysis and applications of coupled leaky-mode, implant-defined surface-emitting laser arrays. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2011. Available from: http://hdl.handle.net/2142/24284
University of Illinois – Urbana-Champaign
23.
Matsudaira, Akira.
Novel nanolasers, nano-LEDs, and modal cutoff confinement light emitters.
Degree: PhD, 1200, 2012, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/32031
► Semiconductor metal nanocavity lasers and light emitting diodes together with novel modal cutoff confinement light emitters are investigated for optical interconnection application in future dense…
(more)
▼ Semiconductor metal nanocavity
lasers and light
emitting diodes together with novel modal cutoff confinement light emitters are investigated for optical interconnection application in future dense photonic integrated circuits. Several different
cavity structures are designed, processed, and characterized, and demonstrate operation with current injection at room temperature. We first examined metal-
cavity quantum-dot
surface-
emitting micro-
lasers. Different sizes of metal-DBR cavities are fabricated with
cavity volume reduction both in the lateral and
vertical dimensions following our theoretical design rules to optimize the performance. One of the smallest electrical injection
lasers is demonstrated with a minimum diameter of 1-m and a minimum hybrid DBR-Ag mirror of only 5.5 pairs. From the analysis of various sizes of diameter devices, it is found that self-heating is significant in the smaller diameter devices due to both the higher series resistance and higher threshold gain leading to a high carrier density.
For the further
cavity volume reduction, we have designed, fabricated, and characterized metal-encapsulated nano-light-emitters with bulk semiconductor in the active region. The first principal design rule is used to estimate the fundamental mode resonance and threshold condition. The result based on this design rule agrees very well with the numerical three-dimensional calculation. The device recipes have been developed through multiple iterations from the device characterization. The smallest metal
cavity diode emitter with electrical injection is 0.086 03 in terms of
emitting wavelength at room temperature. It is shown that the series resistance of metal-encapsulated nanocavities is much smaller than the metal coated VCSEL, suppressing the heat generation for the small diameter devices. The fabrication improvement shows a narrow linewidth
cavity mode in the metal nanocavity with a volume of 1.23 03 at room temperature.
To solve the problem of the high radiation loss caused by a metal mirror, we proposed novel nano/micro-cavities edge-
emitting laser using the mode-cutoff reflection of the fundamental TE mode from a metal-semiconductor-metal (MSM) region. The devices are examined by multiple aspects for their function, both qualitatively from the principle of operation and quantitatively from the analytical study of reflection coefficient and numerical simulations by the 2D and 3D models for practically designed devices. The numerical simulations including the metal loss suggest that room temperature lasing with a reasonable threshold material gain is achievable. We have also developed processing recipes to fabricate the device without any semiconductor dry-etching process. The preliminary electrical and optical characterizations of the proposed devices are performed showing excellent I-V characteristics with a thin hetero-junction diode. The light output curve shows a super-linear behavior suggesting possible lasing in the
cavity volume less than 3.
Advisors/Committee Members: Chuang, Shun-Lien (advisor), Chuang, Shun-Lien (Committee Chair), Choquette, Kent D. (committee member), Eden, James G. (committee member), Lyding, Joseph W. (committee member).
Subjects/Keywords: semiconductor laser; nanophotonics; nanolaser; nanoLEDs; cutoff confinement cavity; metal cavity; surface emitting lasers; light-emitting diode (LED)
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APA (6th Edition):
Matsudaira, A. (2012). Novel nanolasers, nano-LEDs, and modal cutoff confinement light emitters. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/32031
Chicago Manual of Style (16th Edition):
Matsudaira, Akira. “Novel nanolasers, nano-LEDs, and modal cutoff confinement light emitters.” 2012. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/32031.
MLA Handbook (7th Edition):
Matsudaira, Akira. “Novel nanolasers, nano-LEDs, and modal cutoff confinement light emitters.” 2012. Web. 13 Apr 2021.
Vancouver:
Matsudaira A. Novel nanolasers, nano-LEDs, and modal cutoff confinement light emitters. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2012. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/32031.
Council of Science Editors:
Matsudaira A. Novel nanolasers, nano-LEDs, and modal cutoff confinement light emitters. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2012. Available from: http://hdl.handle.net/2142/32031
24.
Camelin, Patrice.
Génération et contrôle d'impulsions localisées dans les lasers à semiconducteurs : Generation and control of localized pulses in semiconductor laser.
Degree: Docteur es, Physique, 2017, Université Côte d'Azur (ComUE)
URL: http://www.theses.fr/2017AZUR4120
► Les Structures localisées (SLs) apparaissent dans les milieux dissipatifs nonlinéaires ayant un grand rapport d'aspect et où plusieurs solutions coexistent pour la même gamme de…
(more)
▼ Les Structures localisées (SLs) apparaissent dans les milieux dissipatifs nonlinéaires ayant un grand rapport d'aspect et où plusieurs solutions coexistent pour la même gamme de paramètres. Elles ont des longueurs de corrélations bien plus courtes que la taille du système ce qui en fait des objets individuellement adressables. Les SLs ont été largement étudiées dans les résonateurs optiques pour leur potentiel dans le traitement tout-optique d'information. Nous focalisons nos recherches sur les structures localisées temporelles obtenues dans un laser à blocage de modes passif. Il s'agit, plus spécifiquement, d'un laser à Cavite Verticale Émettant par la Surface (VCSEL) monté dans une cavité externe délimitée par un Miroir Semiconducteur à Absorption Saturable (SESAM). Nous montrons que les pulses émis par ce système peuvent être individuellement allumés et éteints par le biais d'impulsions électriques dans le courant de pompage. Nous étudions la possibilité de déplacer ces pulses l'un par rapport à l'autre et/ou de reconfigurer leur disposition dans la cavité à l'aide d'une modulation du paramètre de pompage. Ceci nous a permis de découvrir un nouveau paradigme pour la dynamique pour les SLs, jusqu'ici étudiées seulement dans les systèmes à symétrie de parité (systèmes spatiaux et résonateurs à Fibre de (type Kerr). En effet, dans notre système, le temps de réponse fini du milieu semiconducteur introduit la causalité dans la cavité, brisant ainsi la symétrie de parité du système. Ceci a des conséquences très importantes sur la vitesse de propagation des SLs, sur leurs formes et sur leurs interactions. Dans la partie finale de ma thèse, inspiré par le résultat obtenu dans ce système, je m'intéresser à l'implémentationdes SLs spatio-temporelle, aussi appelées Balles de Lumière (BLs). En effet, une version similaire de ce système a servi pour implémenter des SLs dans la section transverse du résonateur, ce qui en fait un bon candidat pour générer des BLs. Nous étudions donc les modifications à apporter pour atteindre ces structures. Les indications obtenues ont suggéré de remplacer le VCSEL par un dispositif similaire mais incapable de laser sans un miroir externe. Ce dispositif, appelé demi-VCSEL ou VECSEL et son SESAM compatible ont été fabriqués par l'Institut d'Electronique et des Systèmes de Montpellier. L'optimisation des caractéristiques de ces dispositifs permet d'atteindre le régime de localisation temporelle, ce qui est un résultat prometteur vers les Balles de Lumière.
Localized Structures (LS) appear in non-linear dissipative mediums with a large aspect ratio and where several solutions coexist for the same range of parameters. They have a correlation length much shorter than the size of the system which makes them individually addressable objects. LS have been widely studied in optical resonators for their potential in all-optic informations processing. We focus our study on Temporal Localized Structures in a Passive Mode-Locked Laser. More specifically, we study a Vertical Cavity SurfaceEmitting Laser…
Advisors/Committee Members: Giudici, Massimo (thesis director).
Subjects/Keywords: Structures Localisées; Lasers à Cavité Verticale Émettant par la Surface (VCSEL); Blocage de modes passifs; Balles de lumière; Localized Structures; Vertical Cavity Surface-Emitting Lasers (VCSEL); Passive mode-locking; Light bullets
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APA (6th Edition):
Camelin, P. (2017). Génération et contrôle d'impulsions localisées dans les lasers à semiconducteurs : Generation and control of localized pulses in semiconductor laser. (Doctoral Dissertation). Université Côte d'Azur (ComUE). Retrieved from http://www.theses.fr/2017AZUR4120
Chicago Manual of Style (16th Edition):
Camelin, Patrice. “Génération et contrôle d'impulsions localisées dans les lasers à semiconducteurs : Generation and control of localized pulses in semiconductor laser.” 2017. Doctoral Dissertation, Université Côte d'Azur (ComUE). Accessed April 13, 2021.
http://www.theses.fr/2017AZUR4120.
MLA Handbook (7th Edition):
Camelin, Patrice. “Génération et contrôle d'impulsions localisées dans les lasers à semiconducteurs : Generation and control of localized pulses in semiconductor laser.” 2017. Web. 13 Apr 2021.
Vancouver:
Camelin P. Génération et contrôle d'impulsions localisées dans les lasers à semiconducteurs : Generation and control of localized pulses in semiconductor laser. [Internet] [Doctoral dissertation]. Université Côte d'Azur (ComUE); 2017. [cited 2021 Apr 13].
Available from: http://www.theses.fr/2017AZUR4120.
Council of Science Editors:
Camelin P. Génération et contrôle d'impulsions localisées dans les lasers à semiconducteurs : Generation and control of localized pulses in semiconductor laser. [Doctoral Dissertation]. Université Côte d'Azur (ComUE); 2017. Available from: http://www.theses.fr/2017AZUR4120
NSYSU
25.
Yang, Jih-da.
Application of Duobinary & PAM-4 Signal in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber.
Degree: Master, Electro-Optical Engineering, 2016, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1028116-141004
► With the highly development of nowadays mobile internet, cloud computing technologies and services have been evolving accordingly, indicating the necessity of constantly upgrading data centers.…
(more)
▼ With the highly development of nowadays mobile internet, cloud computing technologies and services have been evolving accordingly, indicating the necessity of constantly upgrading data centers. Cloud computing allows users to access and compute data at anytime and anywhere. To offer massive users such cloud services online, the speed of interconnection inside data centers is extremely critical, in addition to the computing capabilities. Besides, power consumption has been another key problem of developing data centers. Active optical cable (AOC) system is one of future-proof solutions for above-mentioned issues.
Vertical-
Cavity Surface-
Emitting Laser (VCSEL) has been considered as the main light source in AOCs due to its low power consumption and cost.
In the thesis, we will compare several modulation formats in a Short-Reach (SR) system using VCSEL and multimode fibers. In particular, using Non-return zero (NRZ), Pulse Amplitude Modulation 4 (PAM-4) and Duobinary modulation in VCSEL-based OM4 fiber transmission, this work compares their transmission performance and evaluates their possible development in the future.
Advisors/Committee Members: Yung-Jr Hung (chair), Yi-Jen Chiu (chair), Jye-Hong Chen (chair), Chia-chien Wei (committee member).
Subjects/Keywords: Vertical-Cavity Surface-Emitting Laser; Duobinary modulation; PAM-4 modulation; Short-Reach AOC; Multimode fiber
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APA (6th Edition):
Yang, J. (2016). Application of Duobinary & PAM-4 Signal in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1028116-141004
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yang, Jih-da. “Application of Duobinary & PAM-4 Signal in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber.” 2016. Thesis, NSYSU. Accessed April 13, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1028116-141004.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yang, Jih-da. “Application of Duobinary & PAM-4 Signal in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber.” 2016. Web. 13 Apr 2021.
Vancouver:
Yang J. Application of Duobinary & PAM-4 Signal in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber. [Internet] [Thesis]. NSYSU; 2016. [cited 2021 Apr 13].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1028116-141004.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yang J. Application of Duobinary & PAM-4 Signal in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1028116-141004
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
NSYSU
26.
Zhou, Ting-Wei.
Application of Carrier-Less Amplitude-Phase Modulation in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber.
Degree: Master, Electro-Optical Engineering, 2018, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0011118-175903
► This dissertation studies the application of carrier-less amplitude phase modulation (CAP) in short-reach MMF transmission. In addition to two different modulation orders (i.e., CAP-16 and…
(more)
▼ This dissertation studies the application of carrier-less amplitude phase modulation
(CAP) in short-reach MMF transmission. In addition to two different modulation orders
(i.e., CAP-16 and CAP-32), we adopted two kinds of filters in CAP modulation, which
are named by Filter 1 and Filter 2. The frequency responses of two data paths in Filter
1 are root raised cosine functions multiplied by sine and cosine, and this scheme is not
only inter symbol interference- (ISI-) free but also maintains orthogonality between two
paths. As to Filter 2, the root raised cosine function and its Hilbert transform are directly
used as the frequency responses of two data paths. Although higher spectral efficiency
can be achieved by Filter 2, the orthogonality between two paths does not hold unless
the roll-off factor is zero. We used the Volterra and decision feedback equalizer (DFE)
to equalize the CAP signals, and the corresponding improvement can demonstrate the
characteristics of the used filters.
First of all, we experimentally compared the CAP signals based on the two filters
at optical back-to-back. When the symbol rate is low, Filter 1 can outperform due to the
orthogonality. However, when the symbol rate increases, Filter 2 can perform better due
to its better spectral efficiency. In particular, when the system bandwidth was reduced
after 200- or 500-m MMF transmission, the highest data rate of CAP-16 was achieved
by Filter 2. Nonetheless, if CAP-32 was used, the highest data rate was accomplished
by Filter 1 because symbol rate was low to meet the requirement of higher SNR. Since
CAP-16 can achieve higher data rate compared to CAP-32, this work demonstrates that
Filter 2 is a potential candidate for future high-capacity short-reach MMF transmission.
Advisors/Committee Members: Chia-Chien Wei (committee member), Sheng-Kwang Hwang (chair), Yung-Jr Hung (chair), Chin-Ping Yu (chair).
Subjects/Keywords: Multimode Fiber; Vertical-Cavity Surface-Emitting Laser; Carrier-less Amplitude Phase Modulation; Short-Reach AOC
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APA ·
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MLA ·
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Manager
APA (6th Edition):
Zhou, T. (2018). Application of Carrier-Less Amplitude-Phase Modulation in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0011118-175903
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhou, Ting-Wei. “Application of Carrier-Less Amplitude-Phase Modulation in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber.” 2018. Thesis, NSYSU. Accessed April 13, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0011118-175903.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhou, Ting-Wei. “Application of Carrier-Less Amplitude-Phase Modulation in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber.” 2018. Web. 13 Apr 2021.
Vancouver:
Zhou T. Application of Carrier-Less Amplitude-Phase Modulation in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber. [Internet] [Thesis]. NSYSU; 2018. [cited 2021 Apr 13].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0011118-175903.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhou T. Application of Carrier-Less Amplitude-Phase Modulation in Short-Reach Optical Interconnection with 850-nm VCSELs and Multimode Fiber. [Thesis]. NSYSU; 2018. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0011118-175903
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
27.
Lakomy, Katherine A.
Size and reflectivity dependent optical loss in oxide-confined vertical-cavity surface-emitting lasers.
Degree: MS, Electrical & Computer Engr, 2017, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/97798
► This thesis characterizes the size and mirror reflectivity dependent optical loss in 850 nm vertical cavity surface-emitting lasers (VCSELs) to optimize future VCSEL designs. A…
(more)
▼ This thesis characterizes the size and mirror reflectivity dependent optical loss in 850 nm
vertical cavity surface-
emitting lasers (VCSELs) to optimize future VCSEL designs. A theoretical and experimental study of the excess optical loss in small diameter VCSELs with varying output coupling mirror reflectivity is presented. The size-dependent loss is measured using an optical technique where the subthreshold mode spectral splitting is input into a simple fiber wave-equation analysis to extract the imaginary component of the refractive index in the oxide aperture region, which clads the VCSEL core. In general the optical loss, as measured from the effective index confinement of the oxide aperture, increases with decreasing oxide diameter. In addition the optical loss, for the smallest oxide diameters, increases with increasing mirror reflectivity. In comparison for broad area
lasers, the mirror loss will increase with decreasing mirror reflectivity. A 2-dimensional simulation of mode profiles suggests the optical loss increases as the mirror reflectivity is increased due to the longer optical path length in the higher reflectivity mirrors.
Advisors/Committee Members: Choquette, Kent D (advisor).
Subjects/Keywords: Vertical cavity surface-emitting laser (VCSEL); Optical loss; Distributed Bragg reflector (DBR); Reflectivity
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APA ·
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APA (6th Edition):
Lakomy, K. A. (2017). Size and reflectivity dependent optical loss in oxide-confined vertical-cavity surface-emitting lasers. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/97798
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lakomy, Katherine A. “Size and reflectivity dependent optical loss in oxide-confined vertical-cavity surface-emitting lasers.” 2017. Thesis, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/97798.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lakomy, Katherine A. “Size and reflectivity dependent optical loss in oxide-confined vertical-cavity surface-emitting lasers.” 2017. Web. 13 Apr 2021.
Vancouver:
Lakomy KA. Size and reflectivity dependent optical loss in oxide-confined vertical-cavity surface-emitting lasers. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/97798.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lakomy KA. Size and reflectivity dependent optical loss in oxide-confined vertical-cavity surface-emitting lasers. [Thesis]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/97798
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
28.
Liu, Tao.
High-Frequency Self-Modulation in External-Cavity VCSELs : 外部共振器VCSELの高速自己変調; ガイブ キョウシンキ VCSEL ノ コウソク ジコ ヘンチョウ.
Degree: 博士(工学), Nara Institute of Science and Technology / 奈良先端科学技術大学院大学
URL: http://hdl.handle.net/10061/10457
Subjects/Keywords: External-cavity vertical-cavity surface-emitting laser
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APA ·
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APA (6th Edition):
Liu, T. (n.d.). High-Frequency Self-Modulation in External-Cavity VCSELs : 外部共振器VCSELの高速自己変調; ガイブ キョウシンキ VCSEL ノ コウソク ジコ ヘンチョウ. (Thesis). Nara Institute of Science and Technology / 奈良先端科学技術大学院大学. Retrieved from http://hdl.handle.net/10061/10457
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Liu, Tao. “High-Frequency Self-Modulation in External-Cavity VCSELs : 外部共振器VCSELの高速自己変調; ガイブ キョウシンキ VCSEL ノ コウソク ジコ ヘンチョウ.” Thesis, Nara Institute of Science and Technology / 奈良先端科学技術大学院大学. Accessed April 13, 2021.
http://hdl.handle.net/10061/10457.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Liu, Tao. “High-Frequency Self-Modulation in External-Cavity VCSELs : 外部共振器VCSELの高速自己変調; ガイブ キョウシンキ VCSEL ノ コウソク ジコ ヘンチョウ.” Web. 13 Apr 2021.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Vancouver:
Liu T. High-Frequency Self-Modulation in External-Cavity VCSELs : 外部共振器VCSELの高速自己変調; ガイブ キョウシンキ VCSEL ノ コウソク ジコ ヘンチョウ. [Internet] [Thesis]. Nara Institute of Science and Technology / 奈良先端科学技術大学院大学; [cited 2021 Apr 13].
Available from: http://hdl.handle.net/10061/10457.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
Council of Science Editors:
Liu T. High-Frequency Self-Modulation in External-Cavity VCSELs : 外部共振器VCSELの高速自己変調; ガイブ キョウシンキ VCSEL ノ コウソク ジコ ヘンチョウ. [Thesis]. Nara Institute of Science and Technology / 奈良先端科学技術大学院大学; Available from: http://hdl.handle.net/10061/10457
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
University of Michigan
29.
Gebretsadik, Herte.
Selectively oxidized patterned InP-based vertical-cavity surface-emitting lasers and VCSEL arrays.
Degree: PhD, Pure Sciences, 1999, University of Michigan
URL: http://hdl.handle.net/2027.42/131892
► It is possible to grow defect-free strained layers on patterned substrates (mesas or grooves) up to thicknesses far exceeding the critical thickness. Defect nucleation and…
(more)
▼ It is possible to grow defect-free strained layers on patterned substrates (mesas or grooves) up to thicknesses far exceeding the critical thickness. Defect nucleation and propagation are inhibited in such growth. This property was exploited to design, fabricate and characterize a novel 1.55mum InP-based patterned VCSEL with lattice-mismatched GaAs/AlGaAs top Distributed Bragg Reflectors (DBR), with defect density less than 10
4 cm
-2. TEM and photoluminescence studies were used to evaluate the optical quality of the grown material.
Lasers were designed and fabricated with InP/InGaAsP bottom mirrors, laterally oxidized InAlAs current confining layers, and a short-stack, high-contrast GaAs/Al
xO top DBR mirrors. 8 – 40mum diameter VCSELs have been characterized. A threshold current of 5mA is observed at 15°C for an 8mum diameter device; and up to 60muW of light output was recorded. The oxidation of InAlAs in InP-based heterostructures was studied for long wavelength VCSEL applications. The dependence on adjacent layer composition, thickness and doping were investigated. Several key contributions were made in this area, including: the characterization of the process at lower temperatures reduces substrate damage, observation of a dependence on adjacent layer composition resulting in the highest oxidation rate for InAlAs, and the first demonstration of an oxide-confined InP-based VCSEL. GaAs-based VCSEL arrays with AlGaAs/InGaAs active region for high power applications were designed and fabricated using a planar. Individual devices as well as arrays of varying size were characterized and operated with maximum conversion efficiencies of 5%. Good uniformity in threshold current and scalable power were obtained for a variety of arrays. 10 x 10 arrays, operating with 3.5% conversion efficiency, gave powers in excess of 60mW (limited by the current supply). The thermal crosstalk in 4 x 4 VCSEL arrays was also investigated. A thermal isolation of 2mW/K was recorded for devices separated by 50mum; and a conductivity is 0.057W/cm-K is extracted from the data. The ouput power of the
lasers is temperature-insensitive under constant voltage operation. The multi-transverse mode behavior of a 2 x 2 array was studied. We believe that spatial hole burning and non-uniform current injection are the mechanisms responsible for the multi-mode characteristic of the arrays.
Advisors/Committee Members: Bhattacharya, Pallab (advisor).
Subjects/Keywords: Aluminum Gallium Arsenide; Arrays; Arraysindium; Based; Indium Phosphide; Inp; Patterned; Selectively Oxidized; Vcsel; Vertical-cavity Surface-emitting Lasers
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APA (6th Edition):
Gebretsadik, H. (1999). Selectively oxidized patterned InP-based vertical-cavity surface-emitting lasers and VCSEL arrays. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/131892
Chicago Manual of Style (16th Edition):
Gebretsadik, Herte. “Selectively oxidized patterned InP-based vertical-cavity surface-emitting lasers and VCSEL arrays.” 1999. Doctoral Dissertation, University of Michigan. Accessed April 13, 2021.
http://hdl.handle.net/2027.42/131892.
MLA Handbook (7th Edition):
Gebretsadik, Herte. “Selectively oxidized patterned InP-based vertical-cavity surface-emitting lasers and VCSEL arrays.” 1999. Web. 13 Apr 2021.
Vancouver:
Gebretsadik H. Selectively oxidized patterned InP-based vertical-cavity surface-emitting lasers and VCSEL arrays. [Internet] [Doctoral dissertation]. University of Michigan; 1999. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2027.42/131892.
Council of Science Editors:
Gebretsadik H. Selectively oxidized patterned InP-based vertical-cavity surface-emitting lasers and VCSEL arrays. [Doctoral Dissertation]. University of Michigan; 1999. Available from: http://hdl.handle.net/2027.42/131892
30.
Tan, Meng Peun.
Modulation approaches of vertical-cavity surface-emitting lasers with mode control.
Degree: PhD, 1200, 2013, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/44254
► Vertical-cavity surface-emitting lasers (VCSELs) are currently the most popular light source for short-haul optical data communication primarily due to their low cost and low operating…
(more)
▼ Vertical-
cavity surface-
emitting lasers (VCSELs) are currently the most popular light source for short-haul optical data communication primarily due to their low cost and low operating power. To address the needs for improved data rate, power consumption, and device lifetime, various approaches of digital modulation utilizing VCSELs with modified structures for mode control are presented. Direct modulation of VCSELs with separate optical and current apertures enables high modulation bandwidth of greater than 18 GHz operating single mode at low current density of less than 6 kA/cm2 because the current aperture diameter can be increased independent of the optical apertures. Polarization modulation of anisotropic VCSELs gives an extinction ratio of greater than 9 dB and at the same time requires low modulation amplitude of less than 200 mV, due to the orthogonality of the polarization states. To achieve polarization modulation requires the capabilities of polarization control and polarization switching. Finally, electro-optically modulated VCSELs with isolated
cavity and modulator sections are shown to have the potential of digital modulation with a high data rate at low bias current. Design and fabrication of these VCSELs along with their characterization results will be presented, and approaches to improve their performance will also be suggested.
Advisors/Committee Members: Choquette, Kent D. (advisor), Choquette, Kent D. (Committee Chair), Goddard, Lynford L. (committee member), Ravaioli, Umberto (committee member), Schutt-Ainé, José E. (committee member).
Subjects/Keywords: Vertical-cavity surface-emitting lasers; photonic crystal; optical communication; transverse mode; polarization; electro-optic modulation
…tapered oxide-aperture
vertical-cavity surface-emitting lasers,” IEEE Journal on Selected Topics… …tunnel junction vertical-cavity surface-emitting lasers,”
IEEE Photonics Technology Letters… …speed vertical
cavity surface emitting lasers,” in Proceedings of SPIE, vol. 6484, pp. 64840J… …digital alloy interfaces for
lower resistance vertical-cavity surface-emitting lasers,” Applied… …Schneider, Jr., “Uniparabolic mirror grading for vertical
cavity surface emitting lasers,” Applied…
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tan, M. P. (2013). Modulation approaches of vertical-cavity surface-emitting lasers with mode control. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/44254
Chicago Manual of Style (16th Edition):
Tan, Meng Peun. “Modulation approaches of vertical-cavity surface-emitting lasers with mode control.” 2013. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 13, 2021.
http://hdl.handle.net/2142/44254.
MLA Handbook (7th Edition):
Tan, Meng Peun. “Modulation approaches of vertical-cavity surface-emitting lasers with mode control.” 2013. Web. 13 Apr 2021.
Vancouver:
Tan MP. Modulation approaches of vertical-cavity surface-emitting lasers with mode control. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2013. [cited 2021 Apr 13].
Available from: http://hdl.handle.net/2142/44254.
Council of Science Editors:
Tan MP. Modulation approaches of vertical-cavity surface-emitting lasers with mode control. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2013. Available from: http://hdl.handle.net/2142/44254
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