subject:(optics)

University of Rochester

1. DeSantis, Zachary J. Image Reconstruction for Interferometric Imaging of Geosynchronous Satellites.

Degree: 2017, University of Rochester

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10623793

► Imaging distant objects at a high resolution has always presented a challenge due to the diffraction limit. Larger apertures improve the resolution, but at… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

DeSantis, Z. J. (2017). Image Reconstruction for Interferometric Imaging of Geosynchronous Satellites. (Thesis). University of Rochester. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10623793

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

DeSantis, Zachary J. “Image Reconstruction for Interferometric Imaging of Geosynchronous Satellites.” 2017. Thesis, University of Rochester. Accessed March 01, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10623793.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

DeSantis, Zachary J. “Image Reconstruction for Interferometric Imaging of Geosynchronous Satellites.” 2017. Web. 01 Mar 2021.

Vancouver:

DeSantis ZJ. Image Reconstruction for Interferometric Imaging of Geosynchronous Satellites. [Internet] [Thesis]. University of Rochester; 2017. [cited 2021 Mar 01]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10623793.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

DeSantis ZJ. Image Reconstruction for Interferometric Imaging of Geosynchronous Satellites. [Thesis]. University of Rochester; 2017. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10623793

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Stahl, Charlotte Susan Dulaney. Vortices in Coherent and Partially Coherent Optical Beams.

Degree: 2018, The University of North Carolina at Charlotte

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10788087

► Vortices in optical beams have been the subject of extensive study since their status as a generic feature of light was established. They have… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Stahl, C. S. D. (2018). Vortices in Coherent and Partially Coherent Optical Beams. (Thesis). The University of North Carolina at Charlotte. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10788087

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Stahl, Charlotte Susan Dulaney. “Vortices in Coherent and Partially Coherent Optical Beams.” 2018. Thesis, The University of North Carolina at Charlotte. Accessed March 01, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10788087.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Stahl, Charlotte Susan Dulaney. “Vortices in Coherent and Partially Coherent Optical Beams.” 2018. Web. 01 Mar 2021.

Vancouver:

Stahl CSD. Vortices in Coherent and Partially Coherent Optical Beams. [Internet] [Thesis]. The University of North Carolina at Charlotte; 2018. [cited 2021 Mar 01]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10788087.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Stahl CSD. Vortices in Coherent and Partially Coherent Optical Beams. [Thesis]. The University of North Carolina at Charlotte; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10788087

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Irvine

3. Zhang, Mengke. In vitro rabbit trachea imaging using long-range optical coherence tomography.

Degree: Biomedical Engineering, 2016, University of California – Irvine

URL: http://www.escholarship.org/uc/item/57k2h9kt

► Diagnostic imaging of the trachea can help in identifying a variety of intrinsic and extrinsic abnormalities of the trachea. Imaging diagnosis of trachea has been… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhang, M. (2016). In vitro rabbit trachea imaging using long-range optical coherence tomography. (Thesis). University of California – Irvine. Retrieved from http://www.escholarship.org/uc/item/57k2h9kt

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhang, Mengke. “In vitro rabbit trachea imaging using long-range optical coherence tomography.” 2016. Thesis, University of California – Irvine. Accessed March 01, 2021. http://www.escholarship.org/uc/item/57k2h9kt.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhang, Mengke. “In vitro rabbit trachea imaging using long-range optical coherence tomography.” 2016. Web. 01 Mar 2021.

Vancouver:

Zhang M. In vitro rabbit trachea imaging using long-range optical coherence tomography. [Internet] [Thesis]. University of California – Irvine; 2016. [cited 2021 Mar 01]. Available from: http://www.escholarship.org/uc/item/57k2h9kt.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhang M. In vitro rabbit trachea imaging using long-range optical coherence tomography. [Thesis]. University of California – Irvine; 2016. Available from: http://www.escholarship.org/uc/item/57k2h9kt

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

The University of Arizona

4. Mart, Cody W. Characterization and Power Scaling of Beam-Combinable Ytterbium-Doped Microstructured Fiber Amplifier.

Degree: 2017, The University of Arizona

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10621184

► In this dissertation, high-power ytterbium-doped fiber amplifiers designed with advanced waveguide concepts are characterized and power scaled. Fiber waveguides utilizing cladding microstructures to achieve… (more)

▼ In this dissertation, high-power ytterbium-doped fiber amplifiers designed with advanced waveguide concepts are characterized and power scaled. Fiber waveguides utilizing cladding microstructures to achieve wave guidance via the photonic bandgap (PBG) effect and a combination of PBG and modified total internal reflection (MTIR) have been proposed as viable single-mode waveguides. Such novel structures allow larger core diameters (>35 ?m diameters) than conventional step-index fibers while still maintaining near-diffraction limited beam quality. These microstructured fibers are demonstrated as robust single-mode waveguides at low powers and are power scaled to realize the thermal power limits of the structure. Here above a certain power threshold, these coiled few-mode fibers have been shown to be limited by modal instability (MI); where energy is dynamically transferred between the fundamental mode and higher-order modes. Nonlinear effects such as stimulated Brillouin scattering (SBS) are also studied in these fiber waveguides as part of this dissertation. Suppressing SBS is critical towards achieving narrow optical bandwidths (linewidths) necessary for efficient fiber amplifier beam combining. Towards that end, new effects that favorably reduce acoustic wave dispersion to increase the SBS threshold are discovered and reported. The first advanced waveguide examined is a Yb-doped 50/400 μm diameter core/clad PBGF. The PBGF is power scaled with a single-frequency 1064 nm seed to an MI-limited 410 W with 79% optical-to-optical efficiency and near-diffraction limited beam quality (M-Squared < 1.25) before MI onset. To this author’s knowledge, this represents 2.4x improvement in power output from a PBGF amplifier without consideration for linewidth and a 16x improvement in single-frequency power output from a PBGF amplifier. During power scaling of the PBGF, a remarkably low Brillouin response was elicited from the fiber even when the ultra large diameter 50 μm core is accounted for in the SBS threshold equation. Subsequent interrogation of the Brillouin response in a pump probe Brillouin gain spectrum diagnostic estimated a Brillouin gain coefficient, gB, of 0.62E^-11 m/W; which is 4x reduced from standard silica-based fiber. A finite element numerical model that solves the inhomogenous Helmholtz equation that governs the acoustic and optical coupling in SBS is utilized to verify experimental results with an estimated gB = 0.68E^-11 m/W. Consequently, a novel SBS-suppression mechanism based on inclusion of sub-optical wavelength acoustic features in the core is proposed. The second advanced waveguide analyzed is a 35/350 μm diameter core/clad fiber that achieved wave guidance via both PBG and MTIR, and is referred to as a hybrid fiber. The waveguide benefits mutually from the amenable properties of PBG and MTIR wave guidance because robust single-mode propagation with minimal confinement loss is assured due to MTIR effects, and the waveguide…

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mart, C. W. (2017). Characterization and Power Scaling of Beam-Combinable Ytterbium-Doped Microstructured Fiber Amplifier. (Thesis). The University of Arizona. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10621184

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mart, Cody W. “Characterization and Power Scaling of Beam-Combinable Ytterbium-Doped Microstructured Fiber Amplifier.” 2017. Thesis, The University of Arizona. Accessed March 01, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10621184.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mart, Cody W. “Characterization and Power Scaling of Beam-Combinable Ytterbium-Doped Microstructured Fiber Amplifier.” 2017. Web. 01 Mar 2021.

Vancouver:

Mart CW. Characterization and Power Scaling of Beam-Combinable Ytterbium-Doped Microstructured Fiber Amplifier. [Internet] [Thesis]. The University of Arizona; 2017. [cited 2021 Mar 01]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10621184.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mart CW. Characterization and Power Scaling of Beam-Combinable Ytterbium-Doped Microstructured Fiber Amplifier. [Thesis]. The University of Arizona; 2017. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10621184

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

5. Gentry, Cale Michael. Scalable Quantum Light Sources in Silicon Photonic Circuits.

Degree: 2018, University of Colorado at Boulder

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10791965

► Chip-scale integrated photonic circuits provide an attractive platform for the implementation of many quantum photonic technologies ranging from precise metrology to secure communication and… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gentry, C. M. (2018). Scalable Quantum Light Sources in Silicon Photonic Circuits. (Thesis). University of Colorado at Boulder. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10791965

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gentry, Cale Michael. “Scalable Quantum Light Sources in Silicon Photonic Circuits.” 2018. Thesis, University of Colorado at Boulder. Accessed March 01, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10791965.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gentry, Cale Michael. “Scalable Quantum Light Sources in Silicon Photonic Circuits.” 2018. Web. 01 Mar 2021.

Vancouver:

Gentry CM. Scalable Quantum Light Sources in Silicon Photonic Circuits. [Internet] [Thesis]. University of Colorado at Boulder; 2018. [cited 2021 Mar 01]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10791965.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gentry CM. Scalable Quantum Light Sources in Silicon Photonic Circuits. [Thesis]. University of Colorado at Boulder; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10791965

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cornell University

6. Liu, Zhanwei. FEMTOSECOND PULSE GENERATION IN FIBER OSCILLATORS AND PULSE PROPAGATION IN MULTIMODE FIBER.

Degree: PhD, Applied Physics, 2017, Cornell University

URL: http://hdl.handle.net/1813/56828

► Ultrafast optical pulses have been widely used in fundamental research, medical and industrial applications. For example, ultrafast lasers are used for chemistry, optical frequency metrology,… (more)

▼ Ultrafast optical pulses have been widely used in fundamental research, medical and industrial applications. For example, ultrafast lasers are used for chemistry, optical frequency metrology, terahertz generation, spectroscopy, multi-photon microscopy, optical coherence tomography, and micro-machining, etc. Traditionally, solid-state lasers, which have been engineered for over 30 years, dominate the market. Fiber lasers, as their competitors, offer several advantages over the solid-state systems: compact size, excellent thermal management, high efficiency, diffraction-limited spatial quality and low cost. Therefore, fiber lasers are becoming more popular on the continuous-wave laser market. For pulsed operation, large net nonlinear effects due to the tight confinement of the light in the core and the long propagation distance have limited their performance. As a result, the performance of pulsed fiber lasers has lagged behind that of their solid-state counterparts. In addition, product-scale adoption of high-performance ultrafast fiber lasers in industrial application is hindered by the lack of environmental-stability. This thesis focuses on the study of pulse propagation in fiber oscillators and multimode fibers, which aims to solve the above problems. An environmentally-stable fiber laser source based on cascaded Mamyshev regeneration and the formation of parabolic pulses, which allows for at least an order of magnitude increase in peak power and 6-fold increase in nonlinear phase accumulation, is demonstrated experimentally. The outstanding performance, which is ~ 50 nJ and ~ 40 fs, has also been boosted up to the comparable level as that of the Ti:sapphire lasers. In addition, The combination of excellent performance with the environmental stability make the Mamyshev oscillator extremely attractive for applications. To further improve the laser performance, multimode fibers, which can offer much larger mode field diameter and complex spatio-temporal couplings, are studied. Remarkable phenomena such as beam clean-up and self-organized instability in graded-index multimode fibers are observed and explained. Understanding the pulse propagation in those complex systems provides a route to further energy scaling. This thesis is not just limited to the generation of high-energy, short-duration, coherent pulses. It also covers interesting nonlinear dynamics such as extreme events in the all-normal dispersion fiber oscillators. This may attract attention from researchers in nonlinear systems and oceanography. Finally, future directions are discussed. Advisors/Committee Members: Wise, Frank William (chair), Moses, Jeffrey (committee member), Chen, Tsuhan (committee member).

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Liu, Z. (2017). FEMTOSECOND PULSE GENERATION IN FIBER OSCILLATORS AND PULSE PROPAGATION IN MULTIMODE FIBER. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/56828

Chicago Manual of Style (16^th Edition):

Liu, Zhanwei. “FEMTOSECOND PULSE GENERATION IN FIBER OSCILLATORS AND PULSE PROPAGATION IN MULTIMODE FIBER.” 2017. Doctoral Dissertation, Cornell University. Accessed March 01, 2021. http://hdl.handle.net/1813/56828.

MLA Handbook (7^th Edition):

Liu, Zhanwei. “FEMTOSECOND PULSE GENERATION IN FIBER OSCILLATORS AND PULSE PROPAGATION IN MULTIMODE FIBER.” 2017. Web. 01 Mar 2021.

Vancouver:

Liu Z. FEMTOSECOND PULSE GENERATION IN FIBER OSCILLATORS AND PULSE PROPAGATION IN MULTIMODE FIBER. [Internet] [Doctoral dissertation]. Cornell University; 2017. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1813/56828.

Council of Science Editors:

Liu Z. FEMTOSECOND PULSE GENERATION IN FIBER OSCILLATORS AND PULSE PROPAGATION IN MULTIMODE FIBER. [Doctoral Dissertation]. Cornell University; 2017. Available from: http://hdl.handle.net/1813/56828

7. Oller, Declan Danesh. Anodic alumina as a scalable platform for structural coloration and optical rectification.

Degree: Department of Physics, 2017, Brown University

URL: https://repository.library.brown.edu/studio/item/bdr:792623/

► Anodized aluminum oxide (AAO) is an interesting material, occupying a unique space – already used incredibly widely in the world, yet also commonly used for… (more)

▼ Anodized aluminum oxide (AAO) is an interesting material, occupying a unique space – already used incredibly widely in the world, yet also commonly used for nanoscience research. However, the wealth of scientific research using it has yet to make it to the real world. Similarly, many nanoscience fields that have produced incredible results on a small scale haven’t found practical use. In this dissertation, we investigate scalable applications of AAO in two fields, and then look at their potential intersection. First, we look at its use as a scalable structural coloration platform, employing a Fabry-Perot optical cavity structure that has seen a research resurgence in recent years. Structural coloration presents the potential for a more tunable, durable, and environmentally friendly coloration system than traditional methods, though it can also be used in concert with them. We present tools to analyze the full capabilities of this structure for its future use in structural coloration as a “color by design” platform and verify them with experimental probes of fabricated samples. Further, we look to mitigate assumed limitations of this system, such as sensitivity to fabrication parameters and angular dependence. Then, we present another achievement of AAO as a scalable platform: the dielectric of a Ag-AAO-Al resistive switching (RS) system used for optical rectification (OR). RS is a well researched field, but almost entirely in the electronic context, being the first realization of the memristor. OR is a promising field with potential for energy harvesting and ultrafast light sensing that has seen a resurgence in recent years, but all published methods are either highly unrepeatable or rely on advanced nanofabrication techniques. We demonstrate an intersection of the RS field, used to create a unique OR platform that offers scalability and tunability beyond any that have been reported. We investigate the electronic effects, temperature dependence, and then present possible OR effects. Lastly, we present some potential combinations of these two projects. Advisors/Committee Members: Xu, Jimmy (Advisor), Valles, James (Reader), Mitrovic, Vesna (Reader).

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Oller, D. D. (2017). Anodic alumina as a scalable platform for structural coloration and optical rectification. (Thesis). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:792623/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Oller, Declan Danesh. “Anodic alumina as a scalable platform for structural coloration and optical rectification.” 2017. Thesis, Brown University. Accessed March 01, 2021. https://repository.library.brown.edu/studio/item/bdr:792623/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Oller, Declan Danesh. “Anodic alumina as a scalable platform for structural coloration and optical rectification.” 2017. Web. 01 Mar 2021.

Vancouver:

Oller DD. Anodic alumina as a scalable platform for structural coloration and optical rectification. [Internet] [Thesis]. Brown University; 2017. [cited 2021 Mar 01]. Available from: https://repository.library.brown.edu/studio/item/bdr:792623/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Oller DD. Anodic alumina as a scalable platform for structural coloration and optical rectification. [Thesis]. Brown University; 2017. Available from: https://repository.library.brown.edu/studio/item/bdr:792623/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

UCLA

8. Daloglu, Mustafa Ugur. Wide-field Imaging and Tracking in 3D Using Computational On-Chip Microscopy.

Degree: Electrical Engineering, 2018, UCLA

URL: http://www.escholarship.org/uc/item/2pp1j8x8

► On-chip microscopy is a powerful technique for high-throughput 3D microswimmer tracking and wide-field nanoparticle/biomolecule imaging, as it does not suffer from the limitations of its… (more)

▼ On-chip microscopy is a powerful technique for high-throughput 3D microswimmer tracking and wide-field nanoparticle/biomolecule imaging, as it does not suffer from the limitations of its lens-based counterparts. Due to the simple geometry where the sample is placed very close to the sensor chip without any imaging lenses in between, the field-of-view (FOV) is decoupled from the spatial resolution and is equal to the area of the sensor chip. Illuminated by a partially-coherent or coherent light source, volumetric information from the sample is recorded as interference patterns on the sensor, which is digitally reconstructed to extract the amplitude and phase information of the target objects. We further improve the capabilities of this unique imaging modality, enabling it to reach new frontiers in 3D sperm tracking and nanoparticle/biomolecule imaging. First, we enabled the on-chip imaging platform to track the 3D flagellar motion of bovine sperm cells along with the head spin, in addition to the 3D translational motion of the sperm head, by significantly increasing the frame capture rate and the sensitivity. We have quantified >2,100 bovine sperm trajectories in 3D, with the associated flagellar beating patterns, the head spin axis and velocity. We provide, for the first time, the perspective of an observer that is seated at the moving and spinning sperm head. We further use this platform to track and comparatively analyze the full 3D locomotion of sex-sorted bovine sperms, investigating the differences in the kinematics between the two sperm populations carrying the opposite sex chromosomes. Second, we improve the nanoparticle detection limit of our platform by using a shorter illumination wavelength in the middle ultraviolet range (266 nm) to increase the forward scattering, which enabled us to detect individual sub-30 nm nanoparticles. This short wavelength has also allowed us to image biomolecules (e.g. protein aggregates) with increased contrast, due to the high absorption specific to the UV wavelengths. We further investigate a UV-LED based, low-cost and portable version of this platform to image protein crystals in high-contrast and to distinguish them from salt crystals, as a potential alternative to the lens-based platforms used by protein crystallographers.

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Daloglu, M. U. (2018). Wide-field Imaging and Tracking in 3D Using Computational On-Chip Microscopy. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/2pp1j8x8

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Daloglu, Mustafa Ugur. “Wide-field Imaging and Tracking in 3D Using Computational On-Chip Microscopy.” 2018. Thesis, UCLA. Accessed March 01, 2021. http://www.escholarship.org/uc/item/2pp1j8x8.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Daloglu, Mustafa Ugur. “Wide-field Imaging and Tracking in 3D Using Computational On-Chip Microscopy.” 2018. Web. 01 Mar 2021.

Vancouver:

Daloglu MU. Wide-field Imaging and Tracking in 3D Using Computational On-Chip Microscopy. [Internet] [Thesis]. UCLA; 2018. [cited 2021 Mar 01]. Available from: http://www.escholarship.org/uc/item/2pp1j8x8.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Daloglu MU. Wide-field Imaging and Tracking in 3D Using Computational On-Chip Microscopy. [Thesis]. UCLA; 2018. Available from: http://www.escholarship.org/uc/item/2pp1j8x8

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – San Diego

9. Obheroi, Sonika. Ultracompact Computational Spectroscopy and Hyperspectral Imaging.

Degree: Electrical Engineering (Photonics), 2018, University of California – San Diego

URL: http://www.escholarship.org/uc/item/6cx2x9jr

► Spectroscopy is a salient practice for the identification and measurement of matter, but typical spectrometers are limited in both scope and efficiency with the current… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Obheroi, S. (2018). Ultracompact Computational Spectroscopy and Hyperspectral Imaging. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/6cx2x9jr

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Obheroi, Sonika. “Ultracompact Computational Spectroscopy and Hyperspectral Imaging.” 2018. Thesis, University of California – San Diego. Accessed March 01, 2021. http://www.escholarship.org/uc/item/6cx2x9jr.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Obheroi, Sonika. “Ultracompact Computational Spectroscopy and Hyperspectral Imaging.” 2018. Web. 01 Mar 2021.

Vancouver:

Obheroi S. Ultracompact Computational Spectroscopy and Hyperspectral Imaging. [Internet] [Thesis]. University of California – San Diego; 2018. [cited 2021 Mar 01]. Available from: http://www.escholarship.org/uc/item/6cx2x9jr.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Obheroi S. Ultracompact Computational Spectroscopy and Hyperspectral Imaging. [Thesis]. University of California – San Diego; 2018. Available from: http://www.escholarship.org/uc/item/6cx2x9jr

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Wilfrid Laurier University

10. Khattak, Anum. Plasmonic Slab Waveguides: Theory & Application for Sensors.

Degree: 2020, Wilfrid Laurier University

URL: https://scholars.wlu.ca/etd/2280

► Through surface plasmon polaritons (SPPs) that propagate along the interface between a metal and a dielectric material, plasmonic waveguides have the ability to confine light… (more)

▼ Through surface plasmon polaritons (SPPs) that propagate along the interface between a metal and a dielectric material, plasmonic waveguides have the ability to confine light at subwavelength scale beyond the diffraction limit, which opens a promising platform to further downsize the active and passive photonic devices. The fields of the SPPs have maximum amplitude at the metal/dielectric interface and decay exponentially toward both media, where the penetration of the fields in the dielectric is very susceptible to the change in the refractive index of the dielectric. This makes surface plasmon resonance (SPR) a remarkable technique in sensor applications to investigate the medium near interface by exploiting the method of attenuated total reflection (ATR) to excite the SPP mode in plasmonic waveguides. In conventional SPR sensors, the most commonly used is Kretschmann’s configuration. The optical resonance of the ATR curve in Kretschmann’s configuration has been recognized from the excitation of the SPP mode supported by a two-layer (metal/dielectric) structure with the effective index of the SPP given by, where andare the permittivity of the metal and sensing medium. This has not been accurately interpreted because the coupling layer prism is not considered. On the other hand, conventional three-layer Kretschmann configuration based sensors exhibit very broad ATR lineshape resulting in poor performance of sensitivity. By using multilayer plasmonic waveguide structures, the sensitivities of SPR based sensors could be significantly enhanced. Thus, it is very important to study the SPP modes in plasmonic waveguides, which provides an insight into the origin of the optical resonance in the ATR curve and also facilitates the design of multilayer plasmonic waveguides for ultrasensitive SPR based sensor applications. In this thesis, we theoretically study the SPP modes supported by three- and four-layer asymmetric plasmonic waveguides with taking account of the high-index prism layer. The dispersion equations for three- and four-layer plasmonic waveguides are derived, which are used to characterize the SPP modes, supported by three-layer symmetric and asymmetric, and four-layer asymmetric plasmonic waveguides. With the derived dispersion equations, we have analyzed the modal index and the propagation length for different plasmonic waveguides. The profiles of the electric and magnetic fields have been visualized by using COMSOL Multiphysics software. To explore the origin of the optical resonance in SPR sensors associated with the SPP mode excited in plasmonic waveguides, the ATR spectra of asymmetric three-layer Kretschmann configuration, and asymmetric four-layer plasmonic waveguides are investigated. Our results show that there are optimum thicknesses for the metal and the dielectric layer with the strongest optical resonance in ATR curves, which could be determined from the analysis of the SPP modes. We also propose an ultrasensitive SPR sensor based on a multilayer plasmonic structure to generate Fano resonance in…

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Khattak, A. (2020). Plasmonic Slab Waveguides: Theory & Application for Sensors. (Thesis). Wilfrid Laurier University. Retrieved from https://scholars.wlu.ca/etd/2280

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Khattak, Anum. “Plasmonic Slab Waveguides: Theory & Application for Sensors.” 2020. Thesis, Wilfrid Laurier University. Accessed March 01, 2021. https://scholars.wlu.ca/etd/2280.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Khattak, Anum. “Plasmonic Slab Waveguides: Theory & Application for Sensors.” 2020. Web. 01 Mar 2021.

Vancouver:

Khattak A. Plasmonic Slab Waveguides: Theory & Application for Sensors. [Internet] [Thesis]. Wilfrid Laurier University; 2020. [cited 2021 Mar 01]. Available from: https://scholars.wlu.ca/etd/2280.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Khattak A. Plasmonic Slab Waveguides: Theory & Application for Sensors. [Thesis]. Wilfrid Laurier University; 2020. Available from: https://scholars.wlu.ca/etd/2280

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Boston University

11. Gregg, Patrick Clayton. Optical angular momentum in air core fibers.

Degree: PhD, Electrical & Computer Engineering, 2017, Boston University

URL: http://hdl.handle.net/2144/20841

► As data consumption continues to grow, the backbone of the internet, comprising single mode fiber (SMF)-based infrastructure, is fundamentally limited by nonlinear optical effects. One… (more)

▼ As data consumption continues to grow, the backbone of the internet, comprising single mode fiber (SMF)-based infrastructure, is fundamentally limited by nonlinear optical effects. One strategy to address this bottleneck, space division multiplexing (SDM), utilizes multiple modes in a single fiber as independent data channels. Orbital Angular Momentum (OAM) carrying modes, which have twisting phase fronts tracing out helices as the beams propagate, have recently received tremendous attention as a means of achieving low-crosstalk, digital signal processing (DSP)-free transmission with enhanced capacity. Terabit-scale transmission using 4 OAM modes over 1.1km has been demonstrated, but questions remain – how many OAM modes can fibers support, and how stable is propagation over longer lengths? In this thesis, we investigate angular momentum carrying modes in a novel class of fibers featuring an air core. We find that high-order OAM states, although arising in degenerate pairs, counterintuitively resist mode coupling due to OAM conservation, pointing to a unique stability inherent to OAM modes in fibers. We achieve OAM propagation up to 13.4km lengths, and achieve mode purities greater than 15dB at data-center length-scales. We use these fibers to transmit wavelength-division multiplexed data with 25 GHz channel spacing, 10 GBaud rates and quadrature-phase-shift keyed modulation formats in 12 modes simultaneously, over 1.2km, and over a large number of wavelengths across the C-band (1530-1565nm). However, transmission over every mode in every channel of the C-band was prevented by the accidental degeneracy of OAM states with undesired modes. To achieve a larger ensemble of stable modes over a larger wavelength range, we study new fiber designs that avoid this accidental degeneracy problem. We find that the most scalable modal eigenbasis is a set of states that carry non-integer amounts of average OAM, also called spin-orbit coupled modes in analogy with similar effects observed in atomic physics. We demonstrate excitation and transmission of 24 such modes over device lengths (10m). The achievement of a record number of uncoupled modes in fibers confirms the viability of angular momentum states as data carriers, and potential applications include links in data centers, high capacity optical amplifiers, and quantum communications links.

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gregg, P. C. (2017). Optical angular momentum in air core fibers. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/20841

Chicago Manual of Style (16^th Edition):

Gregg, Patrick Clayton. “Optical angular momentum in air core fibers.” 2017. Doctoral Dissertation, Boston University. Accessed March 01, 2021. http://hdl.handle.net/2144/20841.

MLA Handbook (7^th Edition):

Gregg, Patrick Clayton. “Optical angular momentum in air core fibers.” 2017. Web. 01 Mar 2021.

Vancouver:

Gregg PC. Optical angular momentum in air core fibers. [Internet] [Doctoral dissertation]. Boston University; 2017. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2144/20841.

Council of Science Editors:

Gregg PC. Optical angular momentum in air core fibers. [Doctoral Dissertation]. Boston University; 2017. Available from: http://hdl.handle.net/2144/20841

Boston University

12. Prabhakar, Gautam. Stimulated Brillouin scattering in angular momentum carrying states of optical fibers.

Degree: PhD, Electrical & Computer Engineering, 2019, Boston University

URL: http://hdl.handle.net/2144/38520

► Brillouin scattering is a nonlinear optical process via which light waves or photons scatter from density fluctuations or acoustic phonons in a medium to generate… (more)

▼ Brillouin scattering is a nonlinear optical process via which light waves or photons scatter from density fluctuations or acoustic phonons in a medium to generate new optical fields. At sufficient optical intensities, the incident and scattered optical fields interfere to generate density fields, such that the acoustic and scattered light fields reinforce each other’s growth, thereby resulting in stimulated Brillouin scattering (SBS). The scattered light due to SBS is typically frequency-downshifted or Stokes-shifted in the counter-propagating direction to the incident light, due to the linear momentum and energy conservation requirements between light and the available acoustic phonons in most media. SBS is of both fundamental and technological importance since on one hand, it sheds light on the light-matter interactions at the quantum level as well as on the mechanical properties of matter, on the other hand, it has found utility in a variety of applications such as distributed sensing, signal processing, beam combination via phase conjugation and optical storage by slowing down light. In addition, SBS is an important consideration for long-haul fiber communication networks as well as high-power single frequency lasers since it can limit the amount of transmitted optical power through a medium. The primary means to tailor SBS interactions till now have involved designing guided-wave and resonator structures to control and alter the waveguiding properties of both light and sound fields, as well as the overlap between them. Such waveguide designs have led to the demonstration of several distinctive properties such as SBS gain suppression, anti-Stokes cooling and forward SBS, to name a few. In this thesis, we show that controlling the angular momentum (AM) of light and sound yields an entirely new toolbox with which to tailor SBS. In light fields, angular momentum can result from helical phase or orbital angular momentum (OAM) as well as from circular polarization or spin angular momentum (SAM), whereas in sound fields, only OAM exists. OAM states, in particular, have received tremendous attention in the past couple of decades due to the new degree of freedom afforded by the existence of theoretically infinite number of states encoded in their helicity. More recently, interaction between SAM and OAM, termed spin-orbit coupling, which is observed only in confined geometries such as waveguides, has received enormous interest on account of the remarkable phenomena enabled by such interactions, such as optical super-resolution and spin-Hall effects. Here, we demonstrate that SBS of AM-carrying light in waveguides such as optical fibers, where light experiences the above-mentioned spin-orbit coupling, results in unique acousto-optic interactions. For light fields with the same helical charge; hence the same effective area that usually controls the strength of the nonlinear interaction, we show that different combinations of the signs of OAM and SAM results in dramatically different behavior due to the… Advisors/Committee Members: Ramachandran, Siddharth (advisor).

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Prabhakar, G. (2019). Stimulated Brillouin scattering in angular momentum carrying states of optical fibers. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/38520

Chicago Manual of Style (16^th Edition):

Prabhakar, Gautam. “Stimulated Brillouin scattering in angular momentum carrying states of optical fibers.” 2019. Doctoral Dissertation, Boston University. Accessed March 01, 2021. http://hdl.handle.net/2144/38520.

MLA Handbook (7^th Edition):

Prabhakar, Gautam. “Stimulated Brillouin scattering in angular momentum carrying states of optical fibers.” 2019. Web. 01 Mar 2021.

Vancouver:

Prabhakar G. Stimulated Brillouin scattering in angular momentum carrying states of optical fibers. [Internet] [Doctoral dissertation]. Boston University; 2019. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2144/38520.

Council of Science Editors:

Prabhakar G. Stimulated Brillouin scattering in angular momentum carrying states of optical fibers. [Doctoral Dissertation]. Boston University; 2019. Available from: http://hdl.handle.net/2144/38520

University of Colorado

13. Bodine, Martha Ingeborg. Superresolved Swept-Wavelength Interferometry: Fundamental Limits and Use in Three-Dimensional Surface Characterization.

Degree: PhD, 2017, University of Colorado

URL: https://scholar.colorado.edu/eeng_gradetds/23

► The high signal-to-noise ratios typical of swept-wavelength interferometry (SWI) enable distance measurements to be superresolved with theoretical 2σ uncertainties as low as 1E−4 of… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bodine, M. I. (2017). Superresolved Swept-Wavelength Interferometry: Fundamental Limits and Use in Three-Dimensional Surface Characterization. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/eeng_gradetds/23

Chicago Manual of Style (16^th Edition):

Bodine, Martha Ingeborg. “Superresolved Swept-Wavelength Interferometry: Fundamental Limits and Use in Three-Dimensional Surface Characterization.” 2017. Doctoral Dissertation, University of Colorado. Accessed March 01, 2021. https://scholar.colorado.edu/eeng_gradetds/23.

MLA Handbook (7^th Edition):

Bodine, Martha Ingeborg. “Superresolved Swept-Wavelength Interferometry: Fundamental Limits and Use in Three-Dimensional Surface Characterization.” 2017. Web. 01 Mar 2021.

Vancouver:

Bodine MI. Superresolved Swept-Wavelength Interferometry: Fundamental Limits and Use in Three-Dimensional Surface Characterization. [Internet] [Doctoral dissertation]. University of Colorado; 2017. [cited 2021 Mar 01]. Available from: https://scholar.colorado.edu/eeng_gradetds/23.

Council of Science Editors:

Bodine MI. Superresolved Swept-Wavelength Interferometry: Fundamental Limits and Use in Three-Dimensional Surface Characterization. [Doctoral Dissertation]. University of Colorado; 2017. Available from: https://scholar.colorado.edu/eeng_gradetds/23

Boston University

14. Xiao, Sheng. Strategies for contrast improvement in optical microscopy.

Degree: PhD, Electrical & Computer Engineering, 2019, Boston University

URL: http://hdl.handle.net/2144/38516

► Optical microscopy is an indispensable tool in biomedical laboratories since it is minimum invasive and can provide high spatiotemporal resolution when imaging biological tissues and… (more)

▼ Optical microscopy is an indispensable tool in biomedical laboratories since it is minimum invasive and can provide high spatiotemporal resolution when imaging biological tissues and organisms. However, recent advancements in biological and neurological sciences impose new challenges on optical microscopes, where one wants to image over extended volumes at high speeds, or deep inside scattering tissues. Conventional wide-field fluorescence microscopy (WFM) is able to image a 2D field-of-view at high speeds, but suffers from degrading contrast due to out-of-focus fluorescence. Two-photon microscopy can image deep inside scattering tissue compared to WFM, but the maximum attainable penetration depth is still limited by signal contrast. The presence of tissue scattering also incurs inaccuracy in point spread function (PSF) estimation, which is critical in deconvolution microscopy for contrast enhancement. In chapter 2 we describe a widefield-based extended depth-of-field (EDOF) fluorescence microscopy for high-speed high-contrast volumetric imaging. The system makes use of a digital micromirror device (DMD) to target illumination only on in-focus sample features within the imaging volume, significantly reducing the out-of-focus fluorescent background that plagues the typical widefield, and particularly EDOF, microscopes. This technique greatly enhances the image contrast and signal-to-noise ratio, while reducing the light dosage delivered to the sample. Image quality is further improved by the application of a robust deconvolution algorithm. These advantages are demonstrated for in vivo calcium imaging in the mouse brain. In chapter 3 we describe a variant of two-photon microscopy for high contrast imaging in deep tissue. The technique is based on the previously proposed differential aberration imaging (DAI) strategy where image contrast is enhanced by subtracting an aberrated image from an unaberrated one. This technique, though simple and effective, compromises imaging speed because two images must be taken sequentially. A new strategy for two-photon DAI based on near-instantaneous temporal multiplexing is proposed here, enabling high-speed imaging with pixel rates limited only by fluorescence lifetime and laser repetition rate. It can be implemented with standard two-photon microscopes since it does not require active optical elements and it is based on a synchronized sampling strategy that does not require specialized hardware. The resultant contrast improvement is demonstrated by imaging fluorescently-labeled mouse brain at video-rate. In chapter 4 we describe a theoretical model for imaging fluorescent objects embedded inside scattering medium. The model provides a simple analytical solution for estimating PSF within the forward scattering limit, which can be used for contrast improvement in deconvolution microscopy. We verify the results using Monte Carlo simulation. We also apply the model to a partitioned aperture detection system, demonstrate both theoretically and experimentally that one can use… Advisors/Committee Members: Mertz, Jerome C. (advisor).

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Xiao, S. (2019). Strategies for contrast improvement in optical microscopy. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/38516

Chicago Manual of Style (16^th Edition):

Xiao, Sheng. “Strategies for contrast improvement in optical microscopy.” 2019. Doctoral Dissertation, Boston University. Accessed March 01, 2021. http://hdl.handle.net/2144/38516.

MLA Handbook (7^th Edition):

Xiao, Sheng. “Strategies for contrast improvement in optical microscopy.” 2019. Web. 01 Mar 2021.

Vancouver:

Xiao S. Strategies for contrast improvement in optical microscopy. [Internet] [Doctoral dissertation]. Boston University; 2019. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2144/38516.

Council of Science Editors:

Xiao S. Strategies for contrast improvement in optical microscopy. [Doctoral Dissertation]. Boston University; 2019. Available from: http://hdl.handle.net/2144/38516

Universidad de Cantabria

15. Fernández Pérez, Andrea. Estudio de células cancerosas mediante métodos ópticos: polarimetría aplicada al análisis de la muerte celular inducida por quimioterapia: Study of cancer cells with optical methods: polarimetric techniques applied to the analysis of chemotherapy-induced cell death.

Degree: 2019, Universidad de Cantabria

URL: http://hdl.handle.net/10902/17390

► RESUMEN: La polarimetría es una herramienta muy útil en problemas de interacción luz-materia, con muchas aplicaciones exitosas en áreas tales como la biología y la… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fernández Pérez, A. (2019). Estudio de células cancerosas mediante métodos ópticos: polarimetría aplicada al análisis de la muerte celular inducida por quimioterapia: Study of cancer cells with optical methods: polarimetric techniques applied to the analysis of chemotherapy-induced cell death. (Doctoral Dissertation). Universidad de Cantabria. Retrieved from http://hdl.handle.net/10902/17390

Chicago Manual of Style (16^th Edition):

Fernández Pérez, Andrea. “Estudio de células cancerosas mediante métodos ópticos: polarimetría aplicada al análisis de la muerte celular inducida por quimioterapia: Study of cancer cells with optical methods: polarimetric techniques applied to the analysis of chemotherapy-induced cell death.” 2019. Doctoral Dissertation, Universidad de Cantabria. Accessed March 01, 2021. http://hdl.handle.net/10902/17390.

MLA Handbook (7^th Edition):

Fernández Pérez, Andrea. “Estudio de células cancerosas mediante métodos ópticos: polarimetría aplicada al análisis de la muerte celular inducida por quimioterapia: Study of cancer cells with optical methods: polarimetric techniques applied to the analysis of chemotherapy-induced cell death.” 2019. Web. 01 Mar 2021.

Vancouver:

Fernández Pérez A. Estudio de células cancerosas mediante métodos ópticos: polarimetría aplicada al análisis de la muerte celular inducida por quimioterapia: Study of cancer cells with optical methods: polarimetric techniques applied to the analysis of chemotherapy-induced cell death. [Internet] [Doctoral dissertation]. Universidad de Cantabria; 2019. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10902/17390.

Council of Science Editors:

Fernández Pérez A. Estudio de células cancerosas mediante métodos ópticos: polarimetría aplicada al análisis de la muerte celular inducida por quimioterapia: Study of cancer cells with optical methods: polarimetric techniques applied to the analysis of chemotherapy-induced cell death. [Doctoral Dissertation]. Universidad de Cantabria; 2019. Available from: http://hdl.handle.net/10902/17390

Boston University

16. Beaulieu, Devin R. Reverberation multiphoton microscopy for volumetric imaging in scattering media.

Degree: PhD, Electrical & Computer Engineering, 2020, Boston University

URL: http://hdl.handle.net/2144/41019

► Multiphoton microscopy has become an extremely valuable tool for peering deeply into thick, scattering media such as biological tissue. However, the traditional multiphoton beam-scanning approach… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Beaulieu, D. R. (2020). Reverberation multiphoton microscopy for volumetric imaging in scattering media. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/41019

Chicago Manual of Style (16^th Edition):

Beaulieu, Devin R. “Reverberation multiphoton microscopy for volumetric imaging in scattering media.” 2020. Doctoral Dissertation, Boston University. Accessed March 01, 2021. http://hdl.handle.net/2144/41019.

MLA Handbook (7^th Edition):

Beaulieu, Devin R. “Reverberation multiphoton microscopy for volumetric imaging in scattering media.” 2020. Web. 01 Mar 2021.

Vancouver:

Beaulieu DR. Reverberation multiphoton microscopy for volumetric imaging in scattering media. [Internet] [Doctoral dissertation]. Boston University; 2020. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2144/41019.

Council of Science Editors:

Beaulieu DR. Reverberation multiphoton microscopy for volumetric imaging in scattering media. [Doctoral Dissertation]. Boston University; 2020. Available from: http://hdl.handle.net/2144/41019

Boston University

17. Snyder, John William. Infrared to ultraviolet quantum frequency conversion in micron-scale periodically poled titanium-diffused lithium niobate waveguides.

Degree: PhD, Electrical & Computer Engineering, 2020, Boston University

URL: http://hdl.handle.net/2144/41036

► The quantum nature of light at the single photon level allows for unique applications that classical physics neither predicts nor describes. Most notably, appropriate conditions… (more)

▼ The quantum nature of light at the single photon level allows for unique applications that classical physics neither predicts nor describes. Most notably, appropriate conditions may cause the states of photons with indistinguishable properties to become entangled, enabling novel approaches to quantum computation, secure communications, and metrology. Any operational quantum information network transporting entangled-photon states must establish a high-fidelity link between its distant nodes despite the inherent fragility of entangled states. However, the lack of a universal operating wavelength for all optical devices makes this a substantial challenge. Telecommunication fibers, entangled photon pair sources, quantum optical memories, and quantum repeaters all function in disparate spectral windows dictated by the properties of the materials used to fabricate them. Quantum frequency conversion (QFC), the single-photon limit of nonlinear parametric sum and difference frequency generation in optics, offers a bridge between spectral regions with full preservation of quantum state character, including entanglement. Periodically poled optical waveguides in ferroelectric crystals are versatile tools in nonlinear optics. Confining the nonlinear interaction to a waveguide greatly enhances its efficiency compared to bulk optics. Periodic poling, the process of periodically inverting the domains of a ferroelectric medium using a strong electric field, enables a variety of quasi-phase matching configurations to engineer a desired nonlinear interaction. This work concentrates on the design, development, fabrication, and characterization of a titanium-diffused periodically poled lithium niobate (Ti:PPLN) waveguide device. This device is designed to execute single-step quantum frequency conversion from 369.5nm to 1550nm in order to facilitate a quantum state transfer between standard fiber telecommunication wavelengths and an atomic quantum memory system employing trapped ytterbium ions. The creation of phase matching conditions for such an extreme distance in frequency demands precise control of high magnitude electric fields on the single-micron scale. As the first demonstration of its kind in Ti:PPLN, the development of these devices included novel improvements to existing fabrication methods, improving the state-of-the-art of precision, quality, and yield for poling of ferroelectric crystals. Advisors/Committee Members: Sergienko, Alexander V. (advisor).

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Snyder, J. W. (2020). Infrared to ultraviolet quantum frequency conversion in micron-scale periodically poled titanium-diffused lithium niobate waveguides. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/41036

Chicago Manual of Style (16^th Edition):

Snyder, John William. “Infrared to ultraviolet quantum frequency conversion in micron-scale periodically poled titanium-diffused lithium niobate waveguides.” 2020. Doctoral Dissertation, Boston University. Accessed March 01, 2021. http://hdl.handle.net/2144/41036.

MLA Handbook (7^th Edition):

Snyder, John William. “Infrared to ultraviolet quantum frequency conversion in micron-scale periodically poled titanium-diffused lithium niobate waveguides.” 2020. Web. 01 Mar 2021.

Vancouver:

Snyder JW. Infrared to ultraviolet quantum frequency conversion in micron-scale periodically poled titanium-diffused lithium niobate waveguides. [Internet] [Doctoral dissertation]. Boston University; 2020. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2144/41036.

Council of Science Editors:

Snyder JW. Infrared to ultraviolet quantum frequency conversion in micron-scale periodically poled titanium-diffused lithium niobate waveguides. [Doctoral Dissertation]. Boston University; 2020. Available from: http://hdl.handle.net/2144/41036

Arizona State University

18. Blake, Adam Hall. Optical Properties of Hybrid Nanomaterials.

Degree: Physics, 2016, Arizona State University

URL: http://repository.asu.edu/items/40736

► The interaction of light with nanoscale structures consisting of metal and two-level quantum emitters is investigated computationally. A method of tilting the incoming electromagnetic wave… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Blake, A. H. (2016). Optical Properties of Hybrid Nanomaterials. (Doctoral Dissertation). Arizona State University. Retrieved from http://repository.asu.edu/items/40736

Chicago Manual of Style (16^th Edition):

Blake, Adam Hall. “Optical Properties of Hybrid Nanomaterials.” 2016. Doctoral Dissertation, Arizona State University. Accessed March 01, 2021. http://repository.asu.edu/items/40736.

MLA Handbook (7^th Edition):

Blake, Adam Hall. “Optical Properties of Hybrid Nanomaterials.” 2016. Web. 01 Mar 2021.

Vancouver:

Blake AH. Optical Properties of Hybrid Nanomaterials. [Internet] [Doctoral dissertation]. Arizona State University; 2016. [cited 2021 Mar 01]. Available from: http://repository.asu.edu/items/40736.

Council of Science Editors:

Blake AH. Optical Properties of Hybrid Nanomaterials. [Doctoral Dissertation]. Arizona State University; 2016. Available from: http://repository.asu.edu/items/40736

University of Maryland

19. Zhu, Tiecheng. LAYER PEELING/ADDING ALGORITHM AND COMPLEX WAVEGUIDE BRAGG GRATING FOR ANY SPECTRUM GENERATION & FIBER-TO-WAVEGUIDE COUPLER WITH ULTRA HIGH COUPLING EFFICIENCY.

Degree: Electrical Engineering, 2016, University of Maryland

URL: http://hdl.handle.net/1903/19308

► Part I: Layer Peeling/Adding Algorithm and Complex Waveguide Bragg Grating For Any Spectrum Generation A Layer Peeling/Adding algorithm for designing optical lters is not only… (more)

▼ Part I: Layer Peeling/Adding Algorithm and Complex Waveguide Bragg Grating For Any Spectrum Generation A Layer Peeling/Adding algorithm for designing optical lters is not only de- veloped theoretically but also demonstrated experimentally. Unlike the conventional design approaches which can handle only limited spectral proles, the algorithm pre- sented here is capable of generating transmission/re ection spectrum of any shape. As a proof of demonstration, Complex Waveguide Bragg Gratings (CWBG) are designed, fabricated and characterized using the algorithm. The CWBG, which is implemented as a single-mode Si3N4/SiO2 waveguide grating with aperiodic varying waveguide widths, is capable of removing a large number of randomly-distributed wavelengths simultaneously. Two generations of CWBGs are designed and fabri- cated to remove 20 and 47 notches respectively, with spectral precision better than 0:1 nm, suppression ratios larger than 15 dB, and 3-dB widths of 0.3 nm. Among CWBG's various potential applications, we highlight its use for eliminating the mul- tiple OH emission lines from the Earth's atmosphere for ground-based astronomical observations. Part II: Fiber-to-Waveguide Coupler With Ultra High Coupling Efficiency An easy-to-fabricate but very efficient ber-to-waveguide coupler is theoreti- cally analyzed and experimentally demonstrated. In this design, light from a single- mode UHNA3 ber can be butt-coupled into a single-mode high-index-contrast Si3N4/SiO2 waveguide with a measured coupling efficiency of 96 % at the wavelength of 1550 nm, and > 90 % in the spectral range from 1450 nm to 1650 nm. Large horizontal and vertical alignment tolerances of 3.8 m and 3.6 m respectively are obtained between the ber and the waveguide coupler. Coupling efficiencies are also characterized using Si3N4/SiO2 waveguides and both SMF28 ber and SM1500G80 ber. All these experimental results agree well with simulations. The waveguide coupler also features ease of end-facet cleaving, and can be used in ultra-broadband high coupling efficiency applications. Advisors/Committee Members: Dagenais, Mario (advisor), Veilleux, Sylvain (advisor).

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhu, T. (2016). LAYER PEELING/ADDING ALGORITHM AND COMPLEX WAVEGUIDE BRAGG GRATING FOR ANY SPECTRUM GENERATION & FIBER-TO-WAVEGUIDE COUPLER WITH ULTRA HIGH COUPLING EFFICIENCY. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/19308

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhu, Tiecheng. “LAYER PEELING/ADDING ALGORITHM AND COMPLEX WAVEGUIDE BRAGG GRATING FOR ANY SPECTRUM GENERATION & FIBER-TO-WAVEGUIDE COUPLER WITH ULTRA HIGH COUPLING EFFICIENCY.” 2016. Thesis, University of Maryland. Accessed March 01, 2021. http://hdl.handle.net/1903/19308.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhu, Tiecheng. “LAYER PEELING/ADDING ALGORITHM AND COMPLEX WAVEGUIDE BRAGG GRATING FOR ANY SPECTRUM GENERATION & FIBER-TO-WAVEGUIDE COUPLER WITH ULTRA HIGH COUPLING EFFICIENCY.” 2016. Web. 01 Mar 2021.

Vancouver:

Zhu T. LAYER PEELING/ADDING ALGORITHM AND COMPLEX WAVEGUIDE BRAGG GRATING FOR ANY SPECTRUM GENERATION & FIBER-TO-WAVEGUIDE COUPLER WITH ULTRA HIGH COUPLING EFFICIENCY. [Internet] [Thesis]. University of Maryland; 2016. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1903/19308.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhu T. LAYER PEELING/ADDING ALGORITHM AND COMPLEX WAVEGUIDE BRAGG GRATING FOR ANY SPECTRUM GENERATION & FIBER-TO-WAVEGUIDE COUPLER WITH ULTRA HIGH COUPLING EFFICIENCY. [Thesis]. University of Maryland; 2016. Available from: http://hdl.handle.net/1903/19308

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Maryland

20. Zahedpour Anaraki, Sina. ULTRAFAST NONLINEAR RESPONSE OF ATOMIC AND MOLECULAR GASES IN NEAR-IR AND MID-IR REGIONS.

Degree: Electrical Engineering, 2017, University of Maryland

URL: http://hdl.handle.net/1903/20278

► There is a dynamical interaction between an ultrashort laser pulse and the medium it propagates through. At the shortest timescales, the near-instantaneous electronic response of… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zahedpour Anaraki, S. (2017). ULTRAFAST NONLINEAR RESPONSE OF ATOMIC AND MOLECULAR GASES IN NEAR-IR AND MID-IR REGIONS. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/20278

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zahedpour Anaraki, Sina. “ULTRAFAST NONLINEAR RESPONSE OF ATOMIC AND MOLECULAR GASES IN NEAR-IR AND MID-IR REGIONS.” 2017. Thesis, University of Maryland. Accessed March 01, 2021. http://hdl.handle.net/1903/20278.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zahedpour Anaraki, Sina. “ULTRAFAST NONLINEAR RESPONSE OF ATOMIC AND MOLECULAR GASES IN NEAR-IR AND MID-IR REGIONS.” 2017. Web. 01 Mar 2021.

Vancouver:

Zahedpour Anaraki S. ULTRAFAST NONLINEAR RESPONSE OF ATOMIC AND MOLECULAR GASES IN NEAR-IR AND MID-IR REGIONS. [Internet] [Thesis]. University of Maryland; 2017. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1903/20278.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zahedpour Anaraki S. ULTRAFAST NONLINEAR RESPONSE OF ATOMIC AND MOLECULAR GASES IN NEAR-IR AND MID-IR REGIONS. [Thesis]. University of Maryland; 2017. Available from: http://hdl.handle.net/1903/20278

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Central Florida

21. Zhao, Peng. Ultrafast Mechanisms of Nonlinear Refraction and Two-photon Photochromism.

Degree: 2016, University of Central Florida

URL: https://stars.library.ucf.edu/etd/5276

► Derived from a material's third-order nonlinearity, nonlinear refraction (NLR) occurs at any wavelength in any material, and may exhibit noninstantaneous dynamics depending on its physical… (more)

▼ Derived from a material's third-order nonlinearity, nonlinear refraction (NLR) occurs at any wavelength in any material, and may exhibit noninstantaneous dynamics depending on its physical origins. The main subject of this dissertation is to investigate the underlying mechanisms responsible for the NLR response in different phases of matter, e.g. liquids, gases, and semiconductors, by extensively using our recently developed ultrafast Beam Deflection (BD) technique. An additional subject includes the characterization of a novel two-photon photochromic molecule. In molecular liquids, the major nonlinear optical (NLO) response can be decomposed into a nearly instantaneous bound-electronic NLR (Kerr effect), originating from the real part the electronic second hyperpolarizability, ?, and noninstantaneous mechanisms due to nuclear motions. By adopting the methodology previously developed for carbon disulfide (CS2), we have measured the NLO response functions of 23 common organic solvents, providing a database of magnitudes and temporal dynamics of each mechanism, which can be used for predicting the outcomes of any other NLR related experiments such as Z-scan. Also, these results provide insight to relate solvent nonlinearities with their molecular structures as well as linear polarizability tensors. In the measurements of air and gaseous CS2, coherent Raman excitation of many rotational states manifests as revivals in the transient NLR, from which we identify N2, O2 and two isotopologues of CS2, and unambiguously determine the dephasing rate, and rotational and centrifugal constants of each constituent. Using the revival signal as a self-reference, ? is directly measured for CS2 molecules in gas phase, which coincides with the ? determined from liquid phase measurements when including the Lorentz-Lorenz local field correction. In semiconductors, the Kerr effect dominates the NLR in the sub-gap regime. Here, we primarily focus on investigating the dispersion of nondegenerate (ND) NLR, namely the refractive index change at frequency ?_a due to the presence of a beam at frequency ?_b. The magnitude and sign of the ND-NLR coefficient n_2 (?_a;?_b ) are determined for ZnO, ZnSe and CdS over a broad spectral range for different values of nondegeneracy, which closely follows our earlier predictions based on nonlinear Kramers-Kronig relations. In the extremely nondegenerate case, n_2 (?_a;?_b ) is positively enhanced near the two-photon absorption (2PA) edge, suggesting applications for nondegenerate all-optical switching. Additionally, n_2 (?_a;?_b ) exhibits a strong anomalous nonlinear dispersion within the ND-2PA spectral region, providing a large phase modulation of a femtosecond pulse with bandwidth centered near the zero-crossing frequency. Another subject of this dissertation is the characterization of a spiro-type two-photon photochromic molecule, in which Förster resonance energy transfer (FRET) is utilized to activate the ring-opening effect from a 2PA-donor chromophore. Evidence of energy transfer is observed… Advisors/Committee Members: Hagan, David J..

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhao, P. (2016). Ultrafast Mechanisms of Nonlinear Refraction and Two-photon Photochromism. (Doctoral Dissertation). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/5276

Chicago Manual of Style (16^th Edition):

Zhao, Peng. “Ultrafast Mechanisms of Nonlinear Refraction and Two-photon Photochromism.” 2016. Doctoral Dissertation, University of Central Florida. Accessed March 01, 2021. https://stars.library.ucf.edu/etd/5276.

MLA Handbook (7^th Edition):

Zhao, Peng. “Ultrafast Mechanisms of Nonlinear Refraction and Two-photon Photochromism.” 2016. Web. 01 Mar 2021.

Vancouver:

Zhao P. Ultrafast Mechanisms of Nonlinear Refraction and Two-photon Photochromism. [Internet] [Doctoral dissertation]. University of Central Florida; 2016. [cited 2021 Mar 01]. Available from: https://stars.library.ucf.edu/etd/5276.

Council of Science Editors:

Zhao P. Ultrafast Mechanisms of Nonlinear Refraction and Two-photon Photochromism. [Doctoral Dissertation]. University of Central Florida; 2016. Available from: https://stars.library.ucf.edu/etd/5276

University of Central Florida

22. Digaum, Jennefir. Fabrication and Characterization of Spatially-Variant Self-Collimating Photonic Crystals.

Degree: 2016, University of Central Florida

URL: https://stars.library.ucf.edu/etd/5301

► Spatially-variant photonic crystals (SVPCs) created using materials having a low refractive index are shown to be capable of abruptly controlling light beams with high polarization… (more)

▼ Spatially-variant photonic crystals (SVPCs) created using materials having a low refractive index are shown to be capable of abruptly controlling light beams with high polarization selectivity. SVPCs are photonic crystals for which the orientation of the unit cell is controllably varied throughout the lattice to control the flow of light. Multi-photon lithography in a photo polymer was used to fabricate three-dimensional SVPCs that direct the flow of light around a 90 degree bend. The optical performance of the SVPCs was characterized using a scanning optical-fiber system that introduced light onto the input face of a structure and measured the intensity of light emanating from the output faces. As a proof-of-concept, SVPCs that can bend a beam at a wavelength of ?0 = 2.94 ?m were fabricated in the photo-polymer SU-8. The SVPCs were shown to direct infrared light of one polarization through a sharp bend, while the other polarization propagated straight through the SVPC, when the volumetric fill-factor is near 50%. The peak-to-peak ratio of intensities of the bent- and straight-through beams was 8:1, and a power efficiency of 8% was achieved. The low efficiency is attributed to optical absorption in SU-8 at ?0 = 2.94 ?m. SVPCs that can bend a beam at telecommunications wavelengths near ?0 = 1.55 ?m were fabricated by multi-photon lithography in the photo-polymer IP-Dip. IP-Dip was chosen over SU 8 to enable fabrication of finer features, as are needed for an SVPC scaled in size to operate at shorter wavelengths. Experimental characterization shows that these particular SVPCs provide effective control of the vertically polarized beam at ?0 = 1.55 ?m, when the volumetric fill-factor is around 46%. The beam bending peak efficiency was found to be 52.5% with a peak-to-peak ratio between the bent- and straight-through beams of 78.7. Additionally, these SVPCs can bend a light beam with a broad bandwidth of 153 nm that encompasses both the C- and S-bands of the telecommunications window. Furthermore, the SVPCs have high tolerance to misalignment, in which an offset of the input beam by as much as 6 ?m causes the beam-bending efficiency to drop no more than 50%. Finally, it is shown that these particular SVPCs can bend beams without significantly distorting the mode profile. This work introduces a new scheme for controlling light that should be useful for integrated photonics. The penultimate chapter discusses nonlinear phenomena that were observed during the optical characterization of the SVPCs using a high peak-power amplified femtosecond laser system. The first of these effects is referred to as "super-collimation", in which the beam bending peak efficiency of certain SVPCs increases with input intensity, reaching as high as 68%. The second effect pertains to nonlinear imaging of light at ?0 = 1.55 ?m scattered from an SVPC and detected using a silicon-CCD camera. This effect enables beam bending within the device to be imaged in real time. The dissertation concludes with an outlook for SVPCs, discussing… Advisors/Committee Members: Kuebler, Stephen.

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Digaum, J. (2016). Fabrication and Characterization of Spatially-Variant Self-Collimating Photonic Crystals. (Doctoral Dissertation). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/5301

Chicago Manual of Style (16^th Edition):

Digaum, Jennefir. “Fabrication and Characterization of Spatially-Variant Self-Collimating Photonic Crystals.” 2016. Doctoral Dissertation, University of Central Florida. Accessed March 01, 2021. https://stars.library.ucf.edu/etd/5301.

MLA Handbook (7^th Edition):

Digaum, Jennefir. “Fabrication and Characterization of Spatially-Variant Self-Collimating Photonic Crystals.” 2016. Web. 01 Mar 2021.

Vancouver:

Digaum J. Fabrication and Characterization of Spatially-Variant Self-Collimating Photonic Crystals. [Internet] [Doctoral dissertation]. University of Central Florida; 2016. [cited 2021 Mar 01]. Available from: https://stars.library.ucf.edu/etd/5301.

Council of Science Editors:

Digaum J. Fabrication and Characterization of Spatially-Variant Self-Collimating Photonic Crystals. [Doctoral Dissertation]. University of Central Florida; 2016. Available from: https://stars.library.ucf.edu/etd/5301

University of Central Florida

23. Aleahmad, Parinaz. Monolithically Integrated InP-based Unidirectional Circulators Utilizing non-Hermiticity and Nonlinearity.

Degree: 2016, University of Central Florida

URL: https://stars.library.ucf.edu/etd/5285

► The need to integrate critical optical components on a single chip has been an ongoing quest in both optoelectronics and optical communication systems. Among the… (more)

▼ The need to integrate critical optical components on a single chip has been an ongoing quest in both optoelectronics and optical communication systems. Among the possible devices, elements supporting non-reciprocal transmission are of great interest for applications where signal routing and isolation is required. In this respect, breaking reciprocity is typically accomplished via Faraday rotation through appropriate magneto-optical arrangements. Unfortunately, standard light emitting optoelectronic materials like for example III-V semiconductors, lack magneto-optical properties and hence cannot be directly used in this capacity. To address these issues, a number of different tactics have been attempted in the last few years. These range from directly bonding garnets on chip, to parametric structures and unidirectional nonlinear arrangements involving ring resonators, to mention a few. Clearly, of importance will be to realize families of non-reciprocal devises that not only can be miniaturized and readily integrated on chip but they also rely on physical processes that are indigenous to the semiconductor wafer itself. Quite recently we have theoretically shown that such unidirectional systems can be implemented, provided one simultaneously exploits the presence of gain/loss processes and optical nonlinearities. In principle, these all-dielectric structures can be broadband, polarization insensitive, color-preserving, and can display appreciable isolation ratios provided they are used under pulsed conditions. In this study, we experimentally demonstrate a compact, monolithically integrated unidirectional 4×4 optical circulator, based on non-reciprocal optical transmission through successive amplification/attenuation stages and elements with very large resonance nonlinearities associated with InGaAsP quantum wells. Our results indicate that isolation ratios over 20dB can be experimentally achieved in pulse-mode operation. Our design can be effortlessly extended to other existing optoelectronic device systems beyond InP. Advisors/Committee Members: Christodoulides, Demetrios.

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Aleahmad, P. (2016). Monolithically Integrated InP-based Unidirectional Circulators Utilizing non-Hermiticity and Nonlinearity. (Doctoral Dissertation). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/5285

Chicago Manual of Style (16^th Edition):

Aleahmad, Parinaz. “Monolithically Integrated InP-based Unidirectional Circulators Utilizing non-Hermiticity and Nonlinearity.” 2016. Doctoral Dissertation, University of Central Florida. Accessed March 01, 2021. https://stars.library.ucf.edu/etd/5285.

MLA Handbook (7^th Edition):

Aleahmad, Parinaz. “Monolithically Integrated InP-based Unidirectional Circulators Utilizing non-Hermiticity and Nonlinearity.” 2016. Web. 01 Mar 2021.

Vancouver:

Aleahmad P. Monolithically Integrated InP-based Unidirectional Circulators Utilizing non-Hermiticity and Nonlinearity. [Internet] [Doctoral dissertation]. University of Central Florida; 2016. [cited 2021 Mar 01]. Available from: https://stars.library.ucf.edu/etd/5285.

Council of Science Editors:

Aleahmad P. Monolithically Integrated InP-based Unidirectional Circulators Utilizing non-Hermiticity and Nonlinearity. [Doctoral Dissertation]. University of Central Florida; 2016. Available from: https://stars.library.ucf.edu/etd/5285

University of Central Florida

24. Chiles, Jeffrey. Hybrid Integrated Photonic Platforms and Devices.

Degree: 2016, University of Central Florida

URL: https://stars.library.ucf.edu/etd/5275

► Integrated photonics has the potential to revolutionize optical systems by achieving drastic reductions in their size, weight and power. Remote spectroscopy, free-space communications and high-speed… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chiles, J. (2016). Hybrid Integrated Photonic Platforms and Devices. (Doctoral Dissertation). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/5275

Chicago Manual of Style (16^th Edition):

Chiles, Jeffrey. “Hybrid Integrated Photonic Platforms and Devices.” 2016. Doctoral Dissertation, University of Central Florida. Accessed March 01, 2021. https://stars.library.ucf.edu/etd/5275.

MLA Handbook (7^th Edition):

Chiles, Jeffrey. “Hybrid Integrated Photonic Platforms and Devices.” 2016. Web. 01 Mar 2021.

Vancouver:

Chiles J. Hybrid Integrated Photonic Platforms and Devices. [Internet] [Doctoral dissertation]. University of Central Florida; 2016. [cited 2021 Mar 01]. Available from: https://stars.library.ucf.edu/etd/5275.

Council of Science Editors:

Chiles J. Hybrid Integrated Photonic Platforms and Devices. [Doctoral Dissertation]. University of Central Florida; 2016. Available from: https://stars.library.ucf.edu/etd/5275

The Ohio State University

25. Yaquinto, Brennen Ritter, Yaquinto. Rapid Pointing Performance Comparison between Spectacle and Contact Lens Wear.

Degree: MS, Vision Science, 2018, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1522243382611988

► It is believed that contact lenses are better for sports than spectacles. However, there are few quantitative studies to back up this claim. There are… (more)

▼ It is believed that contact lenses are better for sports than spectacles. However, there are few quantitative studies to back up this claim. There are multiple hypothesized causes for decreased performance in spectacles, such as prismatic deviation, chromatic aberrations, and restricted field of view with a frame. The purpose of this study was to investigate if there is a difference in performance between contact lenses and spectacles while performing a rapid pointing task.Subjects were tested by using an AcuVision 1000, which required them to point and touch targets presented to them rapidly. Subjects performed this task in both contact lenses and spectacles while wearing a tracker that monitored their head movement. They were given a trial run before scoring to allow for learning of the device and task. The targets were presented at an interval of 0.80 seconds, with the next target appearing either when time had expired, or when the current target was hit. The printout from each trial showed the number and location of correct, late, and missed targets.The number of correct, late, and missed targets were compared between contacts and spectacles, as was the time to complete the task. The mean time of completion was faster with contact lenses by 1.5 seconds. The total number of correct responses overall was significantly higher in contact lenses (+5.32 ± 7.60), the total number of missed responses was significantly lower (-5.16 ± 7.46), and the number of late responses were virtually the same (+0.16 ± 8.08). When looking at the central targets of the AcuVision 1000, there were more correct responses (+1.581 ± 5.188) and less late responses (-0.87 ± 5.80) in contact lenses with a similar number of missed responses when compared to spectacles (-1.032 ± 2.938). When looking at the peripheral targets, the number of correct targets was higher (+3.42 ± 5.45) while the number of missed targets was lower (-4.10 ± 6.12) in contact lenses, with a similar number of late responses (+0.677 ± 5.128). We did not find a significant difference between spectacles and contact lenses when comparing refractive errors, which leads us to believe that chromatic aberrations and prismatic effect did not play a role in the diminished performance in spectacles found in this study. The difference in performance between contact lenses and spectacles is likely due to the constraints of the frame, especially while turning the head towards targets. Advisors/Committee Members: Fogt, Nicklaus (Advisor).

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yaquinto, Brennen Ritter, Y. (2018). Rapid Pointing Performance Comparison between Spectacle and Contact Lens Wear. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1522243382611988

Chicago Manual of Style (16^th Edition):

Yaquinto, Brennen Ritter, Yaquinto. “Rapid Pointing Performance Comparison between Spectacle and Contact Lens Wear.” 2018. Masters Thesis, The Ohio State University. Accessed March 01, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1522243382611988.

MLA Handbook (7^th Edition):

Yaquinto, Brennen Ritter, Yaquinto. “Rapid Pointing Performance Comparison between Spectacle and Contact Lens Wear.” 2018. Web. 01 Mar 2021.

Vancouver:

Yaquinto, Brennen Ritter Y. Rapid Pointing Performance Comparison between Spectacle and Contact Lens Wear. [Internet] [Masters thesis]. The Ohio State University; 2018. [cited 2021 Mar 01]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1522243382611988.

Council of Science Editors:

Yaquinto, Brennen Ritter Y. Rapid Pointing Performance Comparison between Spectacle and Contact Lens Wear. [Masters Thesis]. The Ohio State University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1522243382611988

University of Dayton

26. Zhou, Sichao. Structured Light from Pupil Plane to Focal Field.

Degree: PhD, Electro-Optics, 2020, University of Dayton

URL: http://rave.ohiolink.edu/etdc/view?acc_num=dayton1596569999236042

► It is well known that an optical field consists of phase, amplitude, and the state of polarization (SOP). Spatially customized optical field within the cross… (more)

▼ It is well known that an optical field consists of phase, amplitude, and the state of polarization (SOP). Spatially customized optical field within the cross section have drawn significant attention recently and expected to lead to new effects and phenomena that can expand the functionality and enhance the capability of optical systems. Under high numerical-aperture (NA) focusing these customized structured lights are expected to exhibit novel phenomena when interact with various type of structured-materials. These interactions may find important applications in super-resolution microscopy, particle trapping and manipulation, materials characterization, as well as three-dimensional high-density optical storage.This dissertation is organized in two parts. In the first part, many different methods to generate complex optical fields using diffractive elements will be reviewed. Among these methods, we will focus on the Vectorial Optical Field Generator (VOF-Gen), which is capable of creating an arbitrary beam with independent controls of phase, amplitude and polarization on the pixel level utilizing high resolution reflective phase-only liquid crystal (LC) spatial light modulator (SLM). Experimental results will be presented, where various optical fields containing phase, amplitude, polarization and retardation modulations are successfully demonstrated.In the second part, focus shaping, three-dimensional (3D) state of polarization and magnetization control, and focusing with spatially variant polarization are investigated and demonstrated. An approach to create diffraction-limited optical focal spots with arbitrarily oriented magnetic dipolar field components in 4Pi microscopy configuration is proposed. This is achieved by focusing two counter-propagating modulated vector beams consisting of complex intensity and polarization distribution. Through combining the magnetic dipole radiation pattern and the Richards–Wolf vectorial diffraction method, the required illuminations at the pupil plane of a 4Pi focusing configuration for the reconstruction of magnetic dipole focal field are found analytically. Furthermore, the orientation of the doughnut shape focal field can be rotated arbitrarily by modulating the pupil field distribution carefully. As an extension, a three-dimensional optical bubble encloses a transversely spinning magnetic field can be obtained by introducing a second magnetic dipole oriented in the orthogonal plane with appropriate amplitude and phase differences. Advisors/Committee Members: Zhan, Qiwen (Committee Chair).

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhou, S. (2020). Structured Light from Pupil Plane to Focal Field. (Doctoral Dissertation). University of Dayton. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=dayton1596569999236042

Chicago Manual of Style (16^th Edition):

Zhou, Sichao. “Structured Light from Pupil Plane to Focal Field.” 2020. Doctoral Dissertation, University of Dayton. Accessed March 01, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1596569999236042.

MLA Handbook (7^th Edition):

Zhou, Sichao. “Structured Light from Pupil Plane to Focal Field.” 2020. Web. 01 Mar 2021.

Vancouver:

Zhou S. Structured Light from Pupil Plane to Focal Field. [Internet] [Doctoral dissertation]. University of Dayton; 2020. [cited 2021 Mar 01]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=dayton1596569999236042.

Council of Science Editors:

Zhou S. Structured Light from Pupil Plane to Focal Field. [Doctoral Dissertation]. University of Dayton; 2020. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=dayton1596569999236042

University of Dayton

27. Li, Yunyang. Dynamics of Laser-Induced 3D Microbubbles in an Absorbing Liquid.

Degree: MS(M.S.), Electro-Optics, 2019, University of Dayton

URL: http://rave.ohiolink.edu/etdc/view?acc_num=dayton156516377076545

► Optical trapping and manipulation of such microbubbles in a liquid can be used in precise drug delivery and other biological applications. In this work, the… (more)

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Li, Y. (2019). Dynamics of Laser-Induced 3D Microbubbles in an Absorbing Liquid. (Masters Thesis). University of Dayton. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=dayton156516377076545

Chicago Manual of Style (16^th Edition):

Li, Yunyang. “Dynamics of Laser-Induced 3D Microbubbles in an Absorbing Liquid.” 2019. Masters Thesis, University of Dayton. Accessed March 01, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton156516377076545.

MLA Handbook (7^th Edition):

Li, Yunyang. “Dynamics of Laser-Induced 3D Microbubbles in an Absorbing Liquid.” 2019. Web. 01 Mar 2021.

Vancouver:

Li Y. Dynamics of Laser-Induced 3D Microbubbles in an Absorbing Liquid. [Internet] [Masters thesis]. University of Dayton; 2019. [cited 2021 Mar 01]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=dayton156516377076545.

Council of Science Editors:

Li Y. Dynamics of Laser-Induced 3D Microbubbles in an Absorbing Liquid. [Masters Thesis]. University of Dayton; 2019. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=dayton156516377076545

The Ohio State University

28. Willig, Alyssa Mary. Ciliary Muscle Thickness Changes Are Associated With Age.

Degree: MS, Vision Science, 2015, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1449238560

► Purpose: To model the cross-sectional relationship of ciliary muscle thickness (CMT) and age throughout the decades of life.Methods: Subjects (N = 784) were ages 3… (more)

▼ Purpose: To model the cross-sectional relationship of ciliary muscle thickness (CMT) and age throughout the decades of life.Methods: Subjects (N = 784) were ages 3 to 91 years. Measurements included distance autorefraction and Zeiss OCT imaging of the ciliary muscle in the right eye. Four ciliary muscle thickness (CMT) measurements were made at the thickest region (CMTMAX) and at 1, 2, and 3 mm from the scleral spur (CMT1, CMT2, CMT3). General linear regression models were used.Results: Mean ± standard deviation (SD) subject age (years) was 23.4 ± 18.4 (range: 3.4 to 91). Mean ± SD spherical equivalent (D) was -0.53 ± 1.88 (range: -10.87 to +6.00). The relationship between all CMT measures and age was significant [CMTMAX: Intercept = 805.75, Age (ß = 1.04, p < 0.000001)]; CMT1: Intercept = 746.6, Age (ß = 2.3, p = 0.0003), Spherical Equivalent, M (ß = -5.8, p = 0.005), Age2 (ß = -0.02, p = 0.01), M2 (ß = -0.9, p = 0.02); CMT2: Intercept = 483.5, Age (ß = 2.4, p = 0.0007), M (ß = -17.7, p < 0.000001), Age2 (ß = -0.03, p = 0.001), M2 (ß = -1.9, p = 0.00005); CMT3: Intercept = 254.6, Age (ß = 2.8, p < 0.000001), M (ß = -13.4, p < 0.000001), Age2 (ß = -0.04, p = 0.00002), M2 (ß = -1.2, p = 0.001). The relationship between the location of the point of maximum thickness relative to the scleral spur (SStoMAX) and age was also significant (Intercept = 666.55, Age (ß = 4.5, p = 0.08), M (ß = -33.75, p < 0.000001), Age2 (ß = -0.07, p = 0.007), M2 (ß = -2.2, p = 0.06). Discussion: These data show that the relationship between cross-sectional ciliary muscle thickness and age is positive in childhood (increasing ciliary muscle thickness with increasing age) but negative in older age (decreasing ciliary muscle thickness with older age). The point of maximum thickness increased across all decades of life and also moves posteriorly in childhood and then anteriorly in older adults. A similar relationship showing an increase in thickness in younger ages also has been found in previous studies. To the best of our knowledge, our study is the first to describe the cross-sectional relationship between ciliary muscle thickness and age as a quadratic function. Advisors/Committee Members: Bailey, Melissa (Advisor).

Subjects/Keywords: Optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Willig, A. M. (2015). Ciliary Muscle Thickness Changes Are Associated With Age. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1449238560

Chicago Manual of Style (16^th Edition):

Willig, Alyssa Mary. “Ciliary Muscle Thickness Changes Are Associated With Age.” 2015. Masters Thesis, The Ohio State University. Accessed March 01, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449238560.

MLA Handbook (7^th Edition):

Willig, Alyssa Mary. “Ciliary Muscle Thickness Changes Are Associated With Age.” 2015. Web. 01 Mar 2021.

Vancouver:

Willig AM. Ciliary Muscle Thickness Changes Are Associated With Age. [Internet] [Masters thesis]. The Ohio State University; 2015. [cited 2021 Mar 01]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1449238560.

Council of Science Editors:

Willig AM. Ciliary Muscle Thickness Changes Are Associated With Age. [Masters Thesis]. The Ohio State University; 2015. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1449238560

Boston University

29. Demas, Jeffrey. Intermodal parametric frequency conversion in optical fibers.

Degree: PhD, Electrical & Computer Engineering, 2017, Boston University

URL: http://hdl.handle.net/2144/27044

► Lasers are an essential technology enabling countless fields of optics, however, their operation wavelengths are limited to isolated regions across the optical spectrum due to… (more)

▼ Lasers are an essential technology enabling countless fields of optics, however, their operation wavelengths are limited to isolated regions across the optical spectrum due to the need for suitable gain media. Parametric frequency conversion (PFC) is an attractive means to convert existing lasers to new colors using nonlinear optical interactions rather than the material properties of the host medium, allowing for the development of high power laser sources across the entire optical spectrum. PFC in bulk χ(2) crystals has led to the development of the optical parametric oscillator, which is currently the standard source for high power light at non-traditional wavelengths in the laboratory setting. Ideally, however, one could implement PFC in an optical fiber, thus leveraging the crucial benefits of a guided-wave geometry: alignment-free, compact, and robust operation. Four-wave mixing (FWM) is a nonlinear effect in optical fibers that can be used to convert frequencies, the major challenge being conservation of momentum, or phase matching, between the interacting light waves. Phase matching can be satisfied through the interaction of different spatial modes in a multi-mode fiber, however, previous demonstrations have been limited by mode stability and narrow-band FWM gain. Alternatively, phase matching within the fundamental mode can be realized in high-confinement waveguides (such as photonic crystal fibers), but achieving the anomalous waveguide dispersion necessary for phase matching at pump wavelengths near ∼1 μm (where the highest power fiber lasers emit) comes at the cost of reducing the effective area of the mode, thus limiting power-handling. Here, we specifically consider the class of Bessel-like LP0,m modes in step-index fibers. It has been shown that these modes can be selectively excited and guided stably for long lengths of fiber, and mode stability increases with mode order ‘m’. The effective area of modes in these fibers can be very large (>6000 μm2 demonstrated) and is decoupled from dispersion, allowing for phase matching within a single mode in a power-scalable platform. Furthermore, step-index fibers can guide many different LP0,m modes, allowing access to a highly multi-moded basis set with which to study FWM interactions between different modes. In this thesis we develop techniques to excite, propagate, and characterize LP0,m modes in order to demonstrate FWM in two regimes: monomode interactions comprising waves all belonging to the same mode, and intermodal interactions between different modes. In the monomode regime we demonstrate parametric sources which operate at near-infrared wavelengths under-served by conventional fiber lasers, including 880, 974, 1173, and 1347 nm. The output pulses for these systems are ∼300 ps in duration and reach peak powers of ∼10 kW, representing, to the best our knowledge, the highest peak power fiber laser sources demonstrated at these wavelengths to date. In the intermodal regime, we demonstrate a cascade of FWM processes between different modes…

Subjects/Keywords: Optics; Fiber optics; Lasers; Nonlinear optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Demas, J. (2017). Intermodal parametric frequency conversion in optical fibers. (Doctoral Dissertation). Boston University. Retrieved from http://hdl.handle.net/2144/27044

Chicago Manual of Style (16^th Edition):

Demas, Jeffrey. “Intermodal parametric frequency conversion in optical fibers.” 2017. Doctoral Dissertation, Boston University. Accessed March 01, 2021. http://hdl.handle.net/2144/27044.

MLA Handbook (7^th Edition):

Demas, Jeffrey. “Intermodal parametric frequency conversion in optical fibers.” 2017. Web. 01 Mar 2021.

Vancouver:

Demas J. Intermodal parametric frequency conversion in optical fibers. [Internet] [Doctoral dissertation]. Boston University; 2017. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2144/27044.

Council of Science Editors:

Demas J. Intermodal parametric frequency conversion in optical fibers. [Doctoral Dissertation]. Boston University; 2017. Available from: http://hdl.handle.net/2144/27044

University of Ottawa

30. Alam, Mohammad Zahirul. Experiments in Nonlinear Optics with Epsilon-Near-Zero Materials.

Degree: PhD, Sciences / Science, 2020, University of Ottawa

URL: http://dx.doi.org/10.20381/ruor-25312

► Nonlinear optics is the study of interactions of materials with intense light beams made possible by the invention of laser. Arguably the most trivial but… (more)

Subjects/Keywords: Optics; Photonics; Nonlinear optics; Metamaterials; Ultrafast optics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Alam, M. Z. (2020). Experiments in Nonlinear Optics with Epsilon-Near-Zero Materials. (Doctoral Dissertation). University of Ottawa. Retrieved from http://dx.doi.org/10.20381/ruor-25312

Chicago Manual of Style (16^th Edition):

Alam, Mohammad Zahirul. “Experiments in Nonlinear Optics with Epsilon-Near-Zero Materials.” 2020. Doctoral Dissertation, University of Ottawa. Accessed March 01, 2021. http://dx.doi.org/10.20381/ruor-25312.

MLA Handbook (7^th Edition):

Alam, Mohammad Zahirul. “Experiments in Nonlinear Optics with Epsilon-Near-Zero Materials.” 2020. Web. 01 Mar 2021.

Vancouver:

Alam MZ. Experiments in Nonlinear Optics with Epsilon-Near-Zero Materials. [Internet] [Doctoral dissertation]. University of Ottawa; 2020. [cited 2021 Mar 01]. Available from: http://dx.doi.org/10.20381/ruor-25312.

Council of Science Editors:

Alam MZ. Experiments in Nonlinear Optics with Epsilon-Near-Zero Materials. [Doctoral Dissertation]. University of Ottawa; 2020. Available from: http://dx.doi.org/10.20381/ruor-25312

		in
And / Or
		in
And / Or
		in
And / Or
		in

Open Access Theses and Dissertations