subject:( Single mode)

1. Al Halabi, Fadi. Optical OFDM with multiple information-carrying dimensions for elastic access networks.

Degree: PhD, 2019, Bangor University

URL: https://research.bangor.ac.uk/portal/en/theses/optical-ofdm-with-multiple-informationcarrying-dimensions-for-elastic-access-networks(d6be78ca-c755-48c9-8e09-86b462f83b46).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774160

► With the exponential data traffic growth associated with unprecedented emerging bandwidth-hungry network applications and services, the fifth generation (5G) of mobile networks is currently being… (more)

▼ With the exponential data traffic growth associated with unprecedented emerging bandwidth-hungry network applications and services, the fifth generation (5G) of mobile networks is currently being adopted worldwide, which is targeted to provide significant increased signal transmission capacities, massive machine-type communications (MTC), and ultra-reliable low-latency (URLL) real-time services. The 5G network architecture that aims to support these targets adopts the cloud radio access network (C-RAN) where mobile fronthaul connects remote units (RUs) and virtual baseband units (vBBUs), whilst mobile backhaul connects a pool of vBBUs and data centre. To further increase the signal transmission bandwidth of mobile fronthaul/backhaul links in a cost-effective manner, passive optical networks (PONs) are considered as one of the most important candidates. Moreover, intensity-modulation and direct-detection (IMDD) is preferred in these networks to improve its cost-effectiveness and lower the transceiver architecture complexity. From the signal transmission technique point-of-view, the initial stage of 5G should have sufficient transparency to 4G. Since orthogonal frequency division multiplexing (OFDM) is widely used in 4G, thus OFDM is still a promising signal modulation technique for 5G. As such, this dissertation research aims to explore the feasibility of utilising digital signal processing (DSP)-enabled multiple information-carrying dimensions to improve the performance of optical OFDM (OOFDM) IMDD PON systems in terms of signal transmission capacity, system power budget, transceiver design flexibility and system performance adaptability. A subcarrier index-power (SIP) information-bearing dimension is introduced into conventional OOFDM by setting the subcarrier power level at either low or high according to an incoming data sequence in order to convey an extra information bit per subcarrier. As a result, a novel signal transmission technique termed subcarrier index-power modulated optical OFDM (SIPM-OOFDM) is proposed for the first time. Compared with conventional OOFDM adopting similar signal modulation formats, this technique offers an increase of 17% in signal bit rate without compromising the minimum required optical signal-to-noise ratio (OSNR) for achieving a specific bit error rate (BER). Moreover, such improvement does not degrade the performance tolerance to both chromatic dispersion and fiber nonlinearity. As the usage efficiency of high power level subcarriers is not fully maximised in SIPM-OOFDM, a technique termed SIPM-OOFDM with superposition multiplexing (SIPM-OOFDM-SPM) is proposed by applying the superposition multiplexing (SPM) operation for high power subcarriers. SPM passively adds different signal modulation format-encoded complex numbers and assigns the sum to a high power subcarrier. As a direct result, compared to SIPM-OOFDM, SIPM-OOFDM-SPM increases the signal bit rate by 28.6% without increasing the signal modulation formats. To further enhance the power usage efficiency of both high and low…

Subjects/Keywords: OFDM; Single Mode Fiber; Passive Optical Networks

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APA (6^th Edition):

Al Halabi, F. (2019). Optical OFDM with multiple information-carrying dimensions for elastic access networks. (Doctoral Dissertation). Bangor University. Retrieved from https://research.bangor.ac.uk/portal/en/theses/optical-ofdm-with-multiple-informationcarrying-dimensions-for-elastic-access-networks(d6be78ca-c755-48c9-8e09-86b462f83b46).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774160

Chicago Manual of Style (16^th Edition):

Al Halabi, Fadi. “Optical OFDM with multiple information-carrying dimensions for elastic access networks.” 2019. Doctoral Dissertation, Bangor University. Accessed April 14, 2021. https://research.bangor.ac.uk/portal/en/theses/optical-ofdm-with-multiple-informationcarrying-dimensions-for-elastic-access-networks(d6be78ca-c755-48c9-8e09-86b462f83b46).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774160.

MLA Handbook (7^th Edition):

Al Halabi, Fadi. “Optical OFDM with multiple information-carrying dimensions for elastic access networks.” 2019. Web. 14 Apr 2021.

Vancouver:

Al Halabi F. Optical OFDM with multiple information-carrying dimensions for elastic access networks. [Internet] [Doctoral dissertation]. Bangor University; 2019. [cited 2021 Apr 14]. Available from: https://research.bangor.ac.uk/portal/en/theses/optical-ofdm-with-multiple-informationcarrying-dimensions-for-elastic-access-networks(d6be78ca-c755-48c9-8e09-86b462f83b46).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774160.

Council of Science Editors:

Al Halabi F. Optical OFDM with multiple information-carrying dimensions for elastic access networks. [Doctoral Dissertation]. Bangor University; 2019. Available from: https://research.bangor.ac.uk/portal/en/theses/optical-ofdm-with-multiple-informationcarrying-dimensions-for-elastic-access-networks(d6be78ca-c755-48c9-8e09-86b462f83b46).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774160

NSYSU

2. Li, Yi-ling. Mode Field Analysis of Single-mode Multi-core Optical Fibers based on Scalar Coupled Mode Theory.

Degree: Master, Electro-Optical Engineering, 2016, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805116-145037

► The recent trend in optical fiber communication is moving toward developing the multi-core fiber (MCF) with each fiber core supporting either a single mode or… (more)

▼ The recent trend in optical fiber communication is moving toward developing the multi-core fiber (MCF) with each fiber core supporting either a single mode or multi modes. It will effectively increase the bandwidth of the communications system. However, for the single-mode MCF as we reduce the cladding spacing between each core the coupling among each core increases. This will result in undesirable signal crosstalk coming from adjacent fiber cores. It is interesting to note that present theoretical prediction of the coupling strength of a single-mode MCF is a few orders of magnitude larger than experimentally measured values. We can only speculate that the coupling strength is reduced partly due to random fluctuation of relative phases among neighboring cores and partly due to polarization variation among fiber bores. Since the cross sectional area of a MCF is of several hundred/thousand wavelength square, it is impossible to conduct mode field analysis of these MCFs using commercial software using traditional mode-solving techniques such as the finite-element method or beam propagation method. In this paper, considering the small index contrast in the MCF we propose to develop a rigorous scalar coupled-mode theory (CMT) to analyze mode fields of a given single-mode MCF. The global MCF mode fields are then represented by some linear combination of linear polarized fiber mode field attributed to each single individual fiber core. In the end we have implemented Matlab codes for the MCF under CMT formulation. This program not only computes every eigen-mode of the global MCF waveguide structure it also allows us to study the mode field evolution of the single-mode MCF. As we initially turn on one of the fiber core we are able to observe that the energy gradually spread across all fiber cores according to the governing equation. When combined with new broadband MCF optical amplifiers we may see another ten-fold increase in the capacity of the optical fiber communication system with a minimum increase in cost. Advisors/Committee Members: Chin-Ping Yu (chair), Li-Yin Chen (chair), Hung-Wen Chung (committee member), N. H. Sun (chair).

Subjects/Keywords: coupling length; single-mode multi-core fiber; coupled-mode theory; signal crosstalk; coupling coefficients

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APA (6^th Edition):

Li, Y. (2016). Mode Field Analysis of Single-mode Multi-core Optical Fibers based on Scalar Coupled Mode Theory. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805116-145037

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):

Li, Yi-ling. “Mode Field Analysis of Single-mode Multi-core Optical Fibers based on Scalar Coupled Mode Theory.” 2016. Thesis, NSYSU. Accessed April 14, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805116-145037.

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

MLA Handbook (7^th Edition):

Li, Yi-ling. “Mode Field Analysis of Single-mode Multi-core Optical Fibers based on Scalar Coupled Mode Theory.” 2016. Web. 14 Apr 2021.

Vancouver:

Li Y. Mode Field Analysis of Single-mode Multi-core Optical Fibers based on Scalar Coupled Mode Theory. [Internet] [Thesis]. NSYSU; 2016. [cited 2021 Apr 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805116-145037.

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

Council of Science Editors:

Li Y. Mode Field Analysis of Single-mode Multi-core Optical Fibers based on Scalar Coupled Mode Theory. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0805116-145037

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

Virginia Tech

3. Hill, William Cary. Low Modal Volume Single Crystal Sapphire Optical Fiber.

Degree: PhD, Materials Science and Engineering, 2016, Virginia Tech

URL: http://hdl.handle.net/10919/78792

► This research provides the first known procedure for cleanly and consistently reducing the diameter of single-crystal sapphire optical fiber (SCSF) below the limits of standard… (more)

Subjects/Keywords: Sapphire; single mode; modal volume; optical sensor; optical fiber; single crystal; etching

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APA (6^th Edition):

Hill, W. C. (2016). Low Modal Volume Single Crystal Sapphire Optical Fiber. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/78792

Chicago Manual of Style (16^th Edition):

Hill, William Cary. “Low Modal Volume Single Crystal Sapphire Optical Fiber.” 2016. Doctoral Dissertation, Virginia Tech. Accessed April 14, 2021. http://hdl.handle.net/10919/78792.

MLA Handbook (7^th Edition):

Hill, William Cary. “Low Modal Volume Single Crystal Sapphire Optical Fiber.” 2016. Web. 14 Apr 2021.

Vancouver:

Hill WC. Low Modal Volume Single Crystal Sapphire Optical Fiber. [Internet] [Doctoral dissertation]. Virginia Tech; 2016. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10919/78792.

Council of Science Editors:

Hill WC. Low Modal Volume Single Crystal Sapphire Optical Fiber. [Doctoral Dissertation]. Virginia Tech; 2016. Available from: http://hdl.handle.net/10919/78792

NSYSU

4. Chiu, Jin-Chen. Study on Nonlinear Self-Phase Modulation Enhancement in Passive Mode Locked Fiber Laser with Single-Wall Carbon Nanotube Saturable Absorber.

Degree: PhD, Electro-Optical Engineering, 2010, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1220110-183531

► The dependence of thickness and concentration product (TCP) of single-wall carbon nanotubes saturable absorber (SWCNTs SA) on stabilizing and shortening pulse width in passively mode-locked… (more)

▼ The dependence of thickness and concentration product (TCP) of single-wall carbon nanotubes saturable absorber (SWCNTs SA) on stabilizing and shortening pulse width in passively mode-locked erbium-doped fiber ring laser (MLEDFL) was investigated and measured. The TCP represented the amounts of SWCNTs, which the optical beam encountered when passing through the SWCNTs SA. If the TCP was smaller than 8.25 (Î¼m x wt%), the spectral bandwidth was below 2 nm. The pulse shaping was dominated by its own self amplitude modulation (SAM) of SWCNTs SA. With further increasing TCP, the soliton-like ML operation was achieved and the spectral bandwidth was expanded to 6 nm. For soliton-like mode locking (ML) operation, the area theorem dominated the pulse shaping. Through area theorem analysis, the estimation of SPM increased as the TCP increased. The adequate enhanced SPM for balancing the slight negative GVD was provided to generate soliton-like ML pulses shorten the pulse width. However, as the TCP increased, the soliton pulse energy decreased. The decreasing soliton pulse energy restricted the further pulse shortening. The results showed that the dependence of the pulse energy and nonlinear self phase modulation (SPM) on TCP enabled to determine the shortest pulse width in MLEDFL based on the area theorem. At optimized TCP of 70.93 (Î¼m x wt%), it was found that the shortest pulse width of 418 fs. In addition, based on the estimated SPM from area theorem, the nonlinear refractive index n2 was calculated at the level of 0.4 - 1 x 10^-15 m²/W that was close to the literature values of 10^-15 - 10^-16 m2/W. It provides another way to estimate the nonlinear refractive index except for the Z-scan measurement. We could also estimate the SPM if an active Z-scan measurement was taken to obtain the nonlinear refractive index of the sample. We realized the trend of pulse energy through few samples in MLEDFL, the behavior of pulse width could be theoretically simulated based on area theorem. Hence, with the area theorem analysis, the optimized TCP of SWCNTs SA could be simulated and estimated to generate the shortest pulse width from the trends of pulse energy and estimated SPM. The significant effect of TCP on pulse energy, SPM, pulse width, and spectral bandwidth of MLFLs suggests that the TCP represents the total amount of SWCNTs in SA, which can be used as one of key parameters for characterizing the passive MLFL pulse width. Through the study of the dependence of TCP on ML pulses in MLEDFL, it may provide a guideline to fabricate an effective SWCNTs SA to generate the shortest pulse width of the MLEDFL. Advisors/Committee Members: Chi-Kuang Sun (chair), Shiuh Chao (chair), Gong-Ru Lin (chair), Chao-Kuei Lee (chair), Ci-Ling Pan (chair), Wood-Hi Cheng (committee member), Way-Seen Wang (chair), Chao-Yung Yeh (chair), Yin-Chieh Lai (chair).

Subjects/Keywords: Self-Phase Modulation; Mode Locked Fiber Laser; Single-Wall Carbon Nanotube

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APA (6^th Edition):

Chiu, J. (2010). Study on Nonlinear Self-Phase Modulation Enhancement in Passive Mode Locked Fiber Laser with Single-Wall Carbon Nanotube Saturable Absorber. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1220110-183531

Chicago Manual of Style (16^th Edition):

Chiu, Jin-Chen. “Study on Nonlinear Self-Phase Modulation Enhancement in Passive Mode Locked Fiber Laser with Single-Wall Carbon Nanotube Saturable Absorber.” 2010. Doctoral Dissertation, NSYSU. Accessed April 14, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1220110-183531.

MLA Handbook (7^th Edition):

Chiu, Jin-Chen. “Study on Nonlinear Self-Phase Modulation Enhancement in Passive Mode Locked Fiber Laser with Single-Wall Carbon Nanotube Saturable Absorber.” 2010. Web. 14 Apr 2021.

Vancouver:

Chiu J. Study on Nonlinear Self-Phase Modulation Enhancement in Passive Mode Locked Fiber Laser with Single-Wall Carbon Nanotube Saturable Absorber. [Internet] [Doctoral dissertation]. NSYSU; 2010. [cited 2021 Apr 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1220110-183531.

Council of Science Editors:

Chiu J. Study on Nonlinear Self-Phase Modulation Enhancement in Passive Mode Locked Fiber Laser with Single-Wall Carbon Nanotube Saturable Absorber. [Doctoral Dissertation]. NSYSU; 2010. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1220110-183531

NSYSU

5. Wang, Cheng-Yu. A Study of Single-mode Fiber Interferometer Applied to Near-field Intensity and Phase Distributions of Laser Diodes.

Degree: Master, Communications Engineering, 2011, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0801111-151841

► In the literatures of investigating the coupling mechanism between laser diodes and fibers, Gaussian beam profile was used to describe the propagation of laser beams.… (more)

▼ In the literatures of investigating the coupling mechanism between laser diodes and fibers, Gaussian beam profile was used to describe the propagation of laser beams. But the real laser diode beams exist astigmatism. In order to understand the distributions of real laser diode beams, we used single-mode fiber interferometer to measure the near-field intensity and phase distributions of laser diodes. The nanometer aperture of taper fiber was used to scan through the horizontal and vertical directions across the maximal intensity point of the planes which were perpendicular to propagation axis to measure the intensity and phase distributions of laser diodes. In the measurement of phase distributions, these two single-mode fibers produced interference fringes through accepting laser beams. When the taper fiber scanned the optical field and the reference fiber kept a fixed distance from a laser diode for a stationary phase, the interference fringes shifted because of the phase difference of laser diodes change. In the measurement, in order to improve the stability of interference fringes and consider the aperture of taper fiber, we altered some experiment frameworks. There were four types of experimental framework. According to the experiment results of the near-field measurements, the measured beam widths along the horizontal and vertical directions at the laser diode facet were 4.11 Î¼m and 1.57 Î¼m respectively. The measured wavefront radius curvature were 6.59 Î¼m and 2.96 Î¼m in horizontal axis and vertical axis respectively. After Gaussian beam fitting, the beam widths along the horizontal and vertical directions at the laser diode facet were 4.04 Î¼m and 0.83 Î¼m respectively. The difference in beam widths between measured values and Gaussian fitting were 0.07 Î¼m and 0.74 Î¼m. The measured beam widths and the Gaussian beam curve fitting had similar results. We could see that the beam spread tendency in the z-axis for the laser beam which propagated in the z direction. In the phase distribution measurement, the measured wavefront radius curvatures and the theoretically calculated Gaussian beam values had a slight difference. The calculated wavefront radius curvatures at the laser diode facet were 11921.51 Î¼m and 3.48 Î¼m in horizontal axis and vertical axis respectively. They were 1809 times and 1.2 times of the measured values. The aperture of taper fiber was expanded because of the energy of laser beams, which also caused the spatial resolution degeneration. Moreover, the wavefront radius curvature in horizontal direction was biggish so the measurement framework also limited the ability of the phase distribution measurement. The above points were the reasons to cause the error of the phase distribution measurement. Furthermore, the measurement of the laser diode facet is under investigation. Advisors/Committee Members: Gong-Ru Lin (chair), Hsin-Hui Kuo (chair), Sheng-Lung Huang (chair), Wood-Hi Cheng (committee member), Ching-Ting Lee (chair).

Subjects/Keywords: laser diode; single-mode fiber interferometer; near-field measurement

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APA (6^th Edition):

Wang, C. (2011). A Study of Single-mode Fiber Interferometer Applied to Near-field Intensity and Phase Distributions of Laser Diodes. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0801111-151841

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):

Wang, Cheng-Yu. “A Study of Single-mode Fiber Interferometer Applied to Near-field Intensity and Phase Distributions of Laser Diodes.” 2011. Thesis, NSYSU. Accessed April 14, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0801111-151841.

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

MLA Handbook (7^th Edition):

Wang, Cheng-Yu. “A Study of Single-mode Fiber Interferometer Applied to Near-field Intensity and Phase Distributions of Laser Diodes.” 2011. Web. 14 Apr 2021.

Vancouver:

Wang C. A Study of Single-mode Fiber Interferometer Applied to Near-field Intensity and Phase Distributions of Laser Diodes. [Internet] [Thesis]. NSYSU; 2011. [cited 2021 Apr 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0801111-151841.

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

Council of Science Editors:

Wang C. A Study of Single-mode Fiber Interferometer Applied to Near-field Intensity and Phase Distributions of Laser Diodes. [Thesis]. NSYSU; 2011. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0801111-151841

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

NSYSU

6. Lin, Kuan-Ting. Improved Fiber Sensor by Using a Double-MZI Structure.

Degree: Master, Electro-Optical Engineering, 2017, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0717117-163854

► We propose a double-MZI fiber sensor made by offset fusing and overlap fusing. They can be used for environment sensing, including temperature, refractive index, and… (more)

Subjects/Keywords: single mode fiber; offset; taper; Mach-Zehnder interferometer; fiber sensor

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

APA (6^th Edition):

Lin, K. (2017). Improved Fiber Sensor by Using a Double-MZI Structure. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0717117-163854

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):

Lin, Kuan-Ting. “Improved Fiber Sensor by Using a Double-MZI Structure.” 2017. Thesis, NSYSU. Accessed April 14, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0717117-163854.

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

MLA Handbook (7^th Edition):

Lin, Kuan-Ting. “Improved Fiber Sensor by Using a Double-MZI Structure.” 2017. Web. 14 Apr 2021.

Vancouver:

Lin K. Improved Fiber Sensor by Using a Double-MZI Structure. [Internet] [Thesis]. NSYSU; 2017. [cited 2021 Apr 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0717117-163854.

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

Council of Science Editors:

Lin K. Improved Fiber Sensor by Using a Double-MZI Structure. [Thesis]. NSYSU; 2017. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0717117-163854

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

7. A. KALYANASUNDARAM. AN INVESTIGATION TO ENHANCE THE COUPLING EFFICIENCY BETWEEN LASER DIODE AND SINGLE MODE FIBRE VIA MICROLENS IN MICROOPTICS;.

Degree: Physics, 2014, Periyar University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/20399

An investigation on the performance of distributed index microlenses newline

Advisors/Committee Members: Dr. P. M. Anbarasan.

Subjects/Keywords: LASER DIODE; SINGLE MODE FIBRE

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APA (6^th Edition):

KALYANASUNDARAM, A. (2014). AN INVESTIGATION TO ENHANCE THE COUPLING EFFICIENCY BETWEEN LASER DIODE AND SINGLE MODE FIBRE VIA MICROLENS IN MICROOPTICS;. (Thesis). Periyar University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/20399

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):

KALYANASUNDARAM, A.. “AN INVESTIGATION TO ENHANCE THE COUPLING EFFICIENCY BETWEEN LASER DIODE AND SINGLE MODE FIBRE VIA MICROLENS IN MICROOPTICS;.” 2014. Thesis, Periyar University. Accessed April 14, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/20399.

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

MLA Handbook (7^th Edition):

KALYANASUNDARAM, A.. “AN INVESTIGATION TO ENHANCE THE COUPLING EFFICIENCY BETWEEN LASER DIODE AND SINGLE MODE FIBRE VIA MICROLENS IN MICROOPTICS;.” 2014. Web. 14 Apr 2021.

Vancouver:

KALYANASUNDARAM A. AN INVESTIGATION TO ENHANCE THE COUPLING EFFICIENCY BETWEEN LASER DIODE AND SINGLE MODE FIBRE VIA MICROLENS IN MICROOPTICS;. [Internet] [Thesis]. Periyar University; 2014. [cited 2021 Apr 14]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/20399.

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

Council of Science Editors:

KALYANASUNDARAM A. AN INVESTIGATION TO ENHANCE THE COUPLING EFFICIENCY BETWEEN LASER DIODE AND SINGLE MODE FIBRE VIA MICROLENS IN MICROOPTICS;. [Thesis]. Periyar University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/20399

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

Addis Ababa University

8. Abebaw, Abun. INVESTIGATION OF VARIATION OF NORMALIZED V-PARAMETER WITH WAVE LENGTH IN AN OPTICAL FIBER .

Degree: 2013, Addis Ababa University

URL: http://etd.aau.edu.et/dspace/handle/123456789/1327

► In the modern world the use of optical ber is extending from optical communication to medical science. How ever,in long haul communication the problems of… (more)

Subjects/Keywords: :single mode ber; cut of frequency; laser light; Optical fiber losses

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APA (6^th Edition):

Abebaw, A. (2013). INVESTIGATION OF VARIATION OF NORMALIZED V-PARAMETER WITH WAVE LENGTH IN AN OPTICAL FIBER . (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/1327

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):

Abebaw, Abun. “INVESTIGATION OF VARIATION OF NORMALIZED V-PARAMETER WITH WAVE LENGTH IN AN OPTICAL FIBER .” 2013. Thesis, Addis Ababa University. Accessed April 14, 2021. http://etd.aau.edu.et/dspace/handle/123456789/1327.

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

MLA Handbook (7^th Edition):

Abebaw, Abun. “INVESTIGATION OF VARIATION OF NORMALIZED V-PARAMETER WITH WAVE LENGTH IN AN OPTICAL FIBER .” 2013. Web. 14 Apr 2021.

Vancouver:

Abebaw A. INVESTIGATION OF VARIATION OF NORMALIZED V-PARAMETER WITH WAVE LENGTH IN AN OPTICAL FIBER . [Internet] [Thesis]. Addis Ababa University; 2013. [cited 2021 Apr 14]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/1327.

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

Council of Science Editors:

Abebaw A. INVESTIGATION OF VARIATION OF NORMALIZED V-PARAMETER WITH WAVE LENGTH IN AN OPTICAL FIBER . [Thesis]. Addis Ababa University; 2013. Available from: http://etd.aau.edu.et/dspace/handle/123456789/1327

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

University of Notre Dame

9. Jing Zhao. Single Molecule Enzyme Dynamics and Spectroelectrochemistry in Gold-Based Zero-Mode Waveguides</h1>.

Degree: Chemical Engineering, 2013, University of Notre Dame

URL: https://curate.nd.edu/show/44558c99g9c

► The localization of optical fields is a powerful method to reduce spectroscopic background signals and enable studies of single fluorescent molecules. Zero-mode waveguides (ZMWs)… (more)

▼ The localization of optical fields is a powerful method to reduce spectroscopic background signals and enable studies of single fluorescent molecules. Zero-mode waveguides (ZMWs) strongly confine optical fields to zeptoliter volumes and are coupled with fluorescence microscopy to study the dynamics of single enzyme molecules, due to their excellent optical confinement, precise positioning, and massive parallelism. The work presented exploits arrays of Au-based nanopores derivatized with single copies of the redox enzyme, monomeric sarcosine oxidase (MSOX). MSOX contains a covalently bound flavin adenine dinucleotide (FAD) cofactor which is highly fluorescent in the oxidized state and dark in the reduced state, thus producing a characteristic on-off fluorescence signal synchronous with transitions between oxidation states. Although Al is the common choice for metallic overlayer in ZMW construction, Au is used here to access its unique surface-binding chemistry. In particular, the signal-to-noise ratio is improved for Au-based ZMWs by selective Au passivation. For MSOX reactions involving both the nominal substrate (sarcosine) and an analogous substrate (proline), statistical analyses of single-molecule temporal trajectories reveal the static heterogeneity of single enzyme reaction rates. In addition, the single molecule data confirm the independence of reductive and oxidative reactions. These structures open the way for systematic studies of the effect of molecular crowding on enzyme dynamics. The features of ZMWs are extended to single molecule electrocatalysis. In contrast to its behavior in flavoenzymes, where the transitions are coupled to chemical redox events, the research presented here studies single FAD molecules that are chemically immobilized to the Au region of a ZMW array through a pyrroloquinoline quinone (PQQ) linker. In this structure, the Au functions both to confine the optical field in the ZMW and as the working electrode in a potentiostatically controlled 3-elecrode system, thus allowing potential-dependent blinking to be studied in single FAD molecules. The subset of ZMW nanopores housing a single molecule are identified statistically, and these are subjected to detailed study. Using equilibrium potential, Eeq, values determined from macroscopic planar Au electrodes, single molecule blinking behavior is characterized at potentials E < Eeq, E ~ Eeq, and E > Eeq. The probability of observing a reduced (oxidized) state is observed to increase (decrease) as the potential is scanned cathodic of Eeq. This is understood to reflect the potential-dependent probability of electron transfer for single FAD molecules. Furthermore, the observed transition rate reaches a maximum near Eeq and decreases to either anodic or cathodic values, as expected, since the rate is dependent on having significant probabilities for both redox states, a condition that obtains only near Eeq. Advisors/Committee Members: Paul Bohn, Committee Member, Gregory Hartland, Committee Member, William Phillip, Committee Member, David Leighton, Committee Member.

Subjects/Keywords: spectroelectrochemistry; fluorescence; enzyme dynamics; single molecules; zero-mode waveguide

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APA (6^th Edition):

Zhao, J. (2013). Single Molecule Enzyme Dynamics and Spectroelectrochemistry in Gold-Based Zero-Mode Waveguides</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/44558c99g9c

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):

Zhao, Jing. “Single Molecule Enzyme Dynamics and Spectroelectrochemistry in Gold-Based Zero-Mode Waveguides</h1>.” 2013. Thesis, University of Notre Dame. Accessed April 14, 2021. https://curate.nd.edu/show/44558c99g9c.

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

MLA Handbook (7^th Edition):

Zhao, Jing. “Single Molecule Enzyme Dynamics and Spectroelectrochemistry in Gold-Based Zero-Mode Waveguides</h1>.” 2013. Web. 14 Apr 2021.

Vancouver:

Zhao J. Single Molecule Enzyme Dynamics and Spectroelectrochemistry in Gold-Based Zero-Mode Waveguides</h1>. [Internet] [Thesis]. University of Notre Dame; 2013. [cited 2021 Apr 14]. Available from: https://curate.nd.edu/show/44558c99g9c.

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

Council of Science Editors:

Zhao J. Single Molecule Enzyme Dynamics and Spectroelectrochemistry in Gold-Based Zero-Mode Waveguides</h1>. [Thesis]. University of Notre Dame; 2013. Available from: https://curate.nd.edu/show/44558c99g9c

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

University of Illinois – Urbana-Champaign

10. O'brien, Thomas. High-power single-mode vertical-cavity surface-emitting lasers.

Degree: MS, 1200, 2012, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/32019

► Since their invention in 1979, vertical-cavity surface-emitting lasers (VCSELs) have been the focus of many research efforts due to the wide applicability of so many… (more)

▼ Since their invention in 1979, vertical-cavity surface-emitting lasers (VCSELs) have been the focus of many research efforts due to the wide applicability of so many of their features. Those that operate in the single-mode regime with sufficiently high power are of particular interest because of the need for an energy-efficient solution to the shrinking bit size in hard disk drives. This work addresses this problem by a careful study of the state-of-the-art approaches to high-power single-mode lasing and by integrating the fundamental operating principles into new, novel approaches. The design rules, optimization parameters, fabrication, and characterization of three different structures are presented with an in-depth analysis of performance and future improvement. The devices presented include the metallic spatial filter, the extended pillar design with experimental verification of optimized higher order mode loss, and the surface relief design with an experimentally verified model. The metallic spatial filter is found to show peak output power near 12 mW with a transverse mode spacing of only a few angstroms. The extended pillar design is presented as an improvement over the metallic spatial filter, along with a systematic approach to suppressing the lasing behavior of higher order modes within the cavity. By removing the high reflectivity around the perimeter of the cavity, over 40 mW of single-peak power and 3 mW of single-mode power are attained. An experimental optimization of the oxidation aperture with regard to the size of the external pillar is also presented. Finally, the surface relief structure is presented with full two-dimensional design simulations. Single-mode power near 3 mW with a very low threshold of below 5 mA is shown along with experimental verification of modeling results. In addition, the metallic surface relief design is proposed as a future improvement, along with some preliminary modeling results. Advisors/Committee Members: Chuang, Shun-Lien (advisor).

Subjects/Keywords: vertical-cavity surface-emitting lasers (VCSEL); Single-Mode; High-Power

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APA (6^th Edition):

O'brien, T. (2012). High-power single-mode vertical-cavity surface-emitting lasers. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/32019

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

Chicago Manual of Style (16^th Edition):

O'brien, Thomas. “High-power single-mode vertical-cavity surface-emitting lasers.” 2012. Thesis, University of Illinois – Urbana-Champaign. Accessed April 14, 2021. http://hdl.handle.net/2142/32019.

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

MLA Handbook (7^th Edition):

O'brien, Thomas. “High-power single-mode vertical-cavity surface-emitting lasers.” 2012. Web. 14 Apr 2021.

Vancouver:

O'brien T. High-power single-mode vertical-cavity surface-emitting lasers. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2012. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/2142/32019.

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

Council of Science Editors:

O'brien T. High-power single-mode vertical-cavity surface-emitting lasers. [Thesis]. University of Illinois – Urbana-Champaign; 2012. Available from: http://hdl.handle.net/2142/32019

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

University of Illinois – Urbana-Champaign

11. O'Brien, Jr, Thomas R. High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering.

Degree: PhD, Electrical & Computer Engr, 2017, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/99460

► Design principles of impurity-induced disordered (IID) vertical-cavity surface-emitting lasers (VCSELs) are presented, including the influence of IID on electrical, optical, and mode-control properties. A transfer… (more)

▼ Design principles of impurity-induced disordered (IID) vertical-cavity surface-emitting lasers (VCSELs) are presented, including the influence of IID on electrical, optical, and mode-control properties. A transfer matrix method (TMM) is developed to account for the diffusion of Group III atoms of the distributed Bragg reflectors (DBR) that comprise the VCSEL. In addition, a simple fiber model is used to design the transverse profile of the IID regions to maximize single-mode output power. IID VCSELs are fabricated with special attention given to the experimental parameters that affect both the lateral zinc diffusion profile and the level of intermixing caused by impurity diffusion. The resulting devices are compared to standard oxide-confined VCSELs and show lower operating voltage due to reduced contact and series resistance, higher operation ranges due to reduced thermal effects, and improved single-mode output due to the IID filter. Additionally, the optimal design for maximum single-mode output is experimentally determined by varying the dimensions of the IID aperture for a fixed oxide confinement size. Devices with an IID:Oxide ratio of 1.3:3 perform the best, yielding 1.6 mW of single-mode power and maintaining single-mode output for most of their operating range. Because of the discrepancy between the simple model’s prediction and the experimental results, a more complex mode-matching model is developed to capture the physics of the tapered IID aperture. Experimental control of the modeled optimal IID aperture is then investigated by sweeping the stress of the IID mask films. Finally, a single-interface mode-matching model is used to explore the viability of a metallic surface-relief VCSEL. This new mode-filtering mechanism would allow vertical integrability of multiple filtering mechanisms as well as alleviate current crowding issues often caused by surface etching and cavity damage. Advisors/Committee Members: Dallesasse, John M (advisor), Dallesasse, John M (Committee Chair), Feng, Milton (committee member), Nahrstedt, Klara (committee member), Bayram, Can (committee member).

Subjects/Keywords: Vertical-cavity; Surface-emitting; Impurity-induced disordering; Zn diffusion; Single-mode

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APA (6^th Edition):

O'Brien, Jr, T. R. (2017). High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/99460

Chicago Manual of Style (16^th Edition):

O'Brien, Jr, Thomas R. “High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering.” 2017. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 14, 2021. http://hdl.handle.net/2142/99460.

MLA Handbook (7^th Edition):

O'Brien, Jr, Thomas R. “High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering.” 2017. Web. 14 Apr 2021.

Vancouver:

O'Brien, Jr TR. High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/2142/99460.

Council of Science Editors:

O'Brien, Jr TR. High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/99460

University of Arizona

12. Xu, Qian. Time-Resolved Particle Image Velocimetry Measurements of the 3D Single-Mode Richtmyer-Meshkov Instability .

Degree: 2016, University of Arizona

URL: http://hdl.handle.net/10150/623084

► The Richtmyer-Meshkov Instability (RMI) (Commun. Pure Appl. Math 23, 297-319, 1960; Izv. Akad. Nauk. SSSR Maekh. Zhidk. Gaza. 4, 151-157, 1969) occurs due to an… (more)

▼ The Richtmyer-Meshkov Instability (RMI) (Commun. Pure Appl. Math 23, 297-319, 1960; Izv. Akad. Nauk. SSSR Maekh. Zhidk. Gaza. 4, 151-157, 1969) occurs due to an impulsive acceleration acting on a perturbed interface between two fluids of different densities. In the experiments presented in this thesis, single mode 3D RMI experiments are performed. An oscillating speaker generates a single mode sinusoidal initial perturbation at an interface of two gases, air and SF6. A Mach 1.19 shock wave accelerates the interface and generates the Richtmyer-Meshkov Instability. Both gases are seeded with propylene glycol particles which are illuminated by an Nd: YLF pulsed laser. Three high-speed video cameras record image sequences of the experiment. Particle Image Velocimetry (PIV) is applied to measure the velocity field. Measurements of the amplitude for both spike and bubble are obtained, from which the growth rate is measured. For both spike and bubble experiments, amplitude and growth rate match the linear stability theory at early time, but fall into a non-linear region with amplitude measurements lying between the modified 3D Sadot et al. model (Phys. Rev. Lett. 80, 1654-1657, 1998) and the Zhang & Sohn model (Phys. Fluids 9. 1106-1124, 1997; Z. Angew. Math Phys 50. 1-46, 1990) at late time. Amplitude and growth rate curves are found to lie above the modified 3D Sadot et al. model and below Zhang & Sohn model for the spike experiments. Conversely, for the bubble experiments, both amplitude and growth rate curves lie above the Zhang & Sohn model, and below the modified 3D Sadot et al. model. Circulation is also calculated using the vorticity and velocity fields from the PIV measurements. The calculated circulation are approximately equal and found to grow with time, a result that differs from the modified Jacobs and Sheeley's circulation model (Phys. Fluids 8, 405-415, 1996). Advisors/Committee Members: Jacobs, Jeffrey W (advisor), Jacobs, Jeffrey W. (committeemember), Li, Peiwen (committeemember), Little, Jesse C. (committeemember).

Subjects/Keywords: Particle Image Velocimetry; PIV; Richtmyer-Meshkov Instability; Single Mode; 3D

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APA (6^th Edition):

Xu, Q. (2016). Time-Resolved Particle Image Velocimetry Measurements of the 3D Single-Mode Richtmyer-Meshkov Instability . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/623084

Chicago Manual of Style (16^th Edition):

Xu, Qian. “Time-Resolved Particle Image Velocimetry Measurements of the 3D Single-Mode Richtmyer-Meshkov Instability .” 2016. Masters Thesis, University of Arizona. Accessed April 14, 2021. http://hdl.handle.net/10150/623084.

MLA Handbook (7^th Edition):

Xu, Qian. “Time-Resolved Particle Image Velocimetry Measurements of the 3D Single-Mode Richtmyer-Meshkov Instability .” 2016. Web. 14 Apr 2021.

Vancouver:

Xu Q. Time-Resolved Particle Image Velocimetry Measurements of the 3D Single-Mode Richtmyer-Meshkov Instability . [Internet] [Masters thesis]. University of Arizona; 2016. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10150/623084.

Council of Science Editors:

Xu Q. Time-Resolved Particle Image Velocimetry Measurements of the 3D Single-Mode Richtmyer-Meshkov Instability . [Masters Thesis]. University of Arizona; 2016. Available from: http://hdl.handle.net/10150/623084

University of Arizona

13. Lai, Yi-Ying. Injection-locked Optically Pumped Semiconductor Laser .

Degree: 2015, University of Arizona

URL: http://hdl.handle.net/10150/577280

► High-power, single-frequency, narrow-linewidth lasers emitting at tailored wavelength are desired for many applications, especially for precision spectroscopy. By way of a free-space resonator, optically pumped… (more)

▼ High-power, single-frequency, narrow-linewidth lasers emitting at tailored wavelength are desired for many applications, especially for precision spectroscopy. By way of a free-space resonator, optically pumped semiconductor lasers (OPSLs), a.k.a. vertical external-cavity surface-emitting lasers (VECSELs), can provide near diffraction-limited, high-quality Gaussian beams and are scalable in output power. Free space resonators also allow the insertion of the birefringent filter and the etalon to enforce single-frequency operation. In addition, the emission wavelengths of OPSLs are tailorable through bandgap engineering. These advantages above make OPSL a strong candidate of laser sources for spectroscopic applications including atomic spectroscopy as well as optical lattice clocks. In this research, a single-frequency laser source with high power is demonstrated by applying the injection-locking technique on OPSLs for the first time. The behaviors of the injection-locked OPSL are studied by varying parameters such as output coupling, injection wavelengths and injection power. It was found that the best injection wavelength is by approximately 2 nm shorter than the free-running slave laser at any given pump power. Below the lasing threshold for free-running operation, the laser starts the stimulated emission process as soon as it is pumped, working as a resonant amplifier. With proper parameters, the output power of the injection-locked laser exceeds the output power of its free-running condition. Over 9 W of single-frequency output power at 1015 nm is achieved. The output beam is near-diffraction-limited with Mₓ² = 1.04 and My² = 1.02. By analyzing the surface photoluminescence (PL) and the output performance of the laser, the saturation intensity of OPSLs is estimated to be 100 kW/cm² when the passive loss of 1.4% is assumed. The injection-locked system adds fairly low phase noise to that of the master laser. By measuring the beat note between the master laser and the injection-locked laser, the RMS values of the phase noise are 0.112 rad and 0.081 rad when using the T = 3% and T = 4% output couplers respectively. Advisors/Committee Members: Kaneda, Yushi (advisor), Jones, Ronald Jason (advisor), Kaneda, Yushi (committeemember), Jones, Ronald Jason (committeemember), Moloney, Jerome V. (committeemember).

Subjects/Keywords: lasers; OPSL; semiconductor lasers; single-mode; VECSEL; Optical Sciences; injection-locked

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APA (6^th Edition):

Lai, Y. (2015). Injection-locked Optically Pumped Semiconductor Laser . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/577280

Chicago Manual of Style (16^th Edition):

Lai, Yi-Ying. “Injection-locked Optically Pumped Semiconductor Laser .” 2015. Doctoral Dissertation, University of Arizona. Accessed April 14, 2021. http://hdl.handle.net/10150/577280.

MLA Handbook (7^th Edition):

Lai, Yi-Ying. “Injection-locked Optically Pumped Semiconductor Laser .” 2015. Web. 14 Apr 2021.

Vancouver:

Lai Y. Injection-locked Optically Pumped Semiconductor Laser . [Internet] [Doctoral dissertation]. University of Arizona; 2015. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10150/577280.

Council of Science Editors:

Lai Y. Injection-locked Optically Pumped Semiconductor Laser . [Doctoral Dissertation]. University of Arizona; 2015. Available from: http://hdl.handle.net/10150/577280

Macquarie University

14. Sarang, Soumya. Gain characteristics in single-mode pumped diamond Raman lasers.

Degree: 2018, Macquarie University

URL: http://hdl.handle.net/1959.14/1266419

►

Empirical thesis.

Bibliography: pages 165-180.

1. Introduction – 2. Conceptual framework and cavity design – 3. Continuous wave external cavity KYW Raman laser – 4.… (more)

▼

Empirical thesis.

Bibliography: pages 165-180.

1. Introduction – 2. Conceptual framework and cavity design – 3. Continuous wave external cavity KYW Raman laser – 4. Single longitudinal mode diamond Raman lasers – 5. Second Stokes SLM laser – 6. Active cavity length stabilisation – 7. Conclusion – Appendices – References.

Single longitudinal mode (SLM) lasers are significant for applications in spectroscopy, precision measurements, and high-resolution interferometry. The techniques for achieving SLM in inversion lasers are well-developed, as are also frequency extension by frequency conversion using harmonic crystals and optical parametric oscillators. In contrast, Raman lasers, which are well-known for having advantages for diversifying wavelength range and producing high-quality output beams, are much more immature in terms of SLM operation.

This thesis presents an experimental approach to demonstrate SLM operation in a standing wave crystalline Raman laser. Theoretical concepts are developed to elucidate the gain saturation mechanisms and mode competition in Raman lasers. It is shown that gain saturation is homogeneous for narrow linewidth pumping and that the absence of spatial hole burning in a Raman gain medium leads to the possibility of intrinsically stable SLM operation.This concept is implemented in narrow-line width pumped external cavity Raman lasers in the continuous wave regime. Two Raman crystals –diamond and potassium yttrium tungstate (KYW) are investigated to understand the effects of material properties on longitudinal mode structure.

In the case of KYW, it is seen that the laser output spectrum and efficiency were greatly influenced by a lesser-known low-frequency phonon mode (87 cm–1), which is shown to havehigh gain coefficient higher than the mode currently accepted as the primary mode. Owing to the complexity of the laser output spectrum due to the participation of this low-frequency mode in the Raman frequency conversion process, investigation of the mode spectrum was challenging. However, the low-frequency mode at 87 cm–1 is advantageous for applications requiring multi-wavelength laser sources. As the quantum defect is much lower than for the conventional phonon modes in Raman crystals, it could be used for beam enhancement and/or beam combination.

Diamond is seen as a much better option for investigating SLM as it has a "pure" single phonon mode, in addition to its high Raman gain and superior thermal conductivity. Despite having 35 longitudinal modes in the diamond gain bandwidth (45 GHz), SLM operation is demonstrated at 1240 nm up to 4 W of Stokes output power for the free-running diamond Raman laser. Moreover, this SLM demonstration is significant as the gain medium wa spositioned at the midpoint of the standing-wave cavity, which would normally be unsuited to SLM operation in the case of an inversion laser. The pumping level and output power of this SLM operation are higher than the reported SLM inversion lasers. The coupling between the intracavity Stokes…

Advisors/Committee Members: Macquarie University. Department of Physics and Astronomy.

Subjects/Keywords: Raman lasers; raman lasers; diamond; single longitudinal mode

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APA (6^th Edition):

Sarang, S. (2018). Gain characteristics in single-mode pumped diamond Raman lasers. (Doctoral Dissertation). Macquarie University. Retrieved from http://hdl.handle.net/1959.14/1266419

Chicago Manual of Style (16^th Edition):

Sarang, Soumya. “Gain characteristics in single-mode pumped diamond Raman lasers.” 2018. Doctoral Dissertation, Macquarie University. Accessed April 14, 2021. http://hdl.handle.net/1959.14/1266419.

MLA Handbook (7^th Edition):

Sarang, Soumya. “Gain characteristics in single-mode pumped diamond Raman lasers.” 2018. Web. 14 Apr 2021.

Vancouver:

Sarang S. Gain characteristics in single-mode pumped diamond Raman lasers. [Internet] [Doctoral dissertation]. Macquarie University; 2018. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/1959.14/1266419.

Council of Science Editors:

Sarang S. Gain characteristics in single-mode pumped diamond Raman lasers. [Doctoral Dissertation]. Macquarie University; 2018. Available from: http://hdl.handle.net/1959.14/1266419

University of Kansas

15. Armendariz, Kevin P. Model membranes as a tool for biological studies and biosensor applications.

Degree: PhD, Chemistry, 2013, University of Kansas

URL: http://hdl.handle.net/1808/14205

► The biological membrane is a fundamental cellular structure which forms the natural selective barrier separating cells from their environment. Model membranes have long been employed… (more)

Subjects/Keywords: Analytical chemistry; Bioassay; Fluorescence; Membrane; Orientation; Single molecule; Whispering gallery mode

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APA (6^th Edition):

Armendariz, K. P. (2013). Model membranes as a tool for biological studies and biosensor applications. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/14205

Chicago Manual of Style (16^th Edition):

Armendariz, Kevin P. “Model membranes as a tool for biological studies and biosensor applications.” 2013. Doctoral Dissertation, University of Kansas. Accessed April 14, 2021. http://hdl.handle.net/1808/14205.

MLA Handbook (7^th Edition):

Armendariz, Kevin P. “Model membranes as a tool for biological studies and biosensor applications.” 2013. Web. 14 Apr 2021.

Vancouver:

Armendariz KP. Model membranes as a tool for biological studies and biosensor applications. [Internet] [Doctoral dissertation]. University of Kansas; 2013. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/1808/14205.

Council of Science Editors:

Armendariz KP. Model membranes as a tool for biological studies and biosensor applications. [Doctoral Dissertation]. University of Kansas; 2013. Available from: http://hdl.handle.net/1808/14205

Georgia Tech

16. Zhang, Rui. Integration of optoelectronics interconnects on glass interposers for high speed communications.

Degree: PhD, Electrical and Computer Engineering, 2020, Georgia Tech

URL: http://hdl.handle.net/1853/64135

► The development and application of artificial intelligence and augmented reality as well as billions of new devices connected to the network have resulted in unprecedented… (more)

Subjects/Keywords: Optoelectronics interconnects; Glass interposers; Microvias; Single mode waveguides; Fiber integration

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APA (6^th Edition):

Zhang, R. (2020). Integration of optoelectronics interconnects on glass interposers for high speed communications. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/64135

Chicago Manual of Style (16^th Edition):

Zhang, Rui. “Integration of optoelectronics interconnects on glass interposers for high speed communications.” 2020. Doctoral Dissertation, Georgia Tech. Accessed April 14, 2021. http://hdl.handle.net/1853/64135.

MLA Handbook (7^th Edition):

Zhang, Rui. “Integration of optoelectronics interconnects on glass interposers for high speed communications.” 2020. Web. 14 Apr 2021.

Vancouver:

Zhang R. Integration of optoelectronics interconnects on glass interposers for high speed communications. [Internet] [Doctoral dissertation]. Georgia Tech; 2020. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/1853/64135.

Council of Science Editors:

Zhang R. Integration of optoelectronics interconnects on glass interposers for high speed communications. [Doctoral Dissertation]. Georgia Tech; 2020. Available from: http://hdl.handle.net/1853/64135

NSYSU

17. Cheng, Gia-Ling. The Study of Growth Few-Mode and Single-Mode Cr4+:YAG Crystal Fibers with High-Index Cladding.

Degree: Master, Electro-Optical Engineering, 2015, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0615115-131817

► In this study, we have successfully fabricated the few-mode and the single-mode Cr4+:YAG crystal fibers with high-index cladding. The single crystal with diameter of 34Î¼m… (more)

Subjects/Keywords: Few-Mode; Laser-heated pedestal growth method (LHPG); Gain; Single-Mode; High-index glass; Cr4+:YAG

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APA (6^th Edition):

Cheng, G. (2015). The Study of Growth Few-Mode and Single-Mode Cr4+:YAG Crystal Fibers with High-Index Cladding. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0615115-131817

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):

Cheng, Gia-Ling. “The Study of Growth Few-Mode and Single-Mode Cr4+:YAG Crystal Fibers with High-Index Cladding.” 2015. Thesis, NSYSU. Accessed April 14, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0615115-131817.

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

MLA Handbook (7^th Edition):

Cheng, Gia-Ling. “The Study of Growth Few-Mode and Single-Mode Cr4+:YAG Crystal Fibers with High-Index Cladding.” 2015. Web. 14 Apr 2021.

Vancouver:

Cheng G. The Study of Growth Few-Mode and Single-Mode Cr4+:YAG Crystal Fibers with High-Index Cladding. [Internet] [Thesis]. NSYSU; 2015. [cited 2021 Apr 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0615115-131817.

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

Council of Science Editors:

Cheng G. The Study of Growth Few-Mode and Single-Mode Cr4+:YAG Crystal Fibers with High-Index Cladding. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0615115-131817

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

Arizona State University

18. Gujja, Aditya. Redundant Skewed Clocking of Pulse-Clocked Latches for Low Power Soft-Error Mitigation.

Degree: Electrical Engineering, 2015, Arizona State University

URL: http://repository.asu.edu/items/36471

► An integrated methodology combining redundant clock tree synthesis and pulse clocked latches mitigates both single event upsets (SEU) and single event transients (SET) with reduced… (more)

Subjects/Keywords: Electrical engineering; Flip-Flop; multiple node charge collection; single event transient; single event upset; temporal hardening; triple mode redundancy

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APA (6^th Edition):

Gujja, A. (2015). Redundant Skewed Clocking of Pulse-Clocked Latches for Low Power Soft-Error Mitigation. (Masters Thesis). Arizona State University. Retrieved from http://repository.asu.edu/items/36471

Chicago Manual of Style (16^th Edition):

Gujja, Aditya. “Redundant Skewed Clocking of Pulse-Clocked Latches for Low Power Soft-Error Mitigation.” 2015. Masters Thesis, Arizona State University. Accessed April 14, 2021. http://repository.asu.edu/items/36471.

MLA Handbook (7^th Edition):

Gujja, Aditya. “Redundant Skewed Clocking of Pulse-Clocked Latches for Low Power Soft-Error Mitigation.” 2015. Web. 14 Apr 2021.

Vancouver:

Gujja A. Redundant Skewed Clocking of Pulse-Clocked Latches for Low Power Soft-Error Mitigation. [Internet] [Masters thesis]. Arizona State University; 2015. [cited 2021 Apr 14]. Available from: http://repository.asu.edu/items/36471.

Council of Science Editors:

Gujja A. Redundant Skewed Clocking of Pulse-Clocked Latches for Low Power Soft-Error Mitigation. [Masters Thesis]. Arizona State University; 2015. Available from: http://repository.asu.edu/items/36471

RMIT University

19. Prokop, C. Air-suspended single-mode polymer waveguides towards highly sensitive optofluidic sensors.

Degree: 2016, RMIT University

URL: http://researchbank.rmit.edu.au/view/rmit:162167

► In this thesis, a polymer lamination method is presented that enables efficient light coupling into air-suspended polymer waveguides by grating couplers which can then be… (more)

▼ In this thesis, a polymer lamination method is presented that enables efficient light coupling into air-suspended polymer waveguides by grating couplers which can then be exploited for research towards a large range of applications in the field of microfluidics, optics and optofluidics. This approach is especially useful for highly sensitive integrated optofluidic sensors as has been demonstrated in this work. Due to the low refractive index contrast available between various polymer materials, the efficiency of miniaturized polymer photonic and optofluidic devices is often limited. In this work, a new lamination technique is presented that allows the bonding of unstructured and structured layers of SU-8 photoresist down to sub-micron thicknesses onto microchannels fabricated in KMPR photoresist using a flexible PDMS carrier stamp. This approach enables the creation of air-suspended SU-8 structures with the highest possible refractive index contrast. Such layers can be bonded down to a thickness of 0.5 µm which in principal allows guidance of light of infrared wavelengths within the single-mode regime. In order to exploit this approach for highly sensitive optofluidic sensing applications, light needs to be coupled into such layers. In this work light coupling is achieved using air-suspended SU-8 rib waveguides and butt coupling, as well as using air-suspended SU-8 surface grating couplers. Particularly, air-suspended SU-8 grating couplers are very interesting. After numerical simulations, air-suspended SU-8 grating couplers have been fabricated based on the developed lamination method. Transmission measurements have shown that a single grating coupler exhibits approximately 8 dB coupling loss at a centre wavelength of 1557 nm indicating a coupling efficiency of about 16%. In addition, the thermal sensitivity of the air-suspended SU-8 grating couplers has been studied by numerical simulations followed by experimental evaluation. Even though the achieved coupling efficiencies are lower than for SOI couplers, mainly due to current fabrication limits of the master structures, the fabrication method employing widely used polymer materials has the advantage that multiple air-suspended structures can directly be created in only one simple lamination process without the need of additional etching steps. Finally, different optofluidic sensor concepts are proposed based on the demonstrated SU-8 bonding method and the air-suspended SU-8 waveguide grating couplers. Experimental transmission measurements have shown that a first sensor concept exhibits a refractive index sensitivity of approximately 400 nm RIU-1 according to the wavelength shift and 17 dB RIU-1 due to the intensity loss which is similar to the results of the numerical simulations. In comparison to previously shown sensing applications using grating coupler structures, the analytes can directly be probed in-line due to the combination of a microfluidic channel and air-suspended grating couplers making the proposed sensor concept highly applicable…

Subjects/Keywords: Fields of Research; Polymer microfabrication; SU-8 onto KMPR lamination; Air-suspended single-mode polymer waveguides; Air-suspended single-mode polymer grating couplers; Highly sensitive optofluidic sensors

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APA (6^th Edition):

Prokop, C. (2016). Air-suspended single-mode polymer waveguides towards highly sensitive optofluidic sensors. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:162167

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):

Prokop, C. “Air-suspended single-mode polymer waveguides towards highly sensitive optofluidic sensors.” 2016. Thesis, RMIT University. Accessed April 14, 2021. http://researchbank.rmit.edu.au/view/rmit:162167.

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

MLA Handbook (7^th Edition):

Prokop, C. “Air-suspended single-mode polymer waveguides towards highly sensitive optofluidic sensors.” 2016. Web. 14 Apr 2021.

Vancouver:

Prokop C. Air-suspended single-mode polymer waveguides towards highly sensitive optofluidic sensors. [Internet] [Thesis]. RMIT University; 2016. [cited 2021 Apr 14]. Available from: http://researchbank.rmit.edu.au/view/rmit:162167.

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

Council of Science Editors:

Prokop C. Air-suspended single-mode polymer waveguides towards highly sensitive optofluidic sensors. [Thesis]. RMIT University; 2016. Available from: http://researchbank.rmit.edu.au/view/rmit:162167

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

NSYSU

20. Lei, Szu-chin. Precision Mechanical Grinding Integrated with Spin-on-Glass Electrostatic Pulling Method for Producing Micro-hyperboloid Lensed Optical Fibers.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2016, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0620116-231528

► A novel approach is presented for producing hyperboloid microlens structure directly on an optical single-mode fiber for enhancing the coupling efficiency between high-power laser diodes… (more)

Subjects/Keywords: coupling efficiency; radius of curvature; microlensed; spin-on-glass; single-mode fiber; electrostatic pulling

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APA (6^th Edition):

Lei, S. (2016). Precision Mechanical Grinding Integrated with Spin-on-Glass Electrostatic Pulling Method for Producing Micro-hyperboloid Lensed Optical Fibers. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0620116-231528

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):

Lei, Szu-chin. “Precision Mechanical Grinding Integrated with Spin-on-Glass Electrostatic Pulling Method for Producing Micro-hyperboloid Lensed Optical Fibers.” 2016. Thesis, NSYSU. Accessed April 14, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0620116-231528.

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

MLA Handbook (7^th Edition):

Lei, Szu-chin. “Precision Mechanical Grinding Integrated with Spin-on-Glass Electrostatic Pulling Method for Producing Micro-hyperboloid Lensed Optical Fibers.” 2016. Web. 14 Apr 2021.

Vancouver:

Lei S. Precision Mechanical Grinding Integrated with Spin-on-Glass Electrostatic Pulling Method for Producing Micro-hyperboloid Lensed Optical Fibers. [Internet] [Thesis]. NSYSU; 2016. [cited 2021 Apr 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0620116-231528.

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

Council of Science Editors:

Lei S. Precision Mechanical Grinding Integrated with Spin-on-Glass Electrostatic Pulling Method for Producing Micro-hyperboloid Lensed Optical Fibers. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0620116-231528

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

NSYSU

21. Liu, Yue-qu. Reconfigurable Design and Implementation of Modular-Construction Based FFT Hardware Architecture.

Degree: Master, Electrical Engineering, 2018, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0016118-164748

► In the 3GPP-LTE communication standard, it defines many kinds of Fast Fourier Transform(FFT) sizes. So, we design a high performance FFT architecture which makes good… (more)

Subjects/Keywords: fast Fourier transform (FFT); 3GPP-LTE; reconfigurable (RC); multi-mode; single-path delay feedback (SDF)

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APA (6^th Edition):

Liu, Y. (2018). Reconfigurable Design and Implementation of Modular-Construction Based FFT Hardware Architecture. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0016118-164748

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):

Liu, Yue-qu. “Reconfigurable Design and Implementation of Modular-Construction Based FFT Hardware Architecture.” 2018. Thesis, NSYSU. Accessed April 14, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0016118-164748.

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

MLA Handbook (7^th Edition):

Liu, Yue-qu. “Reconfigurable Design and Implementation of Modular-Construction Based FFT Hardware Architecture.” 2018. Web. 14 Apr 2021.

Vancouver:

Liu Y. Reconfigurable Design and Implementation of Modular-Construction Based FFT Hardware Architecture. [Internet] [Thesis]. NSYSU; 2018. [cited 2021 Apr 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0016118-164748.

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

Council of Science Editors:

Liu Y. Reconfigurable Design and Implementation of Modular-Construction Based FFT Hardware Architecture. [Thesis]. NSYSU; 2018. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0016118-164748

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

NSYSU

22. Hsu, Huai-hsuan. Double-MZI fiber sensors formed by a central collapse on a hollow-core fiber.

Degree: Master, Electro-Optical Engineering, 2018, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0721118-140642

► Optical Mach-Zehnder interferometer (MZI) fiber sensors have several advantages, such as small size, high sensitivity, and immunity to electromagnetic interference. Several kinds of MZI-based fiber… (more)

Subjects/Keywords: collapsed; Mach-Zehnder interferometer; single mode fiber; fiber sensor; hollow core fiber

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APA (6^th Edition):

Hsu, H. (2018). Double-MZI fiber sensors formed by a central collapse on a hollow-core fiber. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0721118-140642

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):

Hsu, Huai-hsuan. “Double-MZI fiber sensors formed by a central collapse on a hollow-core fiber.” 2018. Thesis, NSYSU. Accessed April 14, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0721118-140642.

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

MLA Handbook (7^th Edition):

Hsu, Huai-hsuan. “Double-MZI fiber sensors formed by a central collapse on a hollow-core fiber.” 2018. Web. 14 Apr 2021.

Vancouver:

Hsu H. Double-MZI fiber sensors formed by a central collapse on a hollow-core fiber. [Internet] [Thesis]. NSYSU; 2018. [cited 2021 Apr 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0721118-140642.

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

Council of Science Editors:

Hsu H. Double-MZI fiber sensors formed by a central collapse on a hollow-core fiber. [Thesis]. NSYSU; 2018. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0721118-140642

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

University of Notre Dame

23. Dane A. Grismer. Single-Molecule Spectroelectrochemical Investigation of Freely Diffusing Redox-Active Fluorophores in Zero-Mode Waveguides</h1>.

Degree: Chemical and Biomolecular Engineering, 2015, University of Notre Dame

URL: https://curate.nd.edu/show/8s45q813n68

► Single-molecule studies with optical techniques have become instrumental in shedding light upon the heterogeneities in molecular property distributions, which are averaged out in ensemble… (more)

▼ Single-molecule studies with optical techniques have become instrumental in shedding light upon the heterogeneities in molecular property distributions, which are averaged out in ensemble measurements. Gaining insights into the nature and magnitude of such heterogeneities in molecular systems, particularly when they are subject to anisotropic chemical, optical, electrical, or other perturbations, has important implications in the design of targeted detection schemes. Strategies that enable detection and manipulation of subpopulations of molecules have the potential to contribute in transformational ways to lab-on-a-chip (LOC) analytical systems and point-of-care (POC) diagnostic devices. The work in this dissertation aims to provide a novel approach for the electrochemical manipulation of redox-active fluorophores coupled with spectroscopic measurements. The design, construction, and utilization of a fluorescence correlation spectroscopy (FCS) optical system for the measurement of freely diffusing single-molecules form the basis for more advanced studies. Piezoelectric stages for nanometer spatial resolution and advanced acquisition hardware for sub-nanosecond temporal resolution are implemented. The fabrication of Au-clad zero-mode waveguide (ZMW) arrays by focused ion beam (FIB) milling is described. Simulations of the decay of the optical field within ZMWs support the basis for single-molecule experiments. Spectroelectrochemical measurements of the redox-active fluorophore, flavin mononucleotide (FMN), were performed at single-molecule concentrations in a bulk solution above an indium tin oxide (ITO) electrode and in the approximately 200 zL observation volumes of individual electrochemical ZMWs (E-ZMWs). Fluorescence analogs of standard electrochemical experiments were implemented. These are fluorescence emission under static control and chronofluorometry as analogs to amperometry, and cyclic potential sweep fluorometry as an analog to cyclic voltammetry. A long-lived semiquinone state of FMN was stabilized and observed in a ZMW. The work in this dissertation represents the first single-molecule spectroelectrochemistry investigations in an E-ZMW nanophotonic structure. Means of improving the performance of the FCS optical system and expanding its capabilities are explored. Experimental modifications, device design variations, and other possible redox-active chemical systems are discussed. Advisors/Committee Members: Paul Bohn, Research Director.

Subjects/Keywords: Flavin mononucleotide; Single-molecule; Fluorescence correlation spectroscopy; Zero-mode waveguides; Confinement; Nanopores; Spectroelectrochemistry

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APA (6^th Edition):

Grismer, D. A. (2015). Single-Molecule Spectroelectrochemical Investigation of Freely Diffusing Redox-Active Fluorophores in Zero-Mode Waveguides</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/8s45q813n68

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):

Grismer, Dane A.. “Single-Molecule Spectroelectrochemical Investigation of Freely Diffusing Redox-Active Fluorophores in Zero-Mode Waveguides</h1>.” 2015. Thesis, University of Notre Dame. Accessed April 14, 2021. https://curate.nd.edu/show/8s45q813n68.

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

MLA Handbook (7^th Edition):

Grismer, Dane A.. “Single-Molecule Spectroelectrochemical Investigation of Freely Diffusing Redox-Active Fluorophores in Zero-Mode Waveguides</h1>.” 2015. Web. 14 Apr 2021.

Vancouver:

Grismer DA. Single-Molecule Spectroelectrochemical Investigation of Freely Diffusing Redox-Active Fluorophores in Zero-Mode Waveguides</h1>. [Internet] [Thesis]. University of Notre Dame; 2015. [cited 2021 Apr 14]. Available from: https://curate.nd.edu/show/8s45q813n68.

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

Council of Science Editors:

Grismer DA. Single-Molecule Spectroelectrochemical Investigation of Freely Diffusing Redox-Active Fluorophores in Zero-Mode Waveguides</h1>. [Thesis]. University of Notre Dame; 2015. Available from: https://curate.nd.edu/show/8s45q813n68

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

Michigan Technological University

24. Teimourpour, Mohammad Hosain. QUANTUM INSPIRED SYMMETRIES IN LASER ENGINEERING.

Degree: PhD, Department of Physics, 2017, Michigan Technological University

URL: https://digitalcommons.mtu.edu/etdr/557

► In this thesis, quantum inspired symmetries including Parity-Time (PT) symmetry and Supersymmetry (SUSY) have been studied in the context of non-Hermitian engineered laser systems.… (more)

▼ In this thesis, quantum inspired symmetries including Parity-Time (PT) symmetry and Supersymmetry (SUSY) have been studied in the context of non-Hermitian engineered laser systems. This thesis starts with a short review of semiconductor lasers theory in second chapter, followed by an introduction to quantum inspired symmetries: PT symmetry and SUSY in optics and photonics in chapter three. In chapter four, we have studied the robustness and mode selectivity in PT symmetric lasers. We investigate two important aspects of PT symmetric photonic molecule lasers, namely the robustness of their single longitudinal mode operation against instabilities triggered by spectral hole burning effects, and the possibility of more versatile mode selectivity. Our results, supported by numerically integrating the nonlinear rate equations and performing linear stability analysis, reveals the following: (1) In principle a second threshold exists after which single mode operation becomes unstable, signaling multimode oscillatory dynamics, (2) For a wide range of design parameters, single mode operation of PT lasers having relatively large free spectral range (FSR) can be robust even at higher gain values, (3) PT symmetric photonic molecule lasers are more robust than their counterpart structures made of single microresonators; and (4) Extending the concept of single longitudinal mode operation based on PT symmetry in millimeter long edge emitting lasers having smaller FSR can be challenging due to instabilities induced by nonlinear modal interactions. Finally, we also present a possible strategy based on loss engineering to achieve more control over the mode selectivity by suppressing the mode that has the highest gain (i.e. lies under the peak of the gain spectrum curve) and switch the lasing action to another mode. In chapter five a new scheme for building two dimensional laser arrays that operate in the single supermode regime is proposed. This is done by introducing an optical coupling between the laser array and a lossy pseudo-isospectral chain of photonic resonators. The spectrum of this discrete reservoir is tailored to suppress all the supermodes of the main array except the fundamental one. This spectral engineering is facilitated by employing the Householder transformation in conjunction with discrete supersymmetry. The proposed scheme is general and can in principle be used in different platforms such as VCSEL arrays and photonic crystal laser arrays. Finally, in chapter six we have investigated the laser self-termination (LST) in trimer photonic molecules. It is shown that under the appropriate conditions, LST can exist in complex discrete structures made of three-cavity photonic molecule lasers. We have shown that the phenomenon of LST is a purely linear effect associated with avoided level crossings. Furthermore, our simulations show that the predicted behavior is persistent when gain saturation nonlinearity is taken into account. Conclusion remarks and future works are discussed in the last… Advisors/Committee Members: Ramy El-Ganainy.

Subjects/Keywords: Photonics; non-Hermitian Photonics; PT symmetry; Supersymmetry; Semiconductor lasers; Single mode lasers; Optics

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APA (6^th Edition):

Teimourpour, M. H. (2017). QUANTUM INSPIRED SYMMETRIES IN LASER ENGINEERING. (Doctoral Dissertation). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etdr/557

Chicago Manual of Style (16^th Edition):

Teimourpour, Mohammad Hosain. “QUANTUM INSPIRED SYMMETRIES IN LASER ENGINEERING.” 2017. Doctoral Dissertation, Michigan Technological University. Accessed April 14, 2021. https://digitalcommons.mtu.edu/etdr/557.

MLA Handbook (7^th Edition):

Teimourpour, Mohammad Hosain. “QUANTUM INSPIRED SYMMETRIES IN LASER ENGINEERING.” 2017. Web. 14 Apr 2021.

Vancouver:

Teimourpour MH. QUANTUM INSPIRED SYMMETRIES IN LASER ENGINEERING. [Internet] [Doctoral dissertation]. Michigan Technological University; 2017. [cited 2021 Apr 14]. Available from: https://digitalcommons.mtu.edu/etdr/557.

Council of Science Editors:

Teimourpour MH. QUANTUM INSPIRED SYMMETRIES IN LASER ENGINEERING. [Doctoral Dissertation]. Michigan Technological University; 2017. Available from: https://digitalcommons.mtu.edu/etdr/557

University of Arizona

25. Fang, Qiang. 2 μm Pulsed Fiber Laser Sources and Their Application in Terahertz Generation .

Degree: 2012, University of Arizona

URL: http://hdl.handle.net/10150/232475

► In this dissertation, an all-fiber-based single frequency nanosecond pulsed laser system at ~ 1918.4 nm in master-oscillator-power-amplifier (MOPA) configuration is present. The nanosecond pulse seed… (more)

▼ In this dissertation, an all-fiber-based single frequency nanosecond pulsed laser system at ~ 1918.4 nm in master-oscillator-power-amplifier (MOPA) configuration is present. The nanosecond pulse seed is achieved by directly modulating a continuous wave (CW) single frequency fiber laser using a fast electro-optical modulator (EOM) driven by an arbitrary waveform generator (AWG). One piece of single mode, large core, polarization-maintaining (PM) highly thulium-doped (Tm-doped) germanate glass fiber (LC-TGF) is used to boost the pulse power and pulse energy of these modulated pulses in the final power amplifier. This laser system can work in both high power and high energy regime: in high power regime, to the best of our knowledge, the highest average power 16 W and peak power 78.1 kW are achieved for single frequency transform-limited ~2.0 ns pulses at 500 kHz and 100 kHz repetition rate, respectively: In high energy regime, nearly 1 mJ and half mJ pulse energy is obtained for ~15 ns pulses at 1 kHz repetition rate and 5 kHz repetition rate, respectively. Theoretical modeling of the large-core highly Tm-doped germanate glass double-cladding fiber amplifier (LC-TG-DC-FA) is also present for 2&mum nanosecond pulse amplification. A good agreement between the theoretical and experimental results is achieved. The model can simulate the evolution of pump power, signal energy, pulse shape and the amplified stimulated emission (ASE) in the amplifier. It can also be utilized to investigate the dependence of the stored energy in the LC-TGF on the pump power, seed energy and repetition rate, which can be used to design and optimize the LC-TG-DC-FA to achieve higher pulse energy and average power. Two channel of high energy nanosecond pulses (at 1918.4 nm and 1938 nm) are utilized to generate THz wave in a quasi-phase-matched (QPM) gallium arsenide (GaAs) based on difference frequency generation. THz wave with ~ 5.4μW average power and ~18 mW peak power has been achieved. Besides, one model is built to simulate a singly resonated THz parametric oscillator. The threshold, the dependence of output THz energy on pump energy has been investigated through this model. One pump enhanced THz parametric oscillator has been proposed. The enhancement factor of the nanosecond pulses in a bow-tie ring cavity has been calculated for different pulse duration, cavity length and the transmission of the coupler. And the laser resonances in the ring cavity have been observed by using a piezo to periodically adjust the cavity length. We also build an all-fiber thulium-doped wavelength tunable mode-locked laser operating near 2&mum. Reliable self-starting mode locking over a large tuning range (>50 nm) using fiber taper based carbon nanotube (FTCNT) saturable absorber (SA) is observed. Spectral tuning is achieved by stretching another fiber taper. To the best of our knowledge, this is the first demonstration of an all-fiber wavelength tunable mode-locked laser near 2&mum. Advisors/Committee Members: Peyghambarian, Nasser (advisor), Fallahi, Mahmoud (committeemember), Kieu, Khanh (committeemember), Shi, Wei (committeemember), Peyghambarian, Nasser (committeemember).

Subjects/Keywords: mode-locked; single frequency; thulium; THz generation; Optical Sciences; fiber laser; high power high energy

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APA (6^th Edition):

Fang, Q. (2012). 2 μm Pulsed Fiber Laser Sources and Their Application in Terahertz Generation . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/232475

Chicago Manual of Style (16^th Edition):

Fang, Qiang. “2 μm Pulsed Fiber Laser Sources and Their Application in Terahertz Generation .” 2012. Doctoral Dissertation, University of Arizona. Accessed April 14, 2021. http://hdl.handle.net/10150/232475.

MLA Handbook (7^th Edition):

Fang, Qiang. “2 μm Pulsed Fiber Laser Sources and Their Application in Terahertz Generation .” 2012. Web. 14 Apr 2021.

Vancouver:

Fang Q. 2 μm Pulsed Fiber Laser Sources and Their Application in Terahertz Generation . [Internet] [Doctoral dissertation]. University of Arizona; 2012. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10150/232475.

Council of Science Editors:

Fang Q. 2 μm Pulsed Fiber Laser Sources and Their Application in Terahertz Generation . [Doctoral Dissertation]. University of Arizona; 2012. Available from: http://hdl.handle.net/10150/232475

The Ohio State University

26. Alqahtani, Ayedh H A S. Modeling and Control of Photovoltaic Systems for Microgrids.

Degree: PhD, Electrical and Computer Engineering, 2013, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1381786869

► The aim of this dissertation is to conduct performance analysis for the modeling and control practices of photovoltaic (PV) systems. Different modeling techniques of PV… (more)

▼ The aim of this dissertation is to conduct performance analysis for the modeling and control practices of photovoltaic (PV) systems. Different modeling techniques of PV systems are considered. The current existing modeling techniques are examined with further study, and the desired operating characteristics are achieved through the proposal of a simplified and accurate modeling process that estimates the PV model parameters for a PV module. This is done by taking a new approach that replaces the typical modeling practice in the literature. The main objective of this new approach is to avoid the need for complex calculation and tedious combination of equations to extract the PV system model parameters. The PV system behavior is studied under different environmental conditions. In addition, most PV system models in the literature have internal parameters that are not provided by the manufacturers. These parameters are not given in the PV module data sheet and require numerical methods for their determination due to the nonlinear nature of the PV system’s output characteristics. This research presents an improved and comprehensive PV system characterization method that relies only on the values provided by the manufacturer. New improvements and modifications to some of the existing PV models are also presented. A control design strategy for control of the power generated by PV systems is suggested to provide effective energy extraction. The controller design ensures tracking of the maximum power point (MPP) for the PV system using a sliding mode control method of self-optimization. It offers fast and accurate convergence to the MPP in steady state and during varying weather conditions. Published research results and discussion are provided. The simulation in this research proposal is carried out using a Matlab/Simulink environment. Experimental verification of the simulated results are included to demonstrate the validity of the proposed controller design. Advisors/Committee Members: Utkin, Vadim (Advisor).

Subjects/Keywords: Electrical Engineering; Single diode model, photovoltaic modeling and control, standard test condition, sliding mode control

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

APA (6^th Edition):

Alqahtani, A. H. A. S. (2013). Modeling and Control of Photovoltaic Systems for Microgrids. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1381786869

Chicago Manual of Style (16^th Edition):

Alqahtani, Ayedh H A S. “Modeling and Control of Photovoltaic Systems for Microgrids.” 2013. Doctoral Dissertation, The Ohio State University. Accessed April 14, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1381786869.

MLA Handbook (7^th Edition):

Alqahtani, Ayedh H A S. “Modeling and Control of Photovoltaic Systems for Microgrids.” 2013. Web. 14 Apr 2021.

Vancouver:

Alqahtani AHAS. Modeling and Control of Photovoltaic Systems for Microgrids. [Internet] [Doctoral dissertation]. The Ohio State University; 2013. [cited 2021 Apr 14]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1381786869.

Council of Science Editors:

Alqahtani AHAS. Modeling and Control of Photovoltaic Systems for Microgrids. [Doctoral Dissertation]. The Ohio State University; 2013. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1381786869

University of South Africa

27. Simango, Benson. Leadership styles employed at Zambia's colleges of education .

Degree: 2016, University of South Africa

URL: http://hdl.handle.net/10500/21145

► This study is a collective case study grounded in the literature regarding leadership styles and leadership theories. It includes among others, an analysis of data… (more)

▼ This study is a collective case study grounded in the literature regarding leadership styles and leadership theories. It includes among others, an analysis of data from interviews of college Principals and middle Managers to identify the leadership styles at the three colleges of education. The purpose of the study was to analyse the leadership styles of college Principals and middle Managers operating in dual-mode environments. The colleges that were being studied are the Copperbelt College of Education; Mufulira College of Education and Malcom Moffat College of Education. There were sixteen (16) participants in this study drawn from three colleges. The researcher collected data using semi-structured individual and focused group interviews. In addition, policy documents such as ‗Open and Distance Learning Policy (draft) and National Policy on Education were analysed. The researcher employed qualitative methods in the collection and analysis of data. Triangulation was used in order to verify the information given during this study. The evidence from the literature review indicates that there is no single leadership style that may provide answers to all situations in institutions of higher education; rather, a blend of the leadership styles would be beneficial to college Principals. The research further revealed that, managing dual-mode colleges of education entails that Principals require tailor-made programmes in management and leadership of dual-mode institutions for them to improve quality of their products and enhance tenets of transparency, democracy and good governance in colleges of education in Zambia. They also must be excellent communicators and ensure understanding by students, employees, peers, and the many stakeholders involved in dual-mode colleges of education. The study was important as it hoped to shed some light on how to improve quality of leadership in dual-mode colleges of education in Zambia. The study will contribute scientific knowledge to all categories of Higher Education (HE) institutions especially colleges of education, be they face-to-face or distance mode, that are contemplating a move into dual-mode delivery. Finally, Information garnered from this study is expected to allow Principals and other middle Managers and administrators to evaluate their leadership styles in comparison to the effective styles revealed by this study. Advisors/Committee Members: Nyoni, Jabulani (advisor).

Subjects/Keywords: Conventional institution; Policy harmonisation; Leadership theories; Dual mode institution; Grant-aided institution; Open and distance learning; Transactional leadership; Situational leadership; Transformational leadership; Democratic leadership; Leadership style; Mixed mode; Single mode

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

APA (6^th Edition):

Simango, B. (2016). Leadership styles employed at Zambia's colleges of education . (Doctoral Dissertation). University of South Africa. Retrieved from http://hdl.handle.net/10500/21145

Chicago Manual of Style (16^th Edition):

Simango, Benson. “Leadership styles employed at Zambia's colleges of education .” 2016. Doctoral Dissertation, University of South Africa. Accessed April 14, 2021. http://hdl.handle.net/10500/21145.

MLA Handbook (7^th Edition):

Simango, Benson. “Leadership styles employed at Zambia's colleges of education .” 2016. Web. 14 Apr 2021.

Vancouver:

Simango B. Leadership styles employed at Zambia's colleges of education . [Internet] [Doctoral dissertation]. University of South Africa; 2016. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10500/21145.

Council of Science Editors:

Simango B. Leadership styles employed at Zambia's colleges of education . [Doctoral Dissertation]. University of South Africa; 2016. Available from: http://hdl.handle.net/10500/21145

28. Panglosse, Aymeric. Modélisation pour la simulation et la prédiction des performances des photodiodes à avalanche en mode Geiger pour Lidars spatiaux : Modelling for simulation and prediction of Geiger-mode avalanche photodiode performances for space Lidars.

Degree: Docteur es, Micro et nanosystèmes, 2019, Toulouse, ISAE

URL: http://www.theses.fr/2019ESAE0046

►

Ce travail porte sur la modélisation pour la simulation et la prédiction desparamètres de performance des photodiodes à avalanche polarisée en mode Geiger en technologieCMOS,… (more)

▼

Ce travail porte sur la modélisation pour la simulation et la prédiction desparamètres de performance des photodiodes à avalanche polarisée en mode Geiger en technologieCMOS, ou SPADs CMOS, pour Lidars spatiaux. Ce travail de thèse vise à développerune méthodologie basée sur : des modèles de la physique du semi-conducteur, des mesuresfournissant des informations sur le procédé technologique visé et des outils commerciaux desimulation. Ceci, dans le but de simuler les paramètres de performance des SPADs en serapprochant autant que possible de la réalité du procédé technologique afin d’améliorer lesprédictions. Des SPADs ont été conçues et caractérisées de manière à acquérir les paramètresde performances et les confronter aux résultats de simulation pour valider notre approche.De plus, la conception des SPADs s’est faite en regard des spécifications Lidar du CNESet d’Airbus Defence and Space en vue d’obtenir des structures permettant d’améliorer nosconnaissances en matière de : compréhension des mécanismes physiques, conception et méthodede caractérisation des SPADs CMOS. Ceci, dans l’intention d’étudier la possibilitéd’intégrer ces détecteurs dans leurs futurs systèmes Lidars spatiaux.

This work focuses on modelling for simulation and prediction purposes ofCMOS SPADs performance parameters used in spaceborne Lidars. The innovative side ofthis work lies in a new methodology based on physical models for semiconductor devices,measurements performed on the targeted CMOS process and commercial simulation tools topredict CMOS SPADs performances. This method allows to get as close as possible to theprocess reality and to improve predictions. A set of SPAD has been designed and fabricated,and is used for measurements and model validation. SPAD design has been done with respectto CNES and Airbus Defence Space Lidar specification, in order to produce devices that willimprove our knowledge in terms of understanding of the involved physical mechanisms, SPADsdesign and test method, for a possible integration within their future spaceborne Lidars.

Advisors/Committee Members: Magnan, Pierre (thesis director), Martin-Gonthier, Philippe (thesis director).

Subjects/Keywords: Lidars spatiaux; Photodiode à avalanche à photon unique; Mode Geiger; SPADs CMOS; Modélisation et simulation; Spaceborne Lidars; Single photon avalanche diode; Geiger mode; CMOS SPADs; Modelling and simulation

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

APA (6^th Edition):

Panglosse, A. (2019). Modélisation pour la simulation et la prédiction des performances des photodiodes à avalanche en mode Geiger pour Lidars spatiaux : Modelling for simulation and prediction of Geiger-mode avalanche photodiode performances for space Lidars. (Doctoral Dissertation). Toulouse, ISAE. Retrieved from http://www.theses.fr/2019ESAE0046

Chicago Manual of Style (16^th Edition):

Panglosse, Aymeric. “Modélisation pour la simulation et la prédiction des performances des photodiodes à avalanche en mode Geiger pour Lidars spatiaux : Modelling for simulation and prediction of Geiger-mode avalanche photodiode performances for space Lidars.” 2019. Doctoral Dissertation, Toulouse, ISAE. Accessed April 14, 2021. http://www.theses.fr/2019ESAE0046.

MLA Handbook (7^th Edition):

Panglosse, Aymeric. “Modélisation pour la simulation et la prédiction des performances des photodiodes à avalanche en mode Geiger pour Lidars spatiaux : Modelling for simulation and prediction of Geiger-mode avalanche photodiode performances for space Lidars.” 2019. Web. 14 Apr 2021.

Vancouver:

Panglosse A. Modélisation pour la simulation et la prédiction des performances des photodiodes à avalanche en mode Geiger pour Lidars spatiaux : Modelling for simulation and prediction of Geiger-mode avalanche photodiode performances for space Lidars. [Internet] [Doctoral dissertation]. Toulouse, ISAE; 2019. [cited 2021 Apr 14]. Available from: http://www.theses.fr/2019ESAE0046.

Council of Science Editors:

Panglosse A. Modélisation pour la simulation et la prédiction des performances des photodiodes à avalanche en mode Geiger pour Lidars spatiaux : Modelling for simulation and prediction of Geiger-mode avalanche photodiode performances for space Lidars. [Doctoral Dissertation]. Toulouse, ISAE; 2019. Available from: http://www.theses.fr/2019ESAE0046

Penn State University

29. Karun, Ronald James. DESIGN AND TESTING OF A SINGLE-CRYSTAL, LOW-FREQUENCY, DUAL-RESONANT SHEAR-MODE TRANSDUCER FOR SONAR APPLICATIONS.

Degree: 2018, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/15904rjk5257

► Recent crystallographic engineering has uncovered enhanced piezoelectric properties that are resident in “relaxor” ferroelectric crystals. With the proper crystallographic cut, the ternary relaxor single crystal,… (more)

▼ Recent crystallographic engineering has uncovered enhanced piezoelectric properties that are resident in “relaxor” ferroelectric crystals. With the proper crystallographic cut, the ternary relaxor single crystal, Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3, or PIN-PMN-PT, exhibits piezoelectric strain and compliance coefficients that are approximately four times greater than conventional piezoelectric ceramics. The longitudinal and shear piezoelectric properties and responses in these crystals are then modified through a process called coordinate rotation. Coordinate rotation takes advantage of domain orientations that form within the material during crystal growth. A PIN-PMN-PT crystal with a zxt±45̊ cut takes advantage of this process and produces a d36 shear mode of operation. This cut produces a d36 piezoelectric strain coefficient of –236.8 x 10-11 m/V, which outperforms conventional piezoelectric ceramics that routinely exhibit piezoelectric strain coefficients near 59.3 x 10-11 m/V. Additionally, the PIN-PMN-PT zxt±45̊ crystal cut results in a SE66 compliance coefficient of 17.970 x 10-11 m2/N as compared to the conventional piezoelectric ceramic PZT-5 with a SE66 compliance coefficient of 4.256 x 10-11 m2/N. The increased compliance coefficient leads to a softer material with a higher coupling factor. The higher coefficients and coupling factors allow for a more efficient transfer of energy between the electrical and mechanical domains. Eight PIN-PMN-PT single crystals (four with a zxt+45̊ crystal cut and four with a zxt-45̊ crystal cut) were recently integrated into a SONAR transducer design that combines low frequency operation with small packaging and high acoustic output. Contrary to more common shear coefficients, the d36 mode of vibration operates with working electrodes that are the same as the poling electrodes. The major advantage of using the PIN-PMN-PT single crystals in the d36 shear mode of operation is that the applied electric field is in the poling direction, which allows for a much higher AC drive field and results in a significantly higher mechanical quality factor. These parameters lend themselves well to compact, low frequency, high power devices and are not available in conventional piezoelectric ceramics. This study explores this new mode of operation using a tonpilz transducer design and focuses on the ability to design multiple resonances into the structure to tailor the performance of the device. The separation in frequency between multiple resonances can be increased or decreased to tailor the transducer for specific functions. The resonances can be modified to lower the frequency of operation or improve the acoustic output. When separated, the resonances serve to extend the operating bandwidth of the device. The primary technical objective is to incorporate single crystal relaxor-ferroelectrics into a broadband, compact, high power, low frequency transducer. The tonpilz shear mode transducer using d36 crystals is a projector that meets these qualifications. During… Advisors/Committee Members: Robert M. Keolian, Dissertation Advisor/Co-Advisor, Thomas B. Gabrielson, Committee Chair/Co-Chair, Stephen C. Thompson, Committee Member, Robert M. Keolian, Committee Member, Jose Palacios, Outside Member.

Subjects/Keywords: tonpilz transducer; PIN-PMN-PT; d36 shear mode transducer; zxt±45̊ crystal cut; ternary relaxor single crystal

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APA (6^th Edition):

Karun, R. J. (2018). DESIGN AND TESTING OF A SINGLE-CRYSTAL, LOW-FREQUENCY, DUAL-RESONANT SHEAR-MODE TRANSDUCER FOR SONAR APPLICATIONS. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/15904rjk5257

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):

Karun, Ronald James. “DESIGN AND TESTING OF A SINGLE-CRYSTAL, LOW-FREQUENCY, DUAL-RESONANT SHEAR-MODE TRANSDUCER FOR SONAR APPLICATIONS.” 2018. Thesis, Penn State University. Accessed April 14, 2021. https://submit-etda.libraries.psu.edu/catalog/15904rjk5257.

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

MLA Handbook (7^th Edition):

Karun, Ronald James. “DESIGN AND TESTING OF A SINGLE-CRYSTAL, LOW-FREQUENCY, DUAL-RESONANT SHEAR-MODE TRANSDUCER FOR SONAR APPLICATIONS.” 2018. Web. 14 Apr 2021.

Vancouver:

Karun RJ. DESIGN AND TESTING OF A SINGLE-CRYSTAL, LOW-FREQUENCY, DUAL-RESONANT SHEAR-MODE TRANSDUCER FOR SONAR APPLICATIONS. [Internet] [Thesis]. Penn State University; 2018. [cited 2021 Apr 14]. Available from: https://submit-etda.libraries.psu.edu/catalog/15904rjk5257.

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

Council of Science Editors:

Karun RJ. DESIGN AND TESTING OF A SINGLE-CRYSTAL, LOW-FREQUENCY, DUAL-RESONANT SHEAR-MODE TRANSDUCER FOR SONAR APPLICATIONS. [Thesis]. Penn State University; 2018. Available from: https://submit-etda.libraries.psu.edu/catalog/15904rjk5257

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

NSYSU

30. Lin, Shi-Yuan. Highly Sensitive Open-cavity FabryâPÃ©rot Interferometer sensors by Integrating Hollow-core Fiber and Double-beveled Single-mode Fiber.

Degree: Master, Electro-Optical Engineering, 2018, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0721118-122642

► Fiber-optic Fabry-PÃ©rot interferometers (FPIs) have been widely applied in many fields due to their superior properties such as compact size, high sensitivity, and immunity to… (more)

Subjects/Keywords: Fiber-optic Fabry-pÃ©rot interferometers; Polished machining; Fiber sensor; Double-beveled single-mode fiber; Open cavity

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

APA (6^th Edition):

Lin, S. (2018). Highly Sensitive Open-cavity FabryâPÃ©rot Interferometer sensors by Integrating Hollow-core Fiber and Double-beveled Single-mode Fiber. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0721118-122642

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):

Lin, Shi-Yuan. “Highly Sensitive Open-cavity FabryâPÃ©rot Interferometer sensors by Integrating Hollow-core Fiber and Double-beveled Single-mode Fiber.” 2018. Thesis, NSYSU. Accessed April 14, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0721118-122642.

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

MLA Handbook (7^th Edition):

Lin, Shi-Yuan. “Highly Sensitive Open-cavity FabryâPÃ©rot Interferometer sensors by Integrating Hollow-core Fiber and Double-beveled Single-mode Fiber.” 2018. Web. 14 Apr 2021.

Vancouver:

Lin S. Highly Sensitive Open-cavity FabryâPÃ©rot Interferometer sensors by Integrating Hollow-core Fiber and Double-beveled Single-mode Fiber. [Internet] [Thesis]. NSYSU; 2018. [cited 2021 Apr 14]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0721118-122642.

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

Council of Science Editors:

Lin S. Highly Sensitive Open-cavity FabryâPÃ©rot Interferometer sensors by Integrating Hollow-core Fiber and Double-beveled Single-mode Fiber. [Thesis]. NSYSU; 2018. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0721118-122642

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

Open Access Theses and Dissertations