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Dissertations / Theses on the topic 'Division of photons'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Kharbache, Hayat. "Propriétés de fluorescence de l'ion Eu3+ dans K2(Y, Gd)F5 : analyse des couplages Eu3+-Eu3+ et des mécanismes de division de photons." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2008. http://tel.archives-ouvertes.fr/tel-00728845.

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La spectroscopie de fluorescence induite par laser et par rayonnement synchrotron a été utilisée pour analyser l'intense émission de l'ion Eu3+ dans les fluorures K2YF5 et K2GdF5. L'utilisation conjuguée de la spectroscopie résolue dans le temps, de la variation de la concentration en ions Eu3+ a permis d'identifier les niveaux électroniques de l'ion Eu3+ après excitation dans les niveaux 5D2, 5D1 et 5D0. Les répartitions spectrales de la fluorescence se corrèlent parfaitement avec un ion Eu3+ inséré dans un site de symétrie C1 . A basse température, en dessous de 100 K, des structures satelli

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Furtado, Neto Job Saraiva. "Ação de Euler-Heisenberg no contexto de violação de simetria de Lorentz." Universidade Federal de Alagoas, 2013. http://www.repositorio.ufal.br/handle/riufal/1491.

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The effective action of Euler Heisenberg describes the nonlinear dynamics of electromagnetic fields in vacuum. Such action takes into account the polarization in a vacuum for a bond, in addition to describing also the photon propagation through arbitrary electromagnetic fields that vary slowly. So, since its discovery, the effective action of Euler Heisenberg has been studied in various contexts, such as the scattering of light by light, pair production in a vacuum, Division of photons, birefringence in vacuum, effective action in gravity and string theory, among others. In this work we perfor

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Cowin, Michael. "Integrated polymeric components for wavelength division multiplexing." Thesis, University of Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364964.

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4

Bai, Neng. "Mode-Division Multiplexed Transmission in Few-mode Fibers." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5761.

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As a promising candidate to break the single-mode fiber capacity limit, mode-division multiplexing (MDM) explores the spatial dimension to increase transmission capacity in fiber-optic communication. Two linear impairments, namely loss and multimode interference, present fundamental challenges to implementing MDM. In this dissertation, techniques to resolve these two issues are presented. To de-multiplex signals subject to multimode interference in MDM, Multiple-Input-Multiple-Output (MIMO) processing using adaptive frequency-domain equalization (FDE) is proposed and investigated. Both simula

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Wei, Shi. "Silicon photonic filters for wavelength-division multiplexing and sensing applications." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43116.

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This thesis is a theoretical and experimental study of novel silicon photonic filters, such as traveling-wave resonators (TWRs) and grating-assisted, contra-directional couplers (contra-DCs), for on-chip wavelength-division-multiplexing (WDM) systems and sensing applications. To measure optical losses of photonic components such as Y-branch splitters and waveguide crossings, we have developed a ring-resonator based technique which is accurate, simple, and space-efficient. A number of novel devices have been demonstrated using commercial CMOS-photonics fabrication foundries, with the aim of d

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Boeck, Robert. "High performance silicon photonic filters for dense wavelength-division multiplexing applications." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57688.

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This dissertation presents theoretical and experimental results for silicon optical ring resonator filters that meet many of the typical commercial specifications for dense wavelength-division multiplexing (DWDM) filters. First, we theoretically demonstrate a silicon quadruple Vernier racetrack resonator that meets 4-port filter commercial specifications for a clear window of 0.08 nm and a channel spacing of 0.8 nm while being tolerant to typical fabrication variations. Next, we experimentally demonstrate a silicon quadruple Vernier racetrack resonator that meets many 3-port filter commercial

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7

SHEN, HUI. "DESIGN AND SIMULATION OF A WAVELENGTH DIVISION MULTIPLEXER DEMULTIPLEXER BASED ON PHOTONIC CRYSTAL FILTERS." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1127413901.

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Griffin, Robert A. "Coherent optical matched filtering for application in photonic code-division multiple access communication networks." Thesis, University of Kent, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240135.

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9

Pérez, Galacho Diego. "High speed optical modulation, advanced modulation formats and mode division multiplexing in Silicon photonics." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS194/document.

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La demande en bande passante des systèmes de communication optique ne cesse de croitre. Des débits de données de l’ordre de plusieurs centaines de TBit/s sont attendus dans un futur proche. La photonique silicium est une technologie majeure pour faire face à ces besoins croissants. Sa compatibilité avec les technologies CMOS permet naturellement une co-intégration photonique/électronique sur les mêmes circuits. A court terme, l’augmentation des débits de données dans les générations futures de système de communication optique passe par l’utilisation de formats de modulation avancés, et l’augme

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Akdemir, Kahraman Daglar. "Wavelength conversion using reconfigurable photonic crystal MEMS/NEMS structures." Worcester, Mass. : Worcester Polytechnic Institute, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-011007-113547/.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: FDTD; Linear interpolation; MEMS; NEMS; Photonic crystals; Wavelength conversion; Frequency conversion; Doppler. Includes bibliographical references (leaves 107-114).

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Cao, Siwei. "THE FABRICATION OF A PHOTONIC CRYSTAL BASED THREE CHANNEL WAVELENGTH DIVISON DEMULTIPLEXER (WDDM) DEVICE." Miami University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=miami1219330454.

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Kuo, Ping-piu, and 郭炳彪. "Fiber-based nonlinear photonic processor: a versatile platform for optical communication signal processing." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B4098817X.

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Kuo, Ping-piu. "Fiber-based nonlinear photonic processor a versatile platform for optical communication signal processing /." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B4098817X.

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14

Youssef, Ahmed H. "ASSESSMENT OF PHOTONIC SWITCHES AS FUTURE REPLACEMENT FOR ELECTRONIC CROSS-CONNECT SWITCHES." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/608526.

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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>This paper presents the future of optical networking via photonic switches as a potential replacement for the existing electronic cross-connects. Although optical amplifiers are now mainstream and wave division multiplexing (WDM) systems are a commercial reality, the industry’s long-term vision is one of the all-optical network. This will require optical switching equipment such as all-optical or “photonic” cross-connect switches that will provide packet switching

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Abouzahra, Mohamed D., Frank C. Robey, and Scott Henion. "PHOTONIC REMOTING OF THE KWAJALEIN MISSILE RANGE POST IMPACT TELEMETRY SYSTEM." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/607308.

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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>This paper describes the design, configuration, testing, and performance of a Fiber Optic Link used to transmit the signals from a remotely located S-band telemetry system to the main facility at the Kwajalein Missile Range (KMR). This fiber optic system demonstrates for the first time the feasibility of linking RF data from multiple antennas via a single fiber and over a nearly 100-km distance. Measured data of key link parameters such as gain, bit-error-rat

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Boros, Vince Elias. "On a photonic bus architecture that incorporates wavelength multiplexing and reuse for reconfigurable computers /." St. Lucia, Qld, 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18043.pdf.

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Zhang, Yunlong [Verfasser], and M. [Akademischer Betreuer] Weber. "Building blocks of a silicon photonic integrated wavelength division multiplexing transmitter for detector instrumentation = Bausteine für einen integrierten siliziumphotonischen Wellenlängenmultiplexsender zur Detektorinstrumentierung / Yunlong Zhang ; Betreuer: M. Weber." Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/1227451229/34.

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Song, Jun. "Electromagnetic simulation and design of etched diffraction grating demultiplexers." Doctoral thesis, KTH, Elektroteknisk teori och konstruktion, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4791.

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Among various planar lightwave circuits for multiplexing/demultiplexing in an optical communication system, etched diffraction gratings (EDGs) have shown great potential due to their compactness and high spectral finesse. Conventional numerical methods for grating simulation cannot be used to simulate an EDG demultiplexer of large size (in terms of the wavelength). In the present thesis, the polarization-dependent characteristics of an EDG demultiplexer are analyzed with a boundary element method (BEM) for both an echelle grating coated with a metal and a dielectric grating with total internal

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19

Fernández, Vicente Juan. "Reconfigurable Reflective Arrayed Waveguide Grating on Silicon Nitride." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/165783.

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[ES] La presente tesis se ha centrado en el modelado, diseño y demonstración experimental por primera vez del dispositivo Reconfigurable Reflective Arrayed Waveguide Grating (R-RAWG). Para la consecución de este dispositivo que tiene posibilidades de uso en la espectrometría, una plataforma de nitruro de silicio llamada CNM-VLC se ha usado, ya que este material permite operar en un gran ancho de banda. Esta plataforma posee ciertas limitaciones y los elementos necesarios para el funcionamiento de este dispositivo tenían un performance bajo. Por ello, se ha desarrollado y validado una metodolog

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Hussein, Ali Abdulsattar. "Photonic Integrated Circuits Utilizing Nano-Electromechanical Systems on Silicon-on-Insulator Platform for Software Defined Networking in Elastic Optical Networks: New Insights Into Phased Array Systems, Tunable WDM, and Cascaded FIR and IIR Architectures." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39592.

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Optical communications systems operate at the limits of their margins to respond to increasing capacity demands. Some of the signal processing functions required must soon operate at speeds beyond electronic implementation. Optical signal processors are fundamentally analog which requires precise control of the operating state. Programmable optical components are consequently essential. The thesis explores and elucidates the properties of meshes of generalized Mach-Zehnder interferometers (GMZIs) amenable to silicon (Si) photonics integration that are based on multimode interference couplers w

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Hussein, Ali Abdulsattar. "Design of Photonic Phased Array Switches Using Nano Electromechanical Systems on Silicon-on-insulator Integration Platform." Thesis, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/30356.

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This thesis presents an introduction to the design and simulation of a novel class of integrated photonic phased array switch elements. The main objective is to use nano-electromechanical (NEMS) based phase shifters of cascaded under-etched slot nanowires that are compact in size and require a small amount of power to operate them. The structure of the switch elements is organized such that it brings the phase shifting elements to the exterior sides of the photonic circuits. The transition slot couplers, used to interconnect the phase shifters, are designed to enable biasing one of the silicon

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Abou-Galala, Feras Moustafa. "True-time all optical performance monitoring by means of optical correlation." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1180549555.

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Michit, Nicolas. "Switch optique pour la conception de liens WDM rapides en photonique sur silicium." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI033.

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La photonique sur silicium est une solution de remplacement de l’électronique pour les communications demandant des débits extrêmement élevés, intégré avec une haute densité au sein des serveurs, des cartes voire des puces. Pour atteindre de hauts débits (400G, 800G et au-delà), il est intéressant de multiplexer l’information et désagréger les ressources. Cela amène la nécessité de penser des switches capables de gérer de hauts débits et un grand nombre de ports. Dans un premier temps, le choix d’utiliser des liens à base d’anneaux a été justifié notamment en termes de compacité, de flexibilit

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Seefeldt, Connor. "'Factum ex scientia': I Canadian Corps Intelligence during the Liri Valley Campaign, May – June 1944." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23327.

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Studies on Canadian Army military intelligence remain sparse in Canadian military historiography. This study is unique in that it focuses on the development, doctrine, and influence of intelligence within the I Canadian Corps throughout the Liri Valley battles during the Italian Campaign. It will be argued that I Canadian Corps intelligence achieved notable overall success in helping to break the Hitler Line by providing comprehensive and relatively up-to-date information on enemy dispositions and strengths which helped commanders and staff planners properly prepare for the operation. This suc

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Wang, Jyh Yuan, and 王智源. "Design of Photonic Code Division Switch." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/35773235269242202897.

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碩士<br>淡江大學<br>電機工程學系<br>87<br>Technique of CDMA is widely applied in wireless local network or fiber-optic communication system. The wireless local network uses Walsh or Gold as spreading code and the fiber-optic communication system utilities prime code as spreading code. Because this thesis studies the optical switch, so we use prime code to design optical switch. The prime code has the simultaneous codes which can be used to design the photonic code division switch.(PCDS).But the prime code can not support large number of simultaneous users. We propose the quasi synchronization parallel pri

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Ko, Chen-Ken, and 柯振根. "Multiaccess Photonic Systems Using Wavelength Division Multilexing." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/47960829029060139393.

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Dinseh, Kumar V. "Analysis And Simulation Of Photonic Crystal Components For Optical Communications." Thesis, 2004. http://etd.iisc.ernet.in/handle/2005/1197.

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cheng, ying sui, and 鄭穎穗. "Design Photonic Crystal Wavelength Division Multiplexer by Hexagonal Lattice." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/68481590816000179982.

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碩士<br>長庚大學<br>光電工程研究所<br>94<br>Photonic crystal – the semiconductor of the light, today when the semiconductor has already highly integrated, a lot of problems are produced, then The photonic crystal is offering another kind of thinking . The photonic crystals are divided into for the one-dimensional (1D ), two-dimensional (2D ) and three kinds of kinds of linking degree of three-dimensional (3D ), differentiate suitable use or else. With the place. One-dimensional photonic crystals are used on Bragg reflector earliest, two-dimentional photonic crystals are the most achievement is shown in aca

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Guo, Chao-Jie, and 郭朝傑. "Tunable Photonic Crystal Wavelength Division Multiplexer with Liquid Crystal Defects." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/52433621534845304328.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>94<br>Two dimensional photonic crystal slabs have formed photonic band gap that forbids wave propagation. With the defects in photonic crystals, the defect modes will be found at a resonance frequency within the photonic band gap. Photonic crystal waveguides and cavities are the two fundamental devices used to spatially localize the light in a planar photonic crystal. We design a channel filter of a two dimensional photonic crystal with triangular lattices. We present a method for tuning a photonic crystal microcavity by rotating electromagnetically the director

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Jiang, Wei Chen Ray T. "Wavelength-selective micro- and nano-photonic devices for wavelength division multiplexing networks." 2005. http://repositories.lib.utexas.edu/bitstream/handle/2152/1581/jiangw09150.pdf.

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Jiang, Wei. "Wavelength-selective micro- and nano-photonic devices for wavelength division multiplexing networks." Thesis, 2005. http://hdl.handle.net/2152/1581.

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Tsai, Jian-Hong, and 蔡建弘. "Study of Filter-Type Wavelength-Division Multiplexer for Two-Dimensional Photonic Crystals." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/68343862935751911408.

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碩士<br>龍華科技大學<br>電機工程系碩士班<br>103<br>The Wavelength-Division Multiplexers(WDM) are important optical elements in the optical integrated circuits.In this thesis,we present the simulation and analysis of filter-type WDM by adding cavity-resonator filters and continuous-dielectric-rod filters into the line defect waveguides for two-dimensional photonic crystals structure. The proposed filter-type WDM uses a T-junction structure and consists of one input port and two output ports.We design the WDM with a continuous-dielectric-rod filter on the first output port and a cavity-resonator filter on the s

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Hong, Chung-Yu, and 洪崇瑜. "Design and Analysis of Multimode Interference-based Photonic Crystal Wavelength-Division-Demultiplexers." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/27121105010718399572.

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碩士<br>國立交通大學<br>電子工程系所<br>95<br>In this study, the multimode interference (MMI) effect and its principle (self-imaging) in 2-D photonic crystal waveguides (PCWs) are investigated. By using the finite-difference time-domain (FDTD) computation performed on a multimode photonic crystal line-defect waveguide, the self-imaging phenomenon and the imaging positions along the propagation axis are observed, and it is found that the results are in good agreement with those derived from the modal propagation analysis (MPA). This mean that the analytic methods for MMI in conventional multimode waveguides

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Chen, Zong-Yan, and 陳宗延. "The design of all-optical Wavelength Division Multiplexing Devices Based on Photonic Crystals." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/13647974549775582217.

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碩士<br>國立高雄應用科技大學<br>電子工程系<br>99<br>In this thesis, some all optical devices based on 2D PCs with defects are discussed. Photonic crystals (PCs) are nano-structured materials in which a periodic variation of the dielectric constant of the material results in a photonic band gap. Photons with wavelengths or energies in this band gap cannot travel through the crystal. By introducing defects into PCs, it is possible to build waveguides that can channel light along certain paths. It is also possible to construct micro-cavities that can localize photons in extremely small volumes. In this thesis, we

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LIN, YU-MIN, and 林育民. "Study of Ring Resonator Type Wavelength-Division Multiplexer for Two-Dimensional Photonic Crystals." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/91527810206853948102.

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碩士<br>龍華科技大學<br>電機工程系碩士班<br>104<br>In the optical integrated circuits, wavelength-division multiplexers (WDM) optical communication system is an important element. In this paper the use of two-dimensional photonic crystal cubic lattice dielectric column is the main structure. The line defect waveguide resonant cavity filter was added, then a ring resonant cavity is arranged at the side,the two resonant cavities form the design of a ring resonant cavity type WDM;this paper presents a ring resonant cavity type WDM. The proposed structure consists of one input port and two output ports,output por

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Chen, Tsung-Ying, and 陳琮穎. "Design and Simulation of Wavelength Division Demultiplexers Based on Two-Dimensional Photonic Crystal Microcavities." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/35156076157532743168.

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碩士<br>龍華科技大學<br>電機工程系碩士班<br>104<br>Design and simulation of 1x2 wavelength-division demultiplexers based on two-dimensional photonic crystal microcavities in triangular air-hole lattice was conducted in this work. As for numerical techniques, plane-wave expansion method was employed to calculate photonic bandgap and waveguide dispersion curve. Finite-difference time-domain method was used to simulate wave propagation in line-defect waveguides. Firstly, wavelength filters based on microcavity were designed, including single-hole, two-hole, and dissimilar-hole microcavities. Resonant frequency c

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Kuo, Hung-Fu, and 郭洪福. "The Design of Multi-channel Wavelength Division Multiplexing Based on Two-Dimensional Photonic Crystals." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/b7p3tn.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>95<br>The communication system using Wavelength-division multiplexing (WDM) allows for better utilization of the spectral bandwidth. Photonic crystals (PhCs) exhibit photonic bandgap (PBG) due to the periodic variation of the dielectric constant and photons with a range of frequencies within the PBG cannot travel through the crystal. By introducing defects into PhCs, it is possible to control the light propagation along certain paths. In this thesis, the characteristics of coupled cavity waveguides (CCWs) and drop filter are discussed. Then we propose a multi-chan

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Ophir, Noam. "Silicon Photonics for All-Optical Processing and High-Bandwidth-Density Interconnects." Thesis, 2013. https://doi.org/10.7916/D8S75GC6.

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Silicon photonics has emerged in recent years as one of the leading technologies poised to enable penetration of optical communications deeper and more intimately into computing systems than ever before. The integration potential of power efficient WDM links at the first level package or even deeper has been a strong driver for the rapid development this field has seen in recent years. The integration of photonic communication modules with very high bandwidth densities and virtually no bandwidth-distance limitations at the short reach regime of high performance computers and data centers has t

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Lee, Chien-Chung, and 李健仲. "The Applications of Wavelength Division Multiplexing and Brillouin Scattering in Optical Transmission, Photonic Switching and Fiber Sensing." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/01496382493233385435.

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博士<br>國立交通大學<br>光電工程所<br>89<br>In this dissertation, we study two applications of wavelength division multiplexing (WDM) in optical transmission and photonic switching, and one application of Brillouin scattering in fiber sensing. The content about WDM applications includes the investigation of fiber nonlinearity in WDM systems, the utilization of different fiber media and modulation formats to reduce crosstalk due to fiber nonlinearity in WDM networks, the investigation of wavelength allocation in WDM transmission, the study of the self-injection-feedback configuration of fiber Bragg grating

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Hsu, Jui-Hong, and 徐瑞鴻. "The Study of All-Optical Logic Gates and Wavelength Division Multiplexers based on Two-Dimension Photonic Crystal." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/48109388636334546017.

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碩士<br>國立高雄應用科技大學<br>電子與資訊工程研究所碩士班<br>96<br>In this thesis, it discussed the application of wavelength division multiplexers and all-optical logic gates of flip-flop in the photonic crystals. A photonic crystal is a revolutionary class of artificially periodic electromagnetic media, in which a fundamentally new electromagnetic phenomenon can be achieved. A photonic band gap defines a range of frequencies for which light is forbidden to exist inside the crystal. In such beam-splitter, the optical field is confined, horizontally, by a photonic band gap (PBG) provided by the photonic crystal. By u

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Shih-ChiehCheng and 程世傑. "Multichannel wavelength division multiplexing system based on silicon rods of periodic lattice constant of hetero photonic crystal units." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/08799078657429069404.

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涂家斌. "Tight-Binding Theory for Coupling of Identical Photonic Crystal Waveguides and its application for Wavelength-Division Multiplexing design." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/32179890911221797360.

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碩士<br>國立交通大學<br>光電工程系所<br>93<br>By using tight-binding theory of solid-state physics, we can analytically describe the dispersion relation of the propagation in a photonic crystal waveguide (PCW). In turn, we can derive the dispersion curves of two coupled identical PCWs . Due to not only the transverse coupling as the conventional coupled waveguides but also the longitudinal coupling of two coupled identical PCWs. “Band-crossing” may occur at which the PCWs will not couple with each other (or decoupled) when the coupled PCWs are placed close enough to each other. By employing the tight-bi

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"Photonic devices and subsystems for future WDM PON and radio over fiber technologies." Thesis, 2010. http://library.cuhk.edu.hk/record=b6074887.

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Besides colorless ONUs, we investigate potentially low cost, high speed vertical-cavity-surface-emitting lasers (VCSELs) for use in future access networks. VCSELs are attractive because they may meet the stringent size, power dissipation and cost constraints of access network components. We carry out experiments to demonstrate that up to 20 Gb/s direct modulation of long wavelength VCSEL is possible and evaluate their performance as high-speed transceivers.<br>In order to reduce the complexity and costs of ONU transceiver, we propose a scheme based on a nonreciprocal optical modulator and a li

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Tupakula, Sreenivasulu. "Photonic Crystal Ring Resonators for Optical Networking and Sensing Applications." Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2860.

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Photonic bandgap structures have provided promising platform for miniaturization of modern integrated optical devices. In this thesis, a photonic crystal based ring resonator (PCRR) is proposed and optimized to exhibit high quality factor. Also, force sensing application of the optimized PC ring resonator and Dense Wavelength Division Multiplexing (DWDM) application of the PCRR are discussed. Finally fabrication and characterization of the PCRR is presented. A photonic crystal ring resonator is designed in a hexagonal lattice of air holes on a silicon slab. A novel approach is used to optimize

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Heidarialamdarloo, Jamshid. "Advanced communications with plastic optical fibers." Doctoral thesis, 2018. http://hdl.handle.net/10773/25881.

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Nowadays, fiber to the Home/Curb/Building/Cabinet (FTTx) services that interconnect homes with a standard glass optical fiber cables to the core/access optical networks have brought the optical fiber at the doorsteps of our homes. However, the last few miles in home access network is still based on the limited bandwidth electronic component which supports by the cooper wires e.g. Cat-5, 6. The rapid growth of personal smart/mobile electronic devices with new developments such as video on demand, High Definition (HD) and three-Dimension (3D) television (TV), cloud computing, video conferences,

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Oliveira, Beatriz Manata de. "Performance analysis of radio over fiber system employing digital predistortion." Master's thesis, 2017. http://hdl.handle.net/10316/83405.

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Dissertação de Mestrado Integrado em Engenharia Electrotécnica e de Computadores apresentada à Faculdade de Ciências e Tecnologia<br>Actualmente, as comunicações sem fios (wireless) estão a entrar numa nova fase, as redes de 5ª geração (5G), onde se espera o aumento de serviços que necessitam de grande largura de banda, nomeadamente, serviços interactivos e multimédia. Para suportar estas exigências, uma vertente da investigação em comunicações wireless estuda a operação na gama das microondas/ondas milimétricas para assim evitar o congestionamento espectral nas baixas frequências. Esta estrat

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Madhav, Kalaga Venu. "All-Fiber Sensing Techniques For Structural Health Monitoring And Other Applications." Thesis, 2007. http://hdl.handle.net/2005/644.

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In this thesis, we explore the four aspects of fiber Bragg grating sensors: mathematical modeling of Fiber Bragg Grating response/spectral characteristics, fabrication using phase mask, application and interrogation. Applications of fiber Bragg gratings, also known as in-fiber gratings, with emphasis on their sensing capabilities, interrogation of an array of sensors and their performance in structural health monitoring scenario are documented. First, we study the process of photosensitivity phenomenon in glasses, in particular GeO2:SiO2 glasses. For mathematical modeling we consider the 1-D

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Meena, D. "Optical WDM Systems for Multi-point Distribution of Hybrid Signals in Phased Array Radar Applications." Thesis, 2015. http://etd.iisc.ernet.in/2005/3829.

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Photonics and Optical techniques have advanced recently by a great extend to play an important role in Microwave and Radar applications. Antenna array of modern active phased array radars consist of multiple low power transmit and receive mod- ules. This demands distribution of the various Local Oscillator(LO) signals for up conversion of transmit signals and down conversion of receive signals during various modes of operation of a radar system. Additionally, these receivers require control and clock signals which are digital and low frequency analog, for the synchronization between receive mo

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