Wide Band Low Dispersion Low Losses Slow Light In Photonic Crystal Waveguides
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Wide Band Low Dispersion Low Losses Slow Light In Photonic Crystal Waveguides
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Author : Ran Hao
language : en
Publisher:
Release Date : 2010
Wide Band Low Dispersion Low Losses Slow Light In Photonic Crystal Waveguides written by Ran Hao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
This Ph.D study brings contributions of solving present problems for slow light in photonic crystal waveguides, aiming to obtain wide-band, low-dispersion, and low losses slow light. Novel kinds of photonic crystal waveguides are proposed having large bandwidth, low group velocity dispersion and allowing a flexible control of slow light properties with reasonable requirements to clean room fabrication. An overall approach to improve the delay-bandwidth product of present slow light devices is proposed. By using this approach, the normalized delay-bandwidth product of previous waveguides has been improved by a factor of 15 if compared with regular photonic crystal waveguides with a group index maintained at the high value of 90. The fabrication induced losses have also been studied. We modeled four kinds of structure disorders in real fabrication. The obtained results quantify how much the region close to the line defect center has a dominant influence on the losses. Finally, all design results have been used for the fabrication of silicon-on-insulator samples prepared for the demonstration of the foreseen slow light effects.
Slow Light Photonic Crystal Line Defect Waveguides
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Author : Alexander Petrov
language : en
Publisher: Cuvillier Verlag
Release Date : 2008
Slow Light Photonic Crystal Line Defect Waveguides written by Alexander Petrov and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Propagation Loss In Slow Light Photonic Crystal Waveguides
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Author : Sebastian Andreas Schulz
language : en
Publisher:
Release Date : 2012
Propagation Loss In Slow Light Photonic Crystal Waveguides written by Sebastian Andreas Schulz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Light categories.
Ultra Low Loss And Wideband Photonic Crystal Waveguides For Dense Photonic Integrated Systems
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Author : Aliakbar Jafarpour
language : en
Publisher:
Release Date : 2006
Ultra Low Loss And Wideband Photonic Crystal Waveguides For Dense Photonic Integrated Systems written by Aliakbar Jafarpour and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Crystal optics categories.
This thesis reports on a new design of photonic crystal waveguides (PCWs) to achieve large guiding bandwidth, linear dispersion, single-mode behavior, good coupling efficiency to dielectric waveguides, and small loss. The design is based on using the linear dispersion region of one PCW in the photonic bandgap (PBG) of another PCW. While perturbing the period can result in a PCW with linear dispersion and large guiding bandwidth, it introduces an odd mode at those frequencies, as well. By using another perturbation scheme, it is shown that single-mode behavior can also be achieved. The linear dispersion of these waveguides and their operation at lower frequencies of the PBG, where the density of states of radiation modes is smaller, gives rise to very small loss coefficients as verified experimentally. Full characterization of a waveguide requires the measurement of not only the transmission coefficient, but also the dispersion and spectral phase. We have developed a real-time characterization technique based on spectral interferometry with femtosecond laser pulses at optical communication wavelengths to measure the spectral phase of waveguides. This characterization technique can be used to study fast dynamics in timevarying structures and makes the alignment easy.
Slow Light Photonic Crystal Devices For High Speed Optical Signal Processing
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Author : Jan-Michael Brosi
language : en
Publisher: Karlsruher Institut Fur Technologie
Release Date : 2009
Slow Light Photonic Crystal Devices For High Speed Optical Signal Processing written by Jan-Michael Brosi and has been published by Karlsruher Institut Fur Technologie this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Technology (General) categories.
This book discusses design, modeling, and the characterization of slow-light photonic crystal waveguides. Guidelines are developed to obtain slow-light waveguides with broadband characteristics and with low disorder-induced losses. Three functional devices are proposed and studied: A tunable dispersion compensator, a tunable optical delay line, and a high-speed electro-optic modulator. Optical and microwave measurements confirm the designs.
Slow Light
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Author : Jacob B. Khurgin
language : en
Publisher: CRC Press
Release Date : 2018-10-08
Slow Light written by Jacob B. Khurgin and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-10-08 with Science categories.
One of the Top Selling Physics Books according to YBP Library Services The exotic effects of slow light have been widely observed in the laboratory. However, current literature fails to explore the wider field of slow light in photonic structures and optical fibers. Reflecting recent research, Slow Light: Science and Applications presents a comprehensive introduction to slow light and its potential applications, including storage, switching, DOD applications, and nonlinear optics. The book covers fundamentals of slow light in various media, including atomic media, semiconductors, fibers, and photonic structures. Leading authorities in such diverse fields as atomic vapor spectroscopy, fiber amplifiers, and integrated optics provide an interdisciplinary perspective. They uncover potential applications in both linear and nonlinear optics. While it is impossible to account for all the captivating developments that have occurred in the last few years, this book provides an exceptional survey of the current state of the slow light field.
Characteristics Of Defect Modes Slow Light And Disorder In Photonic Crystals
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Author : Michelle Lynn Povinelli
language : en
Publisher:
Release Date : 2004
Characteristics Of Defect Modes Slow Light And Disorder In Photonic Crystals written by Michelle Lynn Povinelli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
(Cont.) Chapter 5 analyzes slow-light, band-edge waveguides for compact, integrated, tun- able optical time delays. Slow group velocities at the photonic band edge give rise to large changes in time delay for small changes in refractive index, shrinking device size. Figures of merit are defined for tuning sensitivity and signal dispersion. Exact calculations for a realistic, three-dimensional grating structure are shown to be well predicted by a simple quadratic-band model, simplifying device design. Chapter 6 derives a general, coupled-mode theory for disorder-induced scattering in strongly periodic systems. The analytical results allow the comparison of photonic- crystal waveguides to similar index-guided waveguides. In the realistic limit of weak disorder, reflections are identical while transmission is higher for the photonic-crystal waveguide. The general results, verified by direct numerical simulations in an example system, suggest a new mechanism for the design of low-loss waveguides.
High Efficiency Devices Based On Slow Light In Photonic Crystals
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Author : Murtaza Askari
language : en
Publisher:
Release Date : 2011
High Efficiency Devices Based On Slow Light In Photonic Crystals written by Murtaza Askari and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Electromagnetic waves categories.
Photonic crystals have allowed unprecedented control of light and have allowed bringing new functionalities on chip. Photonic crystal waveguides (PCWs), which are linear defects in a photonic crystal, have unique features that distinguish these waveguides from other waveguides. The unique features include very large dispersion, existence of slow light, and the possibility of tailoring the dispersion properties for guiding light. In my research, I have overcome some of the challenges in using slow light in PCWs. In this work, I have demonstrated (i) high efficiency coupling of light into slow group velocity modes of a PCW, (ii) large bandwidth high transmission and low dispersion bends in PCWs, (iii) accurate modeling of pulse propagation in PCWs, (iv) high efficiency absorbing boundary conditions for dispersive slow group velocity modes of PCWs. To demonstrate the utility of slow light in designing high efficiency devices, I have demonstrated refractive index sensors using slow light in PCWs. In the end, a few high efficiency devices based on slow light in PCWs are mentioned. The remaining issues in the widespread use of PCW are also discussed in the last chapter.
Handbook Of Silicon Photonics
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Author : Laurent Vivien
language : en
Publisher: Taylor & Francis
Release Date : 2016-04-19
Handbook Of Silicon Photonics written by Laurent Vivien and has been published by Taylor & Francis this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-04-19 with Science categories.
The development of integrated silicon photonic circuits has recently been driven by the Internet and the push for high bandwidth as well as the need to reduce power dissipation induced by high data-rate signal transmission. To reach these goals, efficient passive and active silicon photonic devices, including waveguide, modulators, photodetectors,
Photonic Crystal Waveguides In Chalcogenide Glasses
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Author : Marcel Spurny
language : en
Publisher:
Release Date : 2011
Photonic Crystal Waveguides In Chalcogenide Glasses written by Marcel Spurny and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Chalcogenides categories.