Download or read book Optical phase conjugation and its application in the compensation of fiber Kerr nonlinearities written by Xuefeng Tang and published by . This book was released on 2005 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avec l'augmentation du débit et du nombre de canaux dans les télécommunications optiques, la non linéarité de la fibre, en particulier l'effet de Kerr, est considérée comme une des limitations les plus importantes de la performance au niveau de la transmission. La conjugaison de phase optique (OPC, optical phase conjugation), une technique optique non-linéaire, reçoit de plus en plus d'attention grâce à sa capacité à compenser la dispersion, ainsi que les effets non linaires. Dans cette thèse, nous étudions le processus de la compensation pour les effets non linéaires, incluant l'auto-modulation de phase, la modulation de phase croisée, l'interaction non-linaire intra canal, l'amplification non-linaire du bruit dans le système OPC. Il est démontré que l'OPC a une capacité de compenser efficacement les effets non linéaires, pourtant sa performance de compensation est influencée considérablement par plusieurs facteurs tels que la symétrie de l'évolution du signal, le régime de la dispersion et la configuration de la liaison. Avec l'optimisation pour la carte de dispersion, la performance de l'OPC peut être fortement améliorée, ce qui facilite la mise en œuvre de schéma de multiplexage soit par TDM ( time-division-multiplexing ), soit par WDM (wavelength-division-multiplexing). De plus, à partir de l'étude de l'effet de réglage de la température sur le processus QPM-DFG (quasi-phase-matching difference-frequency generation) basé sur un cristal de PPLN ( periodically poled LiNbO3), nous proposons une méthode de réglage correspondant aux différentes zones de température du PPLN pour améliorer la performance du QPM-DFG.

Download or read book Optical Phase Conjugation written by Robert A. Fisher and published by Academic Press. This book was released on 2012-12-02 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book appears at a time of intense activity in optical phase conjugation. We chose not to await the maturation of the field, but instead to provide this material in time to be useful in its development. We have tried very hard to elucidate and interrelate the various nonlinear phenomena which can be used for optical phase conjugation.

Download or read book Digital Signal Processing Techniques for Fiber Nonlinearity Compensation in Coherent Optical Communication Systems written by O. S. Sunish Kumar and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The capacity of long-haul coherent optical communication systems is limited by the detrimental effects of fiber Kerr nonlinearity. The power-dependent nature of the Kerr nonlinearity restricts the maximum launch power into the fiber. That results in the reduction of the optical signal-to-noise ratio at the receiver; thereby, the maximum transmission reach is limited. Over the last few decades, several digital signal processing (DSP) techniques have been proposed to mitigate the effects of fiber nonlinearity, for example, digital back-propagation (DBP), perturbation based nonlinearity compensation (PB-NLC), and phase-conjugated twin wave (PCTW). However, low-complexity and spectrally efficient DSP-based fiber nonlinearity mitigation schemes for long-haul transmission systems are yet to be developed. In this thesis, we focus on the computationally efficient DSP-based techniques that can help to combat various sources of fiber nonlinearity in long-haul coherent optical communication systems. With this aim, we propose a linear time/polarization coded digital phase conjugation (DPC) technique for the mitigation of fiber nonlinearity that doubles the spectral efficiency obtained in the PCTW technique. In addition, we propose to investigate the impact of random polarization effects, like polarization-dependent loss and polarization mode dispersion, on the performance of the linear-coded DPC techniques. We also propose a joint technique that combines single-channel DBP with the PCTW technique. We show that the proposed scheme is computationally efficient and achieves similar performance as multi-channel DBP in wavelength division multiplexed superchannel systems. The regular perturbation (RP) series used to analytically approximate the solution of the nonlinear Schrödinger equation (NLSE) has a serious energy divergence problem when truncated to the first-order. Recent results on the transmission of high data-rate optical signals reveal that the nonlinearity compensation performance of the first-order PB-NLC technique decreases as the product of the transmission distance and launch power increases. The enhanced RP (ERP) method can improve the accuracy of the first-order RP approximation by partially solving the energy divergence problem. On this ground, we propose an ERP-based nonlinearity compensation technique to compensate for the fiber nonlinearity in a polarization-division multiplexed dispersion unmanaged optical communication system. Another possible solution to improve the accuracy of the PB-NLC technique is to increase the order of the RP solution. Based on this idea, we propose to extend the first-order solution of the NLSE to the second-order to improve the nonlinearity compensation performance of the PB-NLC technique. Following that, we investigate a few simplifying assumptions to reduce the implementation complexity of the proposed second-order PB-NLC technique.

Download or read book Ultrahigh Speed Optical Transmission Technology written by Hans-Georg Weber and published by Springer Science & Business Media. This book was released on 2007-12-28 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a detailed description of all the aspects of ultrahigh speed optical transmission technology. Ultrahigh-speed optical transmission technology is a key technology for increasing communication capacity. The devices developed for ultrahigh-speed optical transmission are not limited to communication applications only. They are key devices for high-speed optical signal processing, i.e. monitoring, measurement and control, and will thus give a wide technological basis for innovative science and technology. All these aspects of ultrahigh-speed optical transmission technology are described in detail in this book.

Download or read book Odyssey of Light in Nonlinear Optical Fibers written by Kuppuswamy Porsezian and published by CRC Press. This book was released on 2017-12-19 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Odyssey of Light in Nonlinear Optical Fibers: Theory and Applications presents a collection of breakthrough research portraying the odyssey of light from optical solitons to optical rogue waves in nonlinear optical fibers. The book provides a simple yet holistic view on the theoretical and application-oriented aspects of light, with a special focus on the underlying nonlinear phenomena. Exploring the very frontiers of light-wave technology, the text covers the basics of nonlinear fiberoptics and the dynamics of electromagnetic pulse propagation in nonlinear waveguides. It also highlights some of the latest advances in nonlinear optical fiber technology, discussing hidden symmetry reductions and Ablowitz–Kaup–Newell–Segur (AKNS) hierarchies for nonautonomous solitons, state-of-the-art Brillouin scattering applications, backpropagation, and the concept of eigenvalue communication—a powerful nonlinear digital signal processing technique that paves the way to overcome the current limitations of traditional communications methods in nonlinear fiber channels. Key chapters study the feasibility of the eigenvalue demodulation scheme based on digital coherent technology by throwing light on the experimental study of the noise tolerance of the demodulated eigenvalues, investigate matter wave solitons and other localized excitations pertaining to Bose–Einstein condensates in atom optics, and examine quantum field theory analogue effects occurring in binary waveguide arrays, plasmonic arrays, etc., as well as their ensuing nonlinear wave propagation. Featuring a foreword by Dr. Akira Hasegawa, the father of soliton communication systems, Odyssey of Light in Nonlinear Optical Fibers: Theory and Applications serves as a curtain raiser to usher in the photonics era. The technological innovations at the core of the book form the basis for the next generation of ultra-high speed computers and telecommunication devices.

Download or read book Optical Communication Systems written by Andrew Ellis and published by CRC Press. This book was released on 2019-09-02 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Telecommunications have underpinned social interaction and economic activity since the 19th century and have been increasingly reliant on optical fibers since their initial commercial deployment by BT in 1983. Today, mobile phone networks, data centers, and broadband services that facilitate our entertainment, commerce, and increasingly health provision are built on hidden optical fiber networks. However, recently it emerged that the fiber network is beginning to fill up, leading to the talk of a capacity crunch where the capacity still grows but struggles to keep up with the increasing demand. This book, featuring contributions by the suppliers of widely deployed simulation software and academic authors, illustrates the origins of the limited performance of an optical fiber from the engineering, physics, and information theoretic viewpoints. Solutions are then discussed by pioneers in each of the respective fields, with near-term solutions discussed by industrially based authors, and more speculative high-potential solutions discussed by leading academic groups.

Download or read book Impact of Nonlinearities on Fiber Optic Communications written by Shiva Kumar and published by Springer Science & Business Media. This book was released on 2011-03-23 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the recent progress in fiber-optic communication systems with a main focus on the impact of fiber nonlinearities on the system performance. Over the past few years, there has been significant progress in coherent communication systems mainly because of the advances in digital signal processing techniques. This has led to renewed interest in fiber linear and nonlinear impairments and techniques to mitigate them in electrical domain. In this book, the reader will find all the important topics of fiber optic communication systems in one place with in-depth coverage by the experts of each subtopics. Pioneers from each of the sub-topics have been invited to contribute. Each chapter will have a section on fundamentals, review of literature survey and the recent developments. The reader will benefit from this approach since many of the conference proceedings and journal articles mainly focus on the authors’ research work without spending space on preliminaries.

Download or read book Nonlinear Optics in Telecommunications written by Thomas Schneider and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive and didactic overview explores the nonlinear effects from a physical point of view and discusses the implications for signal capacity. Enriched with practical considerations and experimental results, the book offers special chapters dealing with applications of nonlinear effects for signal processing, ultrafast-optical switching, wavelength conversion, nonlinear amplification, and optical phase-conjugation. Equipped with chapter-end summaries and problems, this valuable reference can also serve as a graduate-level textbook.

Download or read book Future Information Communication Technology and Applications written by Hoe-Kyung Jung and published by Springer Science & Business Media. This book was released on 2013-05-25 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings are based on the 2013 International Conference on Future Information & Communication Engineering (ICFICE 2013), which will be held at Shenyang in China from June 24-26, 2013. The conference is open to all over the world, and participation from Asia-Pacific region is particularly encouraged. The focus of this conference is on all technical aspects of electronics, information, and communications ICFICE-13 will provide an opportunity for academic and industry professionals to discuss the latest issues and progress in the area of FICE. In addition, the conference will publish high quality papers which are closely related to the various theories and practical applications in FICE. Furthermore, we expect that the conference and its publications will be a trigger for further related research and technology improvements in this important subject.

Download or read book Physics and Applications of Optical Solitons in Fibres 95 written by Akira Hasegawa and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the proceedings of the invited talks presented at the International Symposium of Physics and Application of Optical Solitons in Fibers held in Kyoto during November 14 to 17,1995. As a result of worldwide demand for ultra high bitrate transmissions and increased scientific interests from the soliton community, research on optical solitons in fibers has made a remarkable progress in recent years. In view of these trends, and with the support of the Japanese Ministry of Posts and Telecommunications, the Research Group for Optical Soliton Communications (ROSC), chaired by Akira Hasegawa, was established in Japan in April 1995 to promote collaboration and information exchange 'among communication service companies, industries and academic circles in the theory and application of optical solitons. This symposium was organized as a part of the ROSC activities. The symposium attracted enthusiastic response by worldwide researchers involved in this subject which has lead to the most intensive meeting that the editor ever attended. The reader will find the contents to be well-balanced among theory, experiment and technology. Although the evaluation of the contents shall naturally depend on the particular area of interest of the reader, the symposium has confirmed that the soliton based light wave transmission has achieved the best result in one channel, both in distance of transmission and in bitrate although in wavelength division multiplexed (WDM) systems, NRZ transmission has yet better result.

Download or read book Selected Papers on Adaptive Optics for Atmospheric Compensation written by James E. Pearson and published by SPIE-International Society for Optical Engineering. This book was released on 1994 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optical Code Division Multiple Access written by Paul R. Prucnal and published by CRC Press. This book was released on 2018-10-03 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Code-division multiple access (CDMA) technology has been widely adopted in cell phones. Its astonishing success has led many to evaluate the promise of this technology for optical networks. This field has come to be known as Optical CDMA (OCDMA). Surveying the field from its infancy to the current state, Optical Code Division Multiple Access: Fundamentals and Applications offers the first comprehensive treatment of OCDMA from technology to systems. The book opens with a historical perspective, demonstrating the growth and development of the technologies that would eventually evolve into today's optical networks. Building on this background, the discussion moves to coherent and incoherent optical CDMA coding techniques and performance analysis of these codes in fiber optic transmission systems. Individual chapters provide detailed examinations of fiber Bragg grating (FBG) technology including theory, design, and applications; coherent OCDMA systems; and incoherent OCDMA systems. Turning to implementation, the book includes hybrid multiplexing techniques along with system examples and conversion techniques to connect networks that use different multiplexing platforms, state-of-the-art integration technologies, OCDMA network security issues, and OCDMA network architectures and applications, including a look at possible future directions. Featuring contributions from a team of international experts led by a pioneer in optical technology, Optical Code Division Multiple Access: Fundamentals and Applications places the concepts, techniques, and technologies in clear focus for anyone working to build next-generation optical networks.

Download or read book Principles of Phase Conjugation written by B.Y. Zel'Dovich and published by Springer. This book was released on 2013-06-29 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has been prompted by our des ire to share with others our apprecia tion of the harmony and beauty in a particular sphere of modern optics known as "optical phase conjugation". Practical applications of the phase conjugated wave are likely to be far-reaching. Optical phase conjugation (OPC) combines in itself aesthetic and pragmatic attractiveness, a synthesis that has made OPC a subject of general attention. The figure presents the ap proximate rate of publications (number of articles per year) on OPC in the world literature for recent years, the lower curve denoting the work carried out in the USSR. The efforts of a large unofficial international collective have yielded an impressive result. 150 100 50 1975 1980 At present, the physical pro ces ses underlying various OPC methods are quite understandable, and it is the physics of OPC to which our book is devoted. Practical and scientific applications of phase-conjugated waves, which are of no less interest, have been touched upon in short, as major achievements in this sphere are a matter of the future. Today there are two main methods of OPC: i) by backward stimulated light scattering, ii) by four-wave mixing. Naturally, much attention is given to these methods in our book which, after the introductory Chap. 1, can be divided into two almost independent parts - Chaps. 2 - 5, and Chaps. 6 - 8.

Download or read book Nonlinear Guided Waves Their Applications written by and published by . This book was released on 1998 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optical Fiber Telecommunications IIIA written by Thomas L. Koch and published by Elsevier. This book was released on 2012-12-02 with total page 629 pages. Available in PDF, EPUB and Kindle. Book excerpt: Updated to include the latest information on light wave technology, Optical Fiber Telecommunication III, Volumes A & B are invaluable for scientists, students, and engineers in the modern telecommunications industry. This two-volume set includes the most current research available in optical fiber telecommunications, light wave technology, and photonics/optoelectronics. The authors cover important background concepts such as SONET, coding device technology, andWOM components as well as projecting the trends in telecommunications for the 21st century. - One of the hottest subjects of today's technology - Includes the most up-to-date research available in optical fiber telecommunications - Projects the trends in telecommunications for the 21st century

Download or read book Optical Fiber Telecommunications written by Alan Willner and published by Academic Press. This book was released on 2019-05-15 with total page 1118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Fiber Telecommunications, Volume Eleven, covers the latest in optical fiber communications and their potential to penetrate and complement other forms of communication, such as wireless access, on-premises networks, interconnects and satellites. This updated edition of this classic, first published in 1979, examines opportunities for future optical fiber technology by presenting the latest advances on key topics, such as 5G wireless access, inter and intra data center communications, THz technologies, secure communications, and free space digital optical links. Topics of note include sections on foundries for widespread user access, designing photonic integrated circuits (PICs), monolithic and hybrid integration technologies, nanophotonics, and advanced and non-conventional data modulation formats. The traditional emphasis of achieving higher data rates and longer transmission distances are also addressed through chapters on space-division-multiplexing using multimode and multicore fibers, undersea cable systems, and reconfigurable networking. This book is an indispensable reference on the latest advances in key technologies for future fiber optic communications. It is suitable for university and industry researchers, graduate students, optical systems implementers, network operators, managers and investors. Updated edition presents the latest advances in optical fiber components, systems, subsystems and networks Written by leading authorities from academia and industry Gives a self-contained overview of specific technologies, covering both the state-of-the-art and future research challenges

Download or read book Studies of Optical Wave Mixing and Phase Conjugation written by and published by . This book was released on 1997 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this research is to carry out theoretical and experimental investigation on optical wave mixing and phase conjugation in various nonlinear media, including photorefractive crystals and optical fibers, as well as novel applications using these nonlinear optical effects. During the research period, we have carried out intensive theoretical and experimental investigation in several important areas in wave mixing and phase conjugation, including the problem of multigrating effects in MPPC, fanning noise reduction by using partially coherent beams, grating enhancement and restoration in photorefractive media, fidelity of image restoration in multimode fibers, reflection-based phase conjugators, cross-talk noise in volume holographic storage, optical phase conjugation and pulse restoration in single mode fibers, photorefractive spatial mode converter for multimode-to-single-mode fiber-optic coupling, energy coupling by partially degenerate four-wave mixing in multichannel lightwave systems, form birefringence of layered media and volume gratings, the effect of beam coherence on mutually pumped phase conjugators (MPPC), polarization-dependent mechanism transformation during self-pumped phase conjugation in Ce:BaTiO3, intensity-dependent absorption and photorefractive properties of some new crystals, including Rb:KNbO3, and Ce:BaTiO3.