Download or read book High speed Optical Fibre Transmission Using Advanced Modulation Formats written by S. Makovejs and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid growth in interactive bandwidth-hungry services demands ever higher capacity at various stages of the optical network, leading to a potential capacity exhaust, termed the capacity crunch. The main aim of the research work described in this thesis was to help solve the potential capacity crunch by exploring techniques to increase the data rate, spectral efficiency and reach of optical fibre systems. The focus was on the use of advanced signal modulation formats, including optical time-division multiplexing (OTDM), quadrature phase shift keying (QPSK), and 16-state quadrature amplitude modulation (QAM16). QPSK and QAM16 modulations formats were studied in combination with coherent detection and digital signal processing (DSP) for the compensation of transmission impairments. In addition, return-to-zero (RZ) pulses were explored to increase the tolerance towards nonlinearity for coherently detected signals, and nonlinearity compensation (NLC) through the DSP. Initially, to maximise the bit-rate, research was focused on the study of OTDM transmission at 80Gbit/s with the aim to optimise the phase difference between the adjacent OTDM channels. A new technique to achieve bit-wise phase control using a phase-stabilised fibre interferometer was proposed. Faced with a limited fibre capacity, the need to maximise the spectral efficiency became paramount, and thus the need to use phase, amplitude and polarisation domains for signal transmission. In combination with coherent detection the research focused on the performance of optical fibre systems using QPSK and QAM16 modulation formats, including their generation, transmission and detection in single-channel and WDM regimes. This included the study of the impact of pulse shapes, and the mitigation of linear and nonlinear transmission impairments with receiver-based DSP at bit-rates ranging from 42.7 to 224Gbit/s. The technique demonstrated for bit-wise phase control for OTDM was successfully used to demonstrate a new method for QAM16 signal generation. Longest transmission distances (up to 10160km in 112Gbit/s QPSK, 4240km in 112Gbit/s QAM16, and 2000km in 224Gbit/s QAM16) have been achieved with the use of NLC and RZ pulses. The efficiency of these two techniques is explored through a comprehensive set of experiments in both single-channel and WDM transmission experiments. The results can be used in the design of future optical transmission systems.

Download or read book High Order Modulation for Optical Fiber Transmission written by Matthias Seimetz and published by Springer. This book was released on 2009-06-06 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catering to the current interest in increasing the spectral efficiency of optical fiber networks by the deployment of high-order modulation formats, this monograph describes transmitters, receivers and performance of optical systems with high-order phase and quadrature amplitude modulation. In the first part of the book, the author discusses various transmitter implementation options as well as several receiver concepts based on direct and coherent detection, including designs of new structures. Hereby, both optical and electrical parts are considered, allowing the assessment of practicability and complexity. In the second part, a detailed characterization of optical fiber transmission systems is presented, regarding a wide range of modulation formats. It provides insight in the fundamental behavior of different formats with respect to relevant performance degradation effects and identifies the major trends in system performance.

Download or read book Optical Fiber Telecommunications VIB written by Masataka Nakazawa and published by Elsevier Inc. Chapters. This book was released on 2013-05-11 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: We provide on overview of fundamental technologies and recent challenges on extremely higher-order quadrature amplitude modulation (QAM) such as 256–1024 levels, toward the realization of an ultrahigh spectral efficiency approaching the Shannon limit. Key components required for such a higher-order QAM transmission are described in detail, including a coherent light source, an optical phase-locked loop, an IQ modulator, and a digital demodulator. We also present recent demonstrations of single-carrier 1024 QAM, 256 QAM-OFDM, and OTDM-RZ/32 QAM transmissions realized with these fundamental technologies.

Download or read book Digital Signal Processing For High speed Optical Communication written by Jianjun Yu and published by World Scientific Publishing Company. This book was released on 2018-03-09 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is an increasing tendency to integrate optical communication with wireless communication to satisfy continuously emerging (new) data communication demands. Thus, optical-wireless-integrated access networks and transmission systems, as well as LED-based visible light communication are attracting ever increasing research interest. Digital signal processing (DSP) is one new technology for optical transmission. As such this book is designed to pave the way to the better understanding of the deployment of DSP in optical fiber communication systems.Digital Signal Processing for High-Speed Optical Communication covers a wide area of DSP topics in optical communications, and describes state-of-the-art digital signal processing techniques for high-speed optical communication. In this book, numerous advanced digital signal processing techniques aiming at the promotion of the capacity increase and performance improvement of optical or optical-wireless communication systems and networks are presented and explained. Coverage includes new technologies, optical filter with MLSE, and new pre-coding and pre-equalization applicable to single-carrier and multi-carrier, direct-detection and coherent-detection optical commutation systems and networks.

Download or read book Optical Fiber Telecommunications VIA written by Leif Katsuo Oxenløwe and published by Elsevier Inc. Chapters. This book was released on 2013-05-03 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The serial optical data format has attracted attention for decades now, because of its promise to reduce the number of active components in a communication system. Indeed, historically increasing the serial bit rate by a factor of 4, reduced the cost per bit by 40%. Going beyond the available electronic bandwidth (roughly 100GHz today) can be obtained using optical time division multiplexing (OTDM), and symbol rates up to 1.28Tbaud per polarization have been demonstrated. As most optical signal processing devices operate on a per channel basis, it is advantageous to aggregate the data in a serial format, since this allows for optical signal processing of many bits in a single device. This chapter gives an overview of the state-of-the-art of OTDM systems to reach multi-Tbit/s serial data and means to handle these ultra-high bit rate signals using for instance nonlinear silicon waveguides for e.g. serial-to-parallel conversion.

Download or read book High Speed Optical Modulation Advanced Modulation Formats and Mode Division Multiplexing in Silicon Photonics written by Diego Pérez Galacho and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bandwidth demand in optical communication systems is continually growing. Data rate values in the order of several hundreds of TBps are expected in the near future. In order to cope with those expectations silicon based technologies are believed to be the best suited. Its naturally compatibility with CMOS easily enables the electronics and photonics co-integration. In the short-term the way increase data rates in next generation optical communication systems goes through using advanced modulation format and increase symbol rates. In the long-term view, new multiplexing techniques will be required. In this sense, mode division multiplexing is nowadays an attractive approach under consideration.In this Thesis work, the way to implement these new optical communication schemes is studied from the transmitter point of view. It includes, on a first part the modeling, design and characterization of silicon modulators. And in a second part, it includes the proposition, design and characterization of novel mode handling devices for mode division multiplexing.A new way of modeling silicon modulators has been developed. This new model permits to reduce the computation time of modulator analysis up to two orders of magnitude, while maintaining a good level of accuracy. Using the model, modulators based on lateral PN junctions and interdigitated PN junctions were designed to work in the O-Band of optical communications. Characterization work has been performed on these modulators with good results. Wide-open OOK (On Off Keying) eye diagrams with 10 dB extinction ratio were obtained at 10GBps. Furthermore, BPSK (Binary Phase Shift Keying) modulation was also demonstrated at 10GBps.New kind of mode converters and multiplexers, intended to work as mode division multiplexing subsystems have been proposed, designed, fabricated and characterized. Measured results show broad bandwidth operation with high extinction ratio.

Download or read book Optical Fiber Telecommunications VIB written by S. Chandrasekhar and published by Elsevier Inc. Chapters. This book was released on 2013-05-11 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical superchannel transmission has recently attracted much research and development effort, aiming to increase the capacity and cost-effectiveness of wavelength-division multiplexing (WDM) systems. The use of superchannels avoids the electronic bottleneck via optical parallelism, and provides high per-channel data rate and better spectral utilization, especially in transparent mesh optical networks. This chapter reviews recent advances in the generation, detection, and transmission of optical superchannels with channel data rates on the order of Terabits/s. Multiplexing schemes such as optical orthogonal-frequency-division-multiplexing (O-OFDM) and Nyquist WDM are described, in conjunction with modulation schemes such as OFDM and Nyquist-filtered single-carrier modulation. Superchannel transmission performance is discussed. Finally, networking implications brought by the use of superchannels, such as flexible-grid WDM, are also discussed.

Download or read book Ultrahigh Speed Optical Transmission Technology written by Hans-Georg Weber and published by Springer. This book was released on 2007-05-09 with total page 482 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 Space Division Multiplexing in Optical Communication Systems written by Masataka Nakazawa and published by Springer Nature. This book was released on 2022-08-29 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents new frontiers in data communication. To transcend the physical limitations of current optical communication technologies, totally new multiplexing schemes beyond TDM/WDM, novel transmission optical fibers handling well above Pbit/s capacity, and next-generation optical submarine cable systems will need to be developed. The book offers researchers working at the forefront, as well as advanced Ph.D. students in the area of optical fiber communications systems and related fields, an essential guide to state-of-the-art optical transmission technologies. It explores promising new technologies for the exabit era; namely, the three “M technologies”: multi-level modulation, multi-core fiber, and multi-mode control.

Download or read book Optical Fiber Telecommunications VIB written by Jin-xing Cai and published by Elsevier Inc. Chapters. This book was released on 2013-05-11 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing demand for capacity has driven the telecommunications community to focus on transmission studies with higher data rates and increasing spectral efficiency. However, high data rates and high SE are particularly challenging for transoceanic cable systems due to their extremely long transmission distances. With the advent of digital coherent receivers, the channel data rate has increased from 40Gb/s to 100Gb/s and beyond; the spectral efficiency has increased from 80% (0.8bits/s/Hz) to the most recent 600% (6bits/s/Hz); and the total capacity has increased from 6Tb/s to the most recent 30Tb/s. This chapter gives an overview of the most recent advances in undersea transmission technology since the last edition of Optical Fiber Telecommunications in 2007 focusing on coherent technology and 100Gb/s transmission.

Download or read book Fiber Optic Transmission Networks written by Stephan Pachnicke and published by Springer Science & Business Media. This book was released on 2011-09-20 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Next generation optical communication systems will have to transport a significantly increased data volume at a reduced cost per transmitted bit. To achieve these ambitious goals optimum design is crucial in combination with dynamic adaptation to actual traffic demands and improved energy efficiency. In the first part of the book the author elaborates on the design of optical transmission systems. Several methods for efficient numerical simulation are presented ranging from meta-model based optimization to parallelization techniques for solving the nonlinear Schrödinger equation. Furthermore, fast analytical and semi-analytical models are described to estimate the various degradation effects occurring on the transmission line. In the second part of the book operational aspects of optical networks are investigated. Physical layer impairment-aware routing and regenerator placement are studied. Finally, it is analyzed how the energy efficiency of a multi-layer optical core network can be increased by dynamic adaptation to traffic patterns changing in the course of the day.

Download or read book Digital Signal Processing In High Speed Optical Fiber Communication Principle and Application written by Jianjun Yu and published by Springer Nature. This book was released on 2020-07-06 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the principles and applications of optical fiber communication based on digital signal processing (DSP) for both single and multi-carrier modulation signals. In the context of single carrier modulation, it describes DSP for linear and nonlinear optical fiber communication systems, discussing all-optical Nyquist modulation signal generation and processing, and how to use probabilistic and geometrical shaping to improve the transmission performance. For multi-carrier modulation, it examines DSP-based OFDM signal generation and detection and presents 4D and high-order modulation formats. Lastly, it demonstrates how to use artificial intelligence in optical fiber communication. As such it is a useful resource for students, researches and engineers in the field of optical fiber communication.

Download or read book Optical Modulation written by Le Nguyen Binh and published by CRC Press. This book was released on 2017-11-22 with total page 849 pages. Available in PDF, EPUB and Kindle. Book excerpt: This books aims to present fundamental aspects of optical communication techniques and advanced modulation techniques and extensive applications of optical communications systems and networks employing single-mode optical fibers as the transmission system. New digital techqniues such as chromatic dispersion, polarization mode dispersion, nonlinear phase distortion effects, etc. will be discussed. Practical models for practice and understanding the behavior and dynamics of the devices and systems will be included.

Download or read book Optical Fiber Telecommunications VIB written by Xi Chen and published by Elsevier Inc. Chapters. This book was released on 2013-05-11 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this chapter, we present an overview of multicarrier transmission and its application to optical communication. Specifically, we first introduce the historical perspectives in the development of optical multicarrier technologies. We then present different variants of optical multicarrier transmission. We also highlight the problem of fiber nonlinearity in optical multicarrier transmission systems and present an analysis of fiber capacity under nonlinear impairments. Furthermore, we discuss applications of multicarrier techniques to long-haul systems, access networks, and free-space optical communication systems. Finally, we summarize with some possible research directions in implementing multicarrier technologies in optical transmission.

Download or read book High speed Optical Transceivers Integrated Circuits Designs And Optical Devices Techniques written by Yuyu Liu and published by World Scientific. This book was released on 2006-03-09 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the unique advantages and large inherent transmission capacity of optical fiber communication systems. The long-term and high-risk research challenges of optical transceivers are analyzed with a view to sustaining the seemingly insatiable demand for bandwidth. A broad coverage of topics relating to the design of high-speed optical devices and integrated circuits, oriented to low power, low cost, and small area, is discussed.Written by specialists with many years of research and engineering experience in the field of optical fiber communication, this book is essential for an audience dedicated to the development of integrated electronic systems for optical communication applications. It can also be used as a supplementary text for graduate courses on optical transceiver IC design.

Download or read book Advanced Modulation Formats and Nonlinear Mitigation for Spectral Efficient Optical Transmission Systems written by Ivan Fernandez de Jauregui Ruiz and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global data traffic is expected to reach up to 4.3 ZB per year by 2020. With the majority of the global communications being transported on submarine point-to-point fiber-optic systems, different cutting-edge technologies have been under research to cope with this unprecedented traffic growth. Continuous advances in high-speed integrated circuits have allowed the use of advanced modulation formats and digital signal processing (DSP) techniques to maximize the transmission spectral efficiency. With mitigation of fiber linear effects efficiently carried out by DSP with relative low-complexity, the capacity of modern fiber optic systems rests limited by fiber nonlinearities. To this extent, in the first part of this work, the performance and achievable benefits of low-complexity DSP techniques aiming to mitigate fiber Kerr nonlinear effects are investigated. Besides nonlinear compensation techniques, the use of multi-level modulation formats beyond 16QAM and high symbol rate channels have gained momentum to increase the system spectral efficiency. One of the major breakthroughs in the recent years, has been the introduction of QAM-based probabilistic constellation shaping (PCS-QAM), which has proven to outperform regular QAM formats. In this sense, in the second part of this work, the practical achievable rate increase brought by PCS-QAM for transoceanic distances is investigated. A theoretical and experimental comparison with other high-capacity formats is performed, and the design of a PCS-QAM for trans-Pacific distances is addressed. Finally, in the last section, several transmission records using the two above techniques are reported.

Download or read book Advance Modulation and Multiplexing in Optical Communication Systems written by Amin Malekmohammadi and published by LAP Lambert Academic Publishing. This book was released on 2010-12 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced optical modulation and multiplexing techniques have become a key ingredient to the design of modern WDM optically routed networks. This book, reviews the generation and detection of multigigabit/second intensity- and phase modulated formats and highlights their resilience to key impairments found in optical networking, such as optical amplifier noise, chromatic dispersion, WDM crosstalk and fiber nonlinearity. A novel multiplexing technique, namely Absolute Polar Duty Cycle Division Multiplexing (AP-DCDM) which is based on the polar signaling and different return to zero (RZ) duty cycles is reported for high speed optical fiber communication systems. Unlike all the other techniques, in AP-DCDM different users share the communication medium to transmit in the same time period and at the same carrier wavelength, but with different duty cycles. The unique duty cycle for each channel helps to regenerate data at the receiver