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.

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.

This book presents the key technologies of coherent optical wireless communication, covers topics such as beam coupling, signal optical polarization control and distorted wavefront correction. It discusses the principle of coherent optical communication and heterodyne detection conditions. In this book, the array coupling receiving technology and large aperture coupling technology are introduced to realize the spatial optical fiber coupling; simulated annealing algorithm, particle swarm optimization algorithm and SPO algorithm are used to control the polarization state of the signal beam; and the correction of distorted wavefront of the signal beam by adaptive optics technology and wavefront sensorless adaptive optics technology are analyzed, and the influence of beam mode on coherent detection performance is elaborated. Both theoretical deduction and experimental results are included in this book, which can help readers further understand the theoretical knowledge.

Fiber-optic communication systems have advanced dramatically over the last four decades, since the era of copper cables, resulting in low-cost and high-bandwidth transmission. Fiber optics is now the backbone of the internet and long-distance telecommunication. Without it we would not enjoy the benefits of high-speed internet, or low-rate international telephone calls. This book introduces the basic concepts of fiber-optic communication in a pedagogical way. The important mathematical results are derived by first principles rather than citing research articles. In addition, physical interpretations and real-world analogies are provided to help students grasp the fundamental concepts. Key Features: Lucid explanation of key topics such as fibers, lasers, and photodetectors. Includes recent developments such as coherent communication and digital signal processing. Comprehensive treatment of fiber nonlinear transmission. Worked examples, exercises, and answers. Accompanying website with PowerPoint slides and numerical experiments in MATLAB. Intended primarily for senior undergraduates and graduates studying fiber-optic communications, the book is also suitable as a professional resource for researchers working in the field of fiber-optic communications.

This book constitutes the refereed post-conference proceedings of the 8th EAI International Conference on Green Energy and Networking, GreeNets 2021, held in Dalian, China, June 6-7, 2021. The 31 revised full papers were carefully selected form 85 submissions. The papers are organized thematically in green energy, green communication and networking, intelligent lighting control, machine learning, nonlinear system and circuits, and image encryption. The papers present a wide range of applications in civilian and commercial areas to reduce the impact of the climate change, while maintaining social prosperity.

The book Optical Fiber and Wireless Communications provides a platform for practicing researchers, academics, PhD students, and other scientists to review, plan, design, analyze, evaluate, intend, process, and implement diversiform issues of optical fiber and wireless systems and networks, optical technology components, optical signal processing, and security. The 17 chapters of the book demonstrate capabilities and potentialities of optical communication to solve scientific and engineering problems with varied degrees of complexity.

The book, now in its third edition, is thoroughly revised and updated as per the new syllabi of Optical Fiber Communication of various universities. The material is well-presented and designed for undergraduate and postgraduate students pursuing courses in Electrical Engineering, and Electronics and Telecommunication Engineering. The book offers a completely accessible and in-depth knowledge of the principles and applications of optical fiber communication (OFC). It deals with materials, devices, components, and systems of OFC. The coverage includes key concepts such as properties of light, evolution and elements of OFC, its benefits, along with applications in optical LAN and communication links. The attenuation loss of different types, dispersion mechanism, photon sources (LED and lasers), detectors (PIN and avalanche), analog and digital transmitter and receiver systems, connectorization, OADM, and amplifiers are described. Built-up of long haul OFC links at 8 Mb/s and 2.5 Gb/s, and optical interface are explained with illustrations. It also contains solved numerical problems for better understanding of topics. KEY FEATURES • Includes optical fiber LAN for data centres and industries • Provides detail treatment of LED, semiconductor, lasers, Tx and Rx • Discusses all optical communications links and optical networks • Includes important questions with answers • Provides practice papers and model test papers

This book introduces in detail the theory of adaptive optics and its correction technology for light wave distortion in wireless optical communication. It discusses the adaptive control algorithm of wavefront distortion, proportional+integral control algorithm and iterative control algorithm, and double fuzzy adaptive PID control algorithm. It also covers the SPGD algorithm of adaptive optics correction, deformable mirrors eigenmode method of wavefront aberration correction, vortex beam wavefront detecting wavefront aberration correction, liquid crystal spatial light modulator wavefront correction, different wavelengths of Gaussian beam transmission wavefront differences in the atmospheric turbulence and correction and with wavefront tilt correction adaptive optics wavefront aberration correction. Various distortion correction methods are verified by experiments and the experimental results are analyzed. This book is suitable for engineering and technical personnel engaged in wireless optical communication, college teachers, graduate students and senior undergraduate students.

In the last decade, China has experienced one of the fastest economic growth in the world. Leading this enormous growth is the development of telecommunications that has a growth rate far exceeding that of its GNP. With such fast growth, China will have the largest telecommunication network with 420 million lines by 2010. The backbone of the national telecom network in China is primarily optical fiber cables today.This book contains a selection of reports reviewing the progress of the research and development in optoelectronics and optical fiber communications in China. The first four papers focus on the current development in optical fiber communications with particular interest in studies of soliton transmission and optical WDM transmission experiments. The next four papers describe the research results on quantum well lasers, bi-stable lasers, electro-absorption modulators and SEED, and photonic integrated devices. Fiber ring lasers using EDFA and the ASE noise in the PIN receiver due to EDFA are discussed in the next two papers, respectively. The last two papers describe the research activities and results of the development of the GaAs ICs for high speed lighwave systems, and their characterization using optical sampling techniques. The contents included in this book may be regarded as the epitome of the current status of research in this field in mainland China.