Tài liệu OPTICAL COMMUNICATION THEORY AND TECHNIQUES ppt

[...]... depiction of optical communications as an early science is well reflected by the most known journals and conferences of this area, where technological and experimental aspects usually play a predominant role On the other hand, this book, namely Optical Communications Theory and Techniques, is intended to be a collection of up-to-date papers dealing with the theoretical aspects of optical communications... format?” Coding Theory and Techniques This part is concerned with the theory and techniques of coding, applied to optical systems For instance, different forward error correction (FEC) codes are analyzed and compared, taking explicitly into account the non-AWGN (Additive White Gaussian Noise) nature of the channel Characterizing, Measuring, and Calculating Performance in Optical Fiber Communication Systems... written by worldwide recognized experts in the field, and were presented at the 2004 Tyrrhenian International Workshop on Digital Communications According to the program of the workshop, the book is divided into four parts: Information and Communication Theory for Optical Communications This first part examines optical systems from a rigorous information theory point of view, addressing questions like “what... and to Marco Secondini and Karin Ennser, who generously helped in the preparation of this book The Workshop would not have been possible without the support of the Italian National Consortium for Telecommunications (CNIT), and without the sponsorship of the following companies, which are gratefully acknowledged This page intentionally left blank I INFORMATION AND COMMUNICATION THEORY FOR OPTICAL COMMUNICATIONS... Robinson, and M Taylor, “Modulation instability and its impact in multispan optical amplified imdd systems: theory and experiments,” J Lightwave Technol., vol 15, pp 1071–1082, July 1997 [8] C Lorattanasane and K Kikuchi, “Parametric instability of optical amplifier noise in long-distance optical transmission systems,” IEEE J Quantum Electron., vol 33, pp 1058–1074, July 1997 [9] A Vannucci, P Serena, and. .. on October 2004 as a topical meeting on Optical Communication Theory and Techniques , is much indebted and wish to express his sincere thanks to the organizers of the technical sessions, namely Joseph M Kahn from Stanford University, USA, Sergio Benedetto from Politecnico di Torino, Italy, Curtis R Menyuk from University of Maryland Baltimore County, USA, and Klaus Petermann from Technische Universität... efficiency and robustness against transmission impairments, researchers have investigated a variety of binary and non-binary modulation techniques, in conjunction with various detection techniques In this paper, we compare the spectral efficiencies and signal-to-noise ratio (SNR) requirements of several modulation and detection techniques We assume that amplified spontaneous emission (ASE) from optical. .. balanced optical receiver In the case of M-DPSK, a pair of MachZehnder interferometers (with excess phase shifts of 0 and and a pair of balanced receivers are used to determine the in-phase and quadrature components of the phase change between successive symbols Tonguz and Wagner [8] showed that the performance of DPSK with optical amplification and interferometric detection is equivalent to standard... b/s/Hz, 4-DPSK and 4PSK are perhaps the most attractive techniques At spectral efficiencies above 2 b/s/Hz, 8-PSK and 8- and 16-QAM become the most attractive techniques Table 2 compares key attributes of direct, interferometric and coherent detection The key advantages of interferometric detection over direct detection lie in the superior SNR efficiency of 2- and 4-DPSK as compared to 2- and 4-PAM Coherent... polarization, leading to outstanding SNR efficiency for 2- and 4-PSK, and still reasonable SNR efficiency for 8-PSK and for 8- and 16-QAM Coherent detection also enables electrical channel demultiplexing and CD compensation Coherent detection requires a local oscillator laser and polarization control, which are significant drawbacks Laser phase noise has traditionally been a concern for optical systems using . Tamburini, Sante Andreoli, and Tommaso Occhipinti 13 3 21 29 37 45 53 63 79 87 Part II Coding Theory and Techniques Channel Coding for Optical Communications Sergio. modulation format?”. Coding Theory and Techniques. This part is concerned with the theory and techniques of coding, applied to optical systems. For instance,