In spite of the tremendous information-carrying capacity of optical fibers, the performance of today's communication systems is limited by electronics speed in signal regeneration. There is a need for more efficient and cost-effective technologies to satisfy both transoceanic and terrestrial communication demands which continue to grow. Clearly the most exciting break-through has been the recent development of erbium-doped fiber amplifiers (EDFAs), which overcome the speed and cost limitations of electronically "repeatered" systems and enjoy such clear advantages as polarization insensitivity, temperature stability, quantum-limited noise figure, and immunity to interchannel crosstalk. Written by one of the developers of this major new technology, Erbium-Doped Fiber Amplifiers synthesizes - for the first time - many of the most important recent papers in the fast-growing literature to provide uniquely in-depth, interdisciplinary coverage of the theoretical foundations, essential characteristics, and practical applications of EDFAs. This wide-ranging book answers many of the most central questions researchers and designers may have, including how light is amplified in the doped fiber, the ultimate noise limits of fiber amplifiers, and the optimal locations of optical amplifiers in a system. Divided into three main sections, Erbium-Doped Fiber Amplifiers first considers the fundamentals of light amplification and noise in single-mode fibers, as well as the principles of photodetection of digital signals with optical amplifiers. Its basic description of noise and photodetection bridges the gap between generic knowledge and basic formulas on the one hand, andfirst-principle analysis on the other. In addition, the book outlines several new frontiers of knowledge, including modeling, inhomogeneous broadening, and nonlinear photon statistics.
Tags: erbium doped fiber amplifiers principles and applications
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