Optical Fiber Communications
The third edition of this popular text and reference book presents the fundamental principles for understanding and applying optical fiber technology to sophisticated modern telecommunication systems.
Optical-fiber-based telecommunication networks have become a major information-transmission-system, with high capacity links encircling the globe in both terrestrial and undersea installations. Numerous passive and active optical devices within these links perform complex transmission and networking functions in the optical domain, such as signal amplification, restoration, routing, and switching. Along with the need to understand the functions of these devices comes the necessity to measure both component and network performance, and to model and stimulate the complex behavior of reliable high-capacity networks.
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CHAPTER PHOTODETECTORS At the output end of an optical transmission line
, there must be a receiving device which interprets the information contained in
the optical signal . The first element of this receiver is a photodetector .
Of the semiconductor - based photodetectors , the photodiode is used almost
exclusively for fiber optic systems because of its small size ... The two types of
photodiodes used are the pin photodetector and the avalanche photodiode (
APD ) .
The photodetector must have a high quantum efficiency to generate a large
signal power . 2 . The photodetector and amplifier noises should be kept as low
as possible . From most applications , it is the noise currents which determine the
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Overview of Optical Fiber Communications
Structures Waveguiding and Fabrication
Signal Degradation in Optical Fibers
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