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 6 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.
The power signal-to- noise ratio S/N at the output of an optical receiver is defined
by S _ signal power from photocurrent TV photodetector noise power + amplifier
noise power The noise sources in the receiver arise from the photodetector ...
9.2.2 Photodetector and Preamplifier Noises The expressions for the photodiode
and preamplifier noises are given by Eqs. (6-16) and (6-17), respectively. That is,
for the photodiode noise we have (i2N) = a2, « 2q(Ip + ID)M2F(M)B (9-5) Here, ...
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Overview of Optical Fiber Communications
Structures Waveguiding and Fabrication
Signal Degradation in Optical Fibers
12 other sections not shown