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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+P,d FIGURE 10-3 Basic star coupler concept for combining or splitting optical
powers. cores of the N output fibers through evanescent power coupling in the
fused region. Any size star coupler can be made, in principle, provided that all
2x2 coupler is a directional coupler. That is, no energy can be coupled into a
wave traveling backward in the negative-z direction in the driven waveguide.
Figure 10-56 shows how k varies with wavelength for the final 15-mm-long
The output powers are then given by P out.l = ^out.l^utj — 5^,1 = J A) Similarly, ^
out.2 = ^out.2^ut,2 = 2^in,l = 5^*0 so that half the input power appears at each
output of the coupler. It is also important to note that when we want a large
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Overview of Optical Fiber Communications
Structures Waveguiding and Fabrication
Signal Degradation in Optical Fibers
12 other sections not shown