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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Surface-emitting LEDs are characterized by their lambertian output pattern, which
means the source is equally bright when viewed from any direction. The power
delivered at an angle 9, measured relative to a normal to the emitting surface, ...
5-3 for a symmetric source of brightness B(A,, Q,), where As and úls are the area
and solid emission angle of the source, respectively. Here, the fiber end face is
centered over the emitting surface of the source and is positioned as close to it as
Placing the LED close to the lens surface thus results in a magnification M of the
emitting area. This is given by the ratio of the cross-sectional area of the lens to
that of the emitting area: Using Eq. (5-4) we can show that, with the lens, the ...
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Overview of Optical Fiber Communications
Structures Waveguiding and Fabrication
Signal Degradation in Optical Fibers
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