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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Figure 10 - 11 shows a generic 4 x 4 fused - fiber star coupler . In an ideal star
coupler , the optical power from any input is evenly divided among the output
ports . The total loss of the device consists of its splitting loss plus the excess loss
0 - - an , Gain Noise figure ( dB ) Counterpumped noise figure Gain ( dB )
Copumped noise figure - 28 - 24 - 8 - 4 - 20 - 16 - 12 Input power ( dBm ) FIGURE
11 - 10 Measured EDFA noise figure under gain saturation for codirectional
00 nm ST 50 msec FIGURE 13 - 24 Spectrum of a Fabry - Perot laser as recorded
by an HP - 71450 optical spectrum analyzer . The display shows measurement
parameters such as spectral FWHM , center wavelength , mode spacing , and ...
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Overview of Optical Fiber Communications
Structures Waveguiding and Fabrication
Signal Degradation in Optical Fibers
13 other sections not shown