Optical Fiber CommunicationsThe 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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Page 102
... bias current level . Possible methods for achieving this automatically are optical feedback schemes , 31,34 temperature - matching transis- tors , 35 and threshold - sensing circuits . 36 Optical feedback can be carried out by using a ...
... bias current level . Possible methods for achieving this automatically are optical feedback schemes , 31,34 temperature - matching transis- tors , 35 and threshold - sensing circuits . 36 Optical feedback can be carried out by using a ...
Page 103
... Bias output Ig + -5.2 V 752 C1 300 μF R3 352 5.2 V Back mirror light from laser Figure 4-16 Example of a bias circuit that provides feedback stabilization of laser output power . ( Reproduced with permission from Shumate , Chen , and ...
... Bias output Ig + -5.2 V 752 C1 300 μF R3 352 5.2 V Back mirror light from laser Figure 4-16 Example of a bias circuit that provides feedback stabilization of laser output power . ( Reproduced with permission from Shumate , Chen , and ...
Page 198
... bias resistor R. Ra Since the amplifier input resistance is very large , the input current noise spectral density S ,, which is the Johnson ( thermal ) noise of this resistance , ( 7-76 ) SI , FET = 4kBT Ra is negligible . Thus the ...
... bias resistor R. Ra Since the amplifier input resistance is very large , the input current noise spectral density S ,, which is the Johnson ( thermal ) noise of this resistance , ( 7-76 ) SI , FET = 4kBT Ra is negligible . Thus the ...
Contents
Structures and Waveguiding | 12 |
Signal Degradation in Optical Fibers | 48 |
Optical Sources | 80 |
Copyright | |
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absorption amplifier angle Appl attenuation avalanche photodiode band gap bandwidth Bell Sys bias cable carrier Chap cladding coefficient communication systems components connector coupler coupling coupling loss data rate dB/km decibels density detector device distortion electric electromagnetic emission emitting energy equation fiber core fiber end fiber optic Figure frequency function given by Eq glass fibers graded-index fiber IEEE Trans input laser diodes layer Lett lifetime light source loss material dispersion measured method modal modulation multimode fibers n₁ n₂ numerical aperture operating optical output optical power optical signal optical source optical waveguide output power parameter percent photodetector photon pin photodiode preform propagation quantum efficiency radiation radius ratio receiver recombination refractive index refractive-index refractive-index profile semiconductor shown in Fig silica single-mode spectral width splice star coupler step-index fiber surface T-coupler technique temperature thermal noise transmitter values voltage wave wavelength