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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13.4.2 Time-Domain Intermodal Dispersion Measurements The simplest
approach for making pulse-dispersion measurements in the time domain is to
inject a narrow pulse of optical energy into one end of an optical fiber and detect
Two important performance parameters of an OTDR are dynamic range and
measurement range.47 Dynamic range is defined as the difference between the
initial backscatter power level and the noise level after 3 minutes of measurement
amplified SSE, are measured. Knowing these values, the gain G and the
quantum- limited noise figure NF can be calculated from the expressions G = (
Pout-PASE)/P«g (13-32) and Krc Pase . 1 ^SSE ,,, -,, NF = GJ^B-0 + G-h^B0 (13"
33) where ...
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Overview of Optical Fiber Communications
Structures Waveguiding and Fabrication
Signal Degradation in Optical Fibers
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