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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Normal line N2 < ni Refracted гау Material boundary 101 Reflected ray Incident
ray FIGURE 2 - 6 Refraction and reflection of a light ray at a material boundary .
or , equivalently , as nicos 01 = n2 cos 02 ( 2 - 17 ) where the angles are defined
( 5 - 10 ) ni tn ) where R is the Fresnel reflection or the reflectivity at the fiber -
core end face . The ratio r = ( nı – n ) / ( nı + n ) , which is known as the reflection
coefficient , relates the amplitude of the reflected wave to the amplitude of the
Reflecti Optical transmitter Optical receiver Successively reflected signals ( a )
Main pulse Receiver input Attenuated and delayed reflections 3 Time Roundtrip
time between reflection points ( 6 ) FIGURE 8 - 19 ( a ) Two refractive - index ...
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Overview of Optical Fiber Communications
Structures Waveguiding and Fabrication
Signal Degradation in Optical Fibers
13 other sections not shown