1. Linear sources of distortion
Despite the many advances made by manufacturers since the invention of fiber, the propagation of a signal in an optical telecommunication cable is accompanied by distortions that must be compensated for as far as possible. These distortions can be caused by either linear or non-linear physical phenomena. Unlike linear physical phenomena, non-linear physical phenomena produce the same level of distortion whatever the optical power level of the propagating signal.
1.1 Amplifier noise
The small perturbations in signal amplitude and phase caused by the passage of optical amplifiers, known generically as amplified spontaneous emission noise, are the most common linear distortions encountered in even the simplest systems. As soon as the transmitted optical signal is...
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Linear sources of distortion
Fiber types
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