Patent ID: 6178021
Filing Date: 2001-01-23
Classification: G02B,H04B,H04J

Abstract:
A system for compensating polarization dispersion of channels in a wavelength-division multiplex signal, the system comprising a plurality of cascaded polarization control modules respectively associated with said channels and a differential delay generator delivering a compensated multiplex signal, wherein each module comprises:a drop and insert multiplexer having a first input for receiving a multiplex input signal, a first output for an associated channel signal extracted from said multiplex input signal, a second input for inserting a modified channel signal and a second output for delivering a modified multiplex output signal, anda polarization controller adapted to receive said extracted channel signal and to deliver said modified channel signal,and wherein the system further comprises a control loop for controlling the polarization controllers in response to respective optical properties of the channel signals of said compensated multiplex signal.