METHOD AND APPARATUS FOR DETECTION AND COMPENSATION OF PMD PARAMETERS IN SIGNALS TRANSMITTED OVER OPTICAL FIBER LINKS AND SYSTEM OF COMMUNICATION THEREWITH

摘要

A kind of optical fiber link (12) of detection PMD instruction parameters includes at least one transmission channel, wherein being included the subband divided in B frequency bands by one first broadband optical signal of transmission and the step of B frequency bands. Each subband generates one second reference optical signal (2) and finds that swage optical signal is overlapped the s1 and s2 of (s3) with which. The parameter considered first is calculated for each third signal indicates that the second parameter of the first parameter of PMD and its all sub-bands indicates to calculate the first wiedband signals for considering PMD. The above method can be used as a part of PMD compensation methodes and be suitable for the PMD compensator (14) that feedback drives using its transmission system parameter. Detection device is according to including generator (18), for generating the second reference optical signal, optical mixer (19), for generating the electric beat signal of one or more photodetectors discovery or signal s1 and s2 that are superimposed the first and second signals, the work (23) that the first computing device (21) calculates the first parameter and second device is used to handle all first parameters therefrom (24) will be further processed to find the such of the second parameter. The detection device can be part compensation device and include compensator (14) and calculate grade (16) for calculating compensation and to compensator. It entirely can be a part of optical fiber telecommunications system.