VERFAHREN UND VORRICHTUNG ZUM NIVEAUAUSGLEICH DER LEISTUNG DER KANÄLE EINES SPEKTRAL GEMULTIPLEXTEN OPTISCHEN SIGNALS

摘要

The method involves use of an optical equalisation module (4) including an attenuator (5) adjusted by a monitor (6) which comprises a tunable photo-refractive filter (19) and a photodetector (21) with management logic (20). The attenuator has a convertor (17) which controls tunable photo-refractive filters (16a-16n) for different channels. The attenuator is followed by an Er-doped fibre amplifier (3) with multiplexers (10,11) of pumping waves from laser diodes (8,9) supplied with controlled currents from a regulator (12) in response to the level measured by a photodiode (13).