Method and system for wavelength division multiplex optical signal combining

摘要

A selective WDM add-channel system and method for adding channels to a WDM (wavelength division multiplexed) signal input to produce a WDM signal output while protecting against signal collisions are provided. The method protects against signal collisions by determining channel wavelengths of add-channel signals and at least one of the WDM signal input and the WDM signal output to ensure that channels that are added to the WDM signal input have different channel wavelength than each other and the channels that are already part of the WDM signal input. The selective WDM add-channel system comprises a selective combiner and a controller and is operable to selectively combine a plurality of add-channel inputs with a WDM input signal to produce a WDM output signal based on the channel wavelengths of the add-channel input signals and at least one of the WDM input signal and the WDM output signal.