Wavelength division multiplexing optical transmission system and wavelength division multiplexing optical transmission method

摘要

At a transmission section, different frequencies ranging from f1 to fn corresponding to n channels are generated as channel information, respectively. The signal light ( lambda 1 to lambda n) of each channel is modulated at the corresponding frequency (f1 to fn) and multiplexed. At a reception section, in case of selecting the channel of the signal light lambda 1, the wavelength selection characteristic of a filter is sweep controlled for detecting the frequency f1. The wavelength selection characteristic at the f1 detection is kept as the wavelength selection characteristic of the filter.