Optisches Wellenlängenmultiplex Übertragungssystem mit Wellenlängenwählern

摘要

A wavelength-multiplexing optical transmission system includes (a) an optical transmitter 100 for wavelength-multiplexing a plurality of optical signals having different wavelengths and transmitting a wavelength-multiplexed optical signal, (b) an optical fiber cable 4 for transmitting a plurality of transmitted optical signals, and (c) an optical receiver 101 for receiving a plurality of transmitted optical signals. The optical receiver 101 includes a wavelength selector 20 for demultiplexing an optical signal having a predetermined wavelength of a plurality of received optical signals and outputting the demodulated signal. The wavelength selector 20 has comb-shaped wavelength selection characteristics for selectively filtering an optical signal having a plurality of selected wavelengths. A wavelength selection interval DELTA lambda between two adjacent selected wavelengths of the wavelength selection characteristics is different from a signal wavelength interval delta lambda between two adjacent signal wavelengths of a plurality of wavelength-multiplexed optical signals. The difference therebetween is set so that substantially a single optical signal is selectively filtered from a plurality of received optical signals. The wavelength selector 20 includes a wavelength control mechanism 10 for shifting the selected wavelengths of the wavelength selection characteristics, respectively.