Optical communication system using wavelength-division multiplexed light

摘要

An optical wavelength selector is provided that selects WDM channels from WDM optical signal and outputs each WDM channels from a plurality of ports. WDM optical signal in which mxn WDM channels are multiplexed is divided into n WDM channel groups and outputted by means of one wavelength-division demultiplexer. One WDM channel group is selected from the n WDM channel groups by means of n optical gate switches. The selected WDM optical signal is then separated into m WDM channels by wavelength and outputted by means of an optical wavelength router. As a result, m WDM channels of a specific WDM channel group can be received by m optical receivers.