OPTICAL SIGNAL QUALITY MONITOR

摘要

An optical signal quality monitor for simply monitoring the quality of an optical signal with high efficiency and accuracy without inviting increase in manufacturing cost, circuit scale, and power consumption. The bit rate of a monitoring signal light beam is lower than that of a main signal light beam transmitted in an optical communication system. The reception electric bandwidth of a receiver for receiving the monitoring signal light beam is equal to or wider than that of a receiver for receiving the main signal light beam. The monitoring signal light beam includes an SOH (Section Over Head) frame. Any error in the BIP (Bit Interleaved Parity) bytes of the SOH is detected. Thus, the quality of an optical communication system, especially a light-wave network is monitored.