SUBMARINE OPTICAL REPEATER

摘要

PURPOSE:To reduce the probability in an open transmission line in viewing the entire transmission line by switching electrically plural photodetection circuits and light emission circuits or using an optical switch to switch an optical signal to set a transmission line in response to the state of transmission lines. CONSTITUTION:A signal transmitted from a station A is received by the 1st photodetection circuit 10-5 via a cable L1 (1st submarine optical cable pair), subjected to the control of a control circuit 14 through the 1st identification regenerating circuit 11-5, the 1st electric switch circuit 13-1 selects the 2nd light emission circuit 12-5 or 12-6 to transmit the signal to a station B or C. The signal from the station B or C is received by the 2nd photodetector circuit 1-6 or 10-7, selected by the 2nd electric switch circuit 13-2 and regenerated at the 2nd identification regenerating circuit 11-6, then transmitted to the station A as an optical signal by the 1st light emission circuit 12-7.