发明名称 OPTICAL COMMUNICATION METHOD AND ITS SYSTEM
摘要 PROBLEM TO BE SOLVED: To provide an optical communication system that can surely detect a fault so as to sufficiently take into account the safety on a human body. SOLUTION: A monitor signal outputted from an SV 23 of a relay station 20 is multiplexed on an optical transmission line 11, a WDM filter provided on the optical transmission line 11 between the relay station 20 and a WDM 12 applies wavelength division on the monitor signal from the optical signal, the SV 23 discriminates a fault when no monitor signal flowing via a loop comprising the branching optical transmission line interconnecting the optical transmission lines 11 and 10 exists, and optical amplification of the optical signal by a pump-LD 22e is stopped.
申请公布号 JP2003046457(A) 申请公布日期 2003.02.14
申请号 JP20010232232 申请日期 2001.07.31
申请人 FURUKAWA ELECTRIC CO LTD:THE 发明人 KOSUGE TATSUYA;IWASHITA TAKAHIKO
分类号 H01S3/00;H04B10/00;H04B10/03;H04B10/07;H04B10/071;H04B10/077;H04B10/079;H04B10/29;H04B10/294;H04B10/297;H04B17/00;H04J14/00;H04J14/02 主分类号 H01S3/00
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