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 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|