发明授权
- 专利标题: Optical transmission equipment and optical add-drop multiplexer
- 专利标题(中): 光传输设备和光分插复用器
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申请号: US11752331申请日: 2007-05-23
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公开(公告)号: US07697845B2公开(公告)日: 2010-04-13
- 发明人: Yasuhiro Uchiyama , Hiroyuki Nakano
- 申请人: Yasuhiro Uchiyama , Hiroyuki Nakano
- 申请人地址: JP
- 专利权人: Hitachi Communication Technologies, Ltd.
- 当前专利权人: Hitachi Communication Technologies, Ltd.
- 当前专利权人地址: JP
- 代理机构: Antonelli, Terry, Stout & Kraus, LLP.
- 优先权: JP2006-173915 20060623
- 主分类号: H04J14/02
- IPC分类号: H04J14/02 ; H04B10/16
摘要:
An optical add-drop function part of an optical add-drop multiplexer has an output end of transmitted light signal in which an optical termination mechanism formed by an optical detector for detecting open of an optical fiber, an optical switch, and an optical terminator are mounted. Further, a reflection level calculation circuit, a reflection warning determination circuit, and an optical switch selection circuit are mounted to perform laser safety in the optical add-drop function part as well. The laser safety part in the optical add-drop function part is operated earlier than the laser safety part in an optical amplification function part.
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