发明授权
- 专利标题: Optical communications module
- 专利标题(中): 光通信模块
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申请号: US395471申请日: 1995-02-28
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公开(公告)号: US5677779A公开(公告)日: 1997-10-14
- 发明人: Gan Oda , Tomohisa Ishikawa , Yoshimitsu Sakai , Akira Okamoto , Tatsuro Kunikane , Tetsuo Watanabe , Sadayuki Miyata , Hiroyuki Furukawa
- 申请人: Gan Oda , Tomohisa Ishikawa , Yoshimitsu Sakai , Akira Okamoto , Tatsuro Kunikane , Tetsuo Watanabe , Sadayuki Miyata , Hiroyuki Furukawa
- 申请人地址: JPX Kawasaki
- 专利权人: Fujitsu Limited
- 当前专利权人: Fujitsu Limited
- 当前专利权人地址: JPX Kawasaki
- 优先权: JPX6-150964 19940701
- 主分类号: G02B6/42
- IPC分类号: G02B6/42 ; H01S5/042 ; H04B10/077 ; H04B10/079 ; H04B10/2507 ; H04B10/272 ; H04B10/293 ; H04B10/40 ; H04B10/50 ; H04B10/516 ; H04B10/564 ; H04B10/572 ; H04B10/60 ; H04B10/67 ; H04B10/69 ; H04B10/00
摘要:
A compact, low-cost combined transmitting/receiving optical communications module, which is suitable for use in a TCM system and which is capable of normal operation over a particularly wide temperature range in optical communications equipment, is provided. The optical transmitting/receiving section for this purpose has a laser diode which outputs a transmitted optical signal, a combined monitor/receiving photodiode which not only monitors the optical output signal from the laser diode during a transmitting period, but also receives the input optical signal from the transmission path during the receiving period, and an optical mixer/divider which performs transmitting/receiving mixing and dividing between the transmission path, the laser diode, and the photodiode. A drive section has a transmitting/receiving switching circuit which performs time-division transmitting/receiving switching and a threshold control circuit which performs successive control of the bias current of the laser diode so that the optical noise output monitored by the photodiode is maximized.
公开/授权文献
- USD313860S Extruded master frame window jamb 公开/授权日:1991-01-15