发明申请
- 专利标题: ATTENUATION SYSTEMS AND METHODS FOR USE WITH AN OPTICAL DETECTOR IN AN OPTICAL COMMUNICATION SYSTEM
- 专利标题(中): 在光通信系统中使用光学检测器的衰减系统和方法
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申请号: US12255507申请日: 2008-10-21
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公开(公告)号: US20090041477A1公开(公告)日: 2009-02-12
- 发明人: James J. Alwan , Paul William Binun , Scott Harris Bloom , Victor J. Chan , Glenn Claude Hoiseth , Hugh Michael O'Brien, IV , Scott Platenberg , Werner Pyka , Raymond D. Rogers
- 申请人: James J. Alwan , Paul William Binun , Scott Harris Bloom , Victor J. Chan , Glenn Claude Hoiseth , Hugh Michael O'Brien, IV , Scott Platenberg , Werner Pyka , Raymond D. Rogers
- 主分类号: H04B10/04
- IPC分类号: H04B10/04
摘要:
Systems and methods for use with an optical communication beam are disclosed. The system allows the beam of light to operate at an adequate power level that provides a robust optical link while minimizing any safety risk to humans. The system calibrates and controls the gain for an avalanche photodiode detector (APD). A detector circuit is used to calibrate the APD. Once calibrated, the detector circuit further provides an electrical bias to the APD to process or condition the electrical signal to produce a detector output. The systems and methods disclosed herein attenuate the power level of an incoming communication beam to prevent oversaturation of an APD. The system further provides an alignment signal, which is effective over a wide dynamic range of incoming power levels.