发明名称 |
Fiber-Optic Automatic Gain Control Systems and Methods |
摘要 |
Methods and systems to control a gain applied to a free-space optical (FSO) signal to reduce time-varying intensity fluctuations. An optical pre-amplifier may provide a first, relatively moderate gain with low noise factor (NF). A second optical amplifier may provide a second gain. Amplification may include doped fiber amplification (DFA), such as erbium-doped fiber amplification (EDFA) and/or Raman amplification. A variable optical attenuator (VOA) may be controllable with a relatively fast response time to reduce the time-varying intensity fluctuations. The VOA may effectively control an overall system gain. The gain of the first and/or second optical amplifier may also be controllable to reduce the time-varying intensity fluctuations. Optical intensities may be detected at one or more locations to support one or more feed-forward and/or feedback control loops. A clamp may be applied when an optical power reaches a threshold.
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申请公布号 |
US2013004181(A1) |
申请公布日期 |
2013.01.03 |
申请号 |
US201113173155 |
申请日期 |
2011.06.30 |
申请人 |
JUAREZ JUAN C.;YOUNG DAVID W.;SLUZ JOSEPH E. |
发明人 |
JUAREZ JUAN C.;YOUNG DAVID W.;SLUZ JOSEPH E. |
分类号 |
G02F2/00 |
主分类号 |
G02F2/00 |
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