发明授权
- 专利标题: Optical link with reduced four-wave mixing
- 专利标题(中): 光链路减少四波混频
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申请号: US09215844申请日: 1998-12-18
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公开(公告)号: US06650842B1公开(公告)日: 2003-11-18
- 发明人: John A. Fee , Frank A. McKiel, Jr.
- 申请人: John A. Fee , Frank A. McKiel, Jr.
- 主分类号: H04B1000
- IPC分类号: H04B1000
摘要:
An optical communication system and method of use thereof which uses dispersion compensators to intentionally create a dispersive condition at the output of subsequent inline optical amplifiers. The present invention reduces four-wave mixing and increases the allowable spacing between optical amplifiers, thus reducing the required number of amplifiers and dispersion compensators for a given length of optical fiber. In one embodiment, dispersion compensators and optical amplifiers are alternately spaced from one another along a length of an optical fiber such that the dispersion compensators render a dispersive condition at the amplifiers allowing each amplifier to be run at a higher power level. In another embodiment, the dispersion compensator is collocated with the amplifier, but is positioned between a pre-amp stage and a high power output stage to overcompensate both the slope and absolute dispersion of the fiber up to that point. The dispersion compensator provides a dispersive condition at the output of the output stage allowing the amplifier to be operated at a higher power level without creating four-wave mixing. In yet another embodiment of the invention, an additional dispersion compensator is provided at the output of a transmitter to overcompensate both the slope and absolute dispersion of the fiber to render a substantially neutral dispersion signal upon arrival at the next optical line element or receiver.
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