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1. 发明授权

US4287606A Fiber optic transmission line stabilization apparatus and method 失效
标题翻译：光纤传输线稳定装置及方法
公开(公告)号：US4287606A
公开(公告)日：1981-09-01
申请号：US188160
申请日：1980-09-17
申请人： Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch , George F. Lutes, Jr. , Kam Y. Lau
发明人： Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch , George F. Lutes, Jr. , Kam Y. Lau
IPC分类号： H04B10/152 , H04B9/00
CPC分类号： H04B10/548
摘要： A fiber optic transmission line stabilizer for providing a phase-stabilized signal at a receiving end of a fiber optic transmission line (26) with respect to a reference signal at a transmitting end of the fiber optic transmission line (26) so that the phase-stabilized signal will have a predetermined phase relationship with respect to the reference signal regardless of changes in the length or dispersion characteristics of the line (26). More particularly, a reference signal of RF frequency modulates a 0.85 micrometer wavelength optical transmitter (20). The output of the optical transmitter (20) passes through a first optical filter (24) and a voltage-controller phase shifter (22), the output of the phase shifter (22) being provided to the fiber optic transmission line (26). At the receiving end of the fiber optic transmission line (26), the signal is demodulated, the demodulated signal being utilized to modulate a 1.06 micrometer optical transmitter (34). The output signal from the 1.06 micrometer optical transmitter (34) is provided to the same fiber optic transmission line (26) and passes through the voltage-controlled phase shifter (22) to a phase error detector (36). The phase of the modulation of the 1.06 micrometer wavelength signal is compared to the phase of the reference signal by the phase error detector (36), the detector (36) providing a phase control signal related to the phase difference. This control signal is provided to the voltage controlled phase shifter (22) which alters the phase of both optical signals passing therethrough until a predetermined phase relationship between modulation on the 1.06 micrometer signal and the reference signal is obtained.
摘要翻译：一种光纤传输线路稳定器，用于在光纤传输线（26）的发射端处的参考信号处在光纤传输线（26）的接收端处提供相位稳定的信号，稳定的信号将相对于参考信号具有预定的相位关系，而不管线（26）的长度或色散特性的变化。更具体地，RF频率的参考信号调制0.85微米波长的光发送器（20）。光发射器（20）的输出通过第一滤光器（24）和电压控制器移相器（22），移相器（22）的输出被提供给光纤传输线（26）。在光纤传输线（26）的接收端，解调信号，解调信号用于调制1.06微米的光发送器（34）。来自1.06微米光发射机（34）的输出信号被提供给相同的光纤传输线（26），并通过压控移相器（22）传送到相位误差检测器（36）。通过相位误差检测器（36）将1.06微米波长信号的调制相位与参考信号的相位进行比较，检测器（36）提供与相位差相关的相位控制信号。该控制信号被提供给电压控制移相器（22），其改变通过其中的两个光信号的相位，直到获得1.06微米信号上的调制与参考信号之间的预定相位关系。

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