It is found infeasible to overcome the polarization-induced fading influence on output signal through AGC circuit which uses peak or peak-peak signal of interferometric detection method to control the gain of AGC circuit.

• 提出了不能通过干涉信号的峰值或峰峰值检测来控制自动增益控制(AGC)电路增益的方法消除偏振衰落对输出信号的影响。