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对被动式谐振腔光纤陀螺进行双光路频率调制是降低瑞利背向散射最简便、效果最好的方法，且可以提高系统精度，改善开、闭环控制效果．文中简述了对陀螺信号进行调制的两种基本方法，即对谐振腔体进行调制和对入射光频率进行调制，得出后者在性能上的优势．采用洛仑兹公式描述光纤陀螺的传递函数，结合输入信号特征，建立其频域的数学模型，并给出了计算结果和相关图形，以及一些关键参数的优化值．且对全光路的结构提出了具体的配置建议
The dual optical frequency modulation of passive resonator fiber optic gyroscope is the easiest and most effective way to reduce Rayleigh backscatter, and can improve the system accuracy and improve the effect of open and closed loop control. In this paper, two basic methods to modulate the gyroscope signal are briefly described. That is, the resonant cavity is modulated and the frequency of incident light is modulated, and the latter advantage in performance is obtained. The Lorenz formula is used to describe the transfer function of the FOG. The mathematical model of the FOG is established based on the characteristics of the input signal. The calculation results and related graphs are given, and the optimization values of some key parameters are given. And put forward the concrete configuration suggestion to the structure of all light path