提出并验证了一种借助于光纤环的选频特性实现辅助滤波的光电振荡器,利用偏振分束器(PBS)和偏振合束器(PBC)构成的双环路结构抑制掉部分光电振荡器的边模,同时借助于光纤环的光学梳状频率特性,对振荡器环路中的光信号模式再次进行选择,既起到边模抑制的作用,又提高了光电振荡器谐振腔的Q值。仿真结果表明:采用光纤环辅助滤波有利于光电振荡器的边摸抑制和单模输出,在保证光电振荡器输出低相位噪声和高频谱纯度微波信号的情况下,边模抑制比超过160dB,模式间隔达到370MHz,降低了对电域带通滤波器的性能要求,是一种新的光电振荡器设计方案。 An optoelectronic oscillator with auxiliary filter by selecting the frequency-selective characteristic of the fiber ring was proposed and validated. The double-loop structure consisting of a PBS and a PBC was used to suppress the loss of some of the optoelectronic oscillators At the same time, by means of the optical comb-like frequency characteristic of the optical fiber ring, the optical signal mode in the oscillator loop is selected again, which not only plays the role of side mode suppression but also improves the Q value of the optical oscillator resonator. The simulation results show that the fiber-optic loop auxiliary filter is beneficial to the edge-mode suppression and single-mode output of the opto-electronic oscillator. The side mode suppression ratio is more than 160dB while the opto-oscillator output low phase noise and high spectral purity microwave signal are guaranteed. 370MHz intervals, reducing the performance requirements of the band-pass filter, is a new design of optical oscillator.