介绍了一种具有高稳定性、高谱纯度、低相位噪声的双环路光电振荡器(OEO)。理论上分析了光电振荡器的基本原理,采用光域双环路的方案有效地实现了边模抑制,通过检测输出信号频率的变化来控制光纤环路的长度,从而得到了高质量的20GHz微波信号,其频谱纯度高,线宽小于1Hz,相位噪声在10kHz时为-112dBc/Hz,而且在4h观测时间内,频率的稳定性小于10-10。 A dual loop optoelectronic oscillator (OEO) with high stability, high spectral purity and low phase noise is introduced. Theoretical analysis of the basic principles of the opto-electronic oscillator, the use of optical dual-loop scheme to effectively achieve the edge mode suppression, by detecting the output signal frequency to control the length of the fiber loop, resulting in high-quality 20GHz microwave signal , Its spectral purity is high, the line width is less than 1Hz, the phase noise is -112dBc / Hz at 10kHz, and the stability of the frequency is less than 10-10 in 4h observation time.