提出了一种基于自相位锁定技术提升光电振荡器稳定性的方法.通过监测光电振荡器环路中自身相位的变化来反馈控制光可调延迟线, 提升光电振荡器输出频率稳定性.采用噪声模型进行了理论分析, 并进行了实验验证.结果表明, 带有反馈控制回路的自相位锁定光电振荡器在4 000 s内的频率漂移量小于0.9 ppm, 其稳定性较自由运行的光电振荡器有了大幅度的提升.

A method is proposed for improving the stability of an Optoelectronic Oscillator (OEO) based on self-phase-locked technique. The output frequency stability of the OEO is improved by controlling an Optical Tunalble Delay Line (OTDL) according to the phase change of the OEO loop. The principle and noise transfer model are analyzed theoretically and verified experimentally. The experimental results show that the self-phase-locked OEO with a feedback control loop has a frequency drift within 0.9 ppm in 4 000 s, and its stability is greatly improved.