中文摘要：

通过构建小数分频锁相环,将一个工作于X波段的OEO（OptoElectronic Oscillator,光电振荡器）与OCXO（Oven-Controlled Crystal Oscillator,恒温晶体振荡器）进行锁相,得到了输出信号相位噪声和长期频率稳定度的提升。从PLL（Phase-Locked Loop,锁相环）环路传输特性出发,理论分析了PLL输出信号环路带宽内相位噪声水平和作用范围。为降低OEO整体的相位噪声,采用SIL（Self-Injection-Locking,自注入锁定）使OEO在10Hz~10kHz频偏处的相位噪声得到20dB以上的抑制。在此基础上将此SIL OEO与一个频率为100 MHz的OCXO锁相,获得了频率为9.95GHz、相位噪声为-55dBc/Hz@10Hz和-124dBc/Hz@10kHz的微波信号输出,其频率的重叠阿伦方差在100s平均时间内达到1.14×10~（-11）,证明了提出的方案对提升OEO频率稳定性具有一定的实际意义。

英文摘要：

In this paper, frequency stabilization of X-band OptoElectronic Oscillator （OEO） is obtained by phase loc-king to an Oven-Controlled Crystal Oscillator （OCXO） through a fractional Phase-Locked Loop （PLL） . The rela-tionship between the loop transfer characteristics of PLL and the phase noise of the oscillation is analyzed. The over-all phase noise performance of the OEO is improved by Self-Injection-Locking （SIL） approach, where the phase noise of the OEO is suppressed for over 20 dB within frequency offsets from 10 Hz to 10 kHz. SIL OEO is phase locked with a 100 MHz OCXO. The phase noise of the PLL-locked SIL OEO is - 55 dBc/Hz at 10 Hz offset and -124 dBc/Hz at 10 kHz offset and the frequency overlapping Allan DEViation （ADEV） reaches 1. 14X10-11 at an average time of 100 s, and this validates high frequency stability of the obtained output.