Long-Term Frequency Stabilization of an Optoelectronic Oscillator Using Phase-Locked Loop
Long-Term Frequency Stabilization of an Optoelectronic Oscillator Using Phase-Locked Loop
复制标题
使用锁相环的光电振荡器的长期频率稳定
DOI：
10.1109/jlt.2014.2326154
复制
发表时间：
2014-07-01
影响因子：
4.7
通讯作者：
Zhao, Jianye
中科院分区：
文献类型：
--
作者：
Zhang, Yaolin;Hou, Dong;Zhao, Jianye
我们演示了一种具有锁相环 (PLL) 的单环光电振荡器 (OEO) 的长期频率稳定方法。 OEO 通过带有 PID 调节器的 PLL 电路频率锁定到高度稳定的微波参考。通过这种方法，我们获得了高度稳定的3.035 GHz微波信号，在10 Hz偏移频率下相位噪声为-65 dBC/Hz，平均1000 s时频率稳定度达到6.98 × 10-14。这些实验结果表明，PLL锁定OEO在低偏移频率下的长期频率稳定性和相位噪声性能方面都有很大改善。因此，PLL 锁定 OEO 可以成为微波光子学应用中高度稳定、低相位噪声微波发生器的有力候选者。
We demonstrate an approach of long-term frequency stabilization of a single-loop optoelectronic oscillator (OEO) with a phase-locked loop (PLL). The OEO is frequency locked to a highly stable microwave reference via a PLL circuit with a PID regulator. With this approach, we obtained a highly stable 3.035-GHz microwave signal with phase noise of -65 dBC/Hz at 10-Hz offset frequency, and the frequency stability has reached 6.98 × 10-14 at average time of 1000 s. These experimental results show that the PLL-locked OEO is greatly improved in both long-term frequency stability and phase noise performance at low offset frequencies. Therefore, the PLL-locked OEO can be a strong candidate of highly stable, low phase noise microwave generators for microwave photonics applications.