Wu Haitao, Li Zhaolong, Gui Sibo, Shi Meng, Zhao Jianye
Opt Lett. 2024 Oct 1;49(19):5344-5347. doi: 10.1364/OL.532118.
A method to improve the frequency stability of microwave frequency comb (MFC) signals generated by an actively mode-locked optoelectronic oscillator (AML-OEO) is proposed and experimentally demonstrated. In the experiment, fundamental mode locking in the constructed AML-OEO is achieved, producing MFC signals with a center frequency of 2.165 GHz and a repetition rate of 396.629 kHz. By locking the MFC comb tooth to a stable reference source using a phase-locked loop (PLL), the stability of MFC's center comb tooth reaches 2.4 × 10@1000s and the frequency stability improves by more than two orders of magnitude on a second-level time scale compared to the free-running AML-OEO. The improved frequency stability of MFC signals makes AML-OEO suitable as high-performance microwave sources for various critical applications.
提出并通过实验证明了一种提高主动锁模光电振荡器（AML-OEO）产生的微波频率梳（MFC）信号频率稳定性的方法。在实验中，在构建的AML-OEO中实现了基模锁定，产生了中心频率为2.165 GHz、重复率为396.629 kHz的MFC信号。通过使用锁相环（PLL）将MFC梳齿锁定到稳定的参考源，MFC中心梳齿的稳定性达到2.4×10@1000s，并且在二级时间尺度上，与自由运行的AML-OEO相比，频率稳定性提高了两个多数量级。MFC信号频率稳定性的提高使得AML-OEO适合作为各种关键应用的高性能微波源。
