基于FLOM-PD的集成化光频梳重频锁定技术

Integrated optical frequency comb repetition rate locking technology based on FLOM-PD

为了将光频梳锁定至原子钟以实现光频梳的高精度稳定,提出了一种集成化重复频率锁定系统方案。利用光纤环路光学-微波鉴相器(FLOM-PD)进行光波和微波之间的直接鉴频鉴相。同时,开发了精密反馈控制模块,阐述了其基本原理,搭建了锁定系统,通过高精度频率计采集锁定后激光器脉冲重复频率数据。实验结果表明:该方案锁定后频率短期稳定度和长期稳定度分别达到8.71×10-12/s、4.95×10-14/1024 s,实现了整个系统的集成化。

In order to lock the optical frequency comb to the atomic clock to achieve high precision and stability of the optical frequency comb,an integrated repetition rate locking system is proposed.Fiber loop optical microwave-phase detector(FLOM-PD)is used for direct frequency and phase discrimination between light wave and microwave.At the same time,the precise feedback control module is developed,its basic principle is described,and the locking system is built.The laser pulse repetition rate data after locking is collected by high-precision frequency meter.The experiment results show that the short-term stability and long-term stability of the system can reach 8.71×10-12/s and 4.95×10-14/1024 s respectively,which realizes the integration of the whole system.