飞秒激光器脉冲重复频率的锁定技术研究

摘要

介绍了光纤飞秒激光器脉冲重复频率锁定技术的应用背景及其原理，并设计了一套可快速实现重频锁定的实验装置，最终将激光器的脉冲重复频率锁定到铷原子钟上，使飞秒激光器的脉冲重复频率获得和原子钟同样的稳定度；通过计数器采集锁定后激光器的脉冲重复频率数据，使用Allan方差给出了稳定度评价，对激光器脉冲重复频率锁定前后的稳定度进行了对比。实验证明，自主设计的实验装置可以实现锁定功能，具有很好的实用价值。%The background and principle of frep locking system of fiber femtosecond laser are introduced in this paper. An experiment setup is designed to realize quick locking of frep , and it finally locks the repetition rate to a radio frequency, which is referred to an atomic clock. Then, the stability of repetition rate is the same as atomic lock. A frequency counter is used to collect the data of repetition rate of this Fiber Femtosec-ond Laser which is locked to the atomic clock. With the data collected, we can use Allan deviation to evaluate the stability of frep of this laser. The comparison of stability of frep between the locked laser and the unlocked is shown. The experiment proved that the setup designed independ-ently can realize the function of locking, and have a high practical value.