全保偏飞秒光纤激光器异步锁定技术研究  

Study on asynchronous locking technology of femtosecond fiber laser with full deflection maintaining

作　　者：汤成 郝强[1] 刘峥 TANG Cheng;HAO Qiang;LIU Zheng(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学仪器》2024年第1期1-7,共7页Optical Instruments

基　　金：国家重大科研仪器研制项目(11727812)。

摘　　要：基于全保偏掺铒光纤激光器、锁相环系统和太赫兹测距光路搭建了一套太赫兹双光梳测距系统。所采用的全保偏掺铒光纤激光器重复频率为79.261 MHz。利用压电陶瓷(piezoelectric ceramics,PZT)和步进电机(stepper motor,SM)双级反馈控制的方案,实现了重复频率锁定和重复频率1.54 MHz可调。使用频率计数器对双光梳重复频率锁定效果进行监测,重复频率锁定的峰峰值抖动为±1.5 mHz,抖动标准差为0.4 mHz。将双光梳重频差设置在10 Hz,10 min内重复频率差最大抖动为3 mHz,标准差为0.6 mHz。进一步将异步采样双光梳系统应用于太赫兹测距,测量移动距离的误差为3µm。该系统具有锁定精度高,稳定性强等优势,有望应用于生物无损检测和工业精密加工中。In this paper,a terahertz dual-comb ranging system is constructed based on a fully biasmaintaining erbium-doped fiber laser,phase-locked loop system and terahertz ranging optical path.In the experiment,the full bias-maintaining erbium-doped fiber laser had a repetition frequency of 79.261 MHz,and the repetition frequency was locked and the frequency was adjustable at 1.54 MHz by piezoelectric ceramic(PZT)and stepper motor(SM)dual-stage feedback control scheme.The peak-peak jitter and standard deviation of jitter were±1.5 mHz and 0.4 mHz respectively.The repetition frequency difference of the dual-comb was set at 10 Hz,and the maximum jitter and standard deviation of repetition frequency difference within 10 min were calculated to be 3 mHz and 0.6 mHz.Furthermore,the asynchronous sampling dual-comb system was applied to the terahertz ranging,and the error of measuring the moving distance was 3µm.The system has the advantages of high locking precision and strong stability,and is expected to be used in biological nondestructive testing and industrial precision machining.

关 键 词：双光梳 掺铒光纤激光器 锁相环 重复频率锁定 

分 类 号：TN249[电子电信—物理电子学]