双光梳重复频率差异步锁定技术研究  

Research on repetition rate difference asynchronous locking technique of dual-comb

作　　者：容驷驹 陈新度[2] 孙敬华 梅领亮 柏汉泽 何鹏 练彬 Rong Siju;Chen Xindu;Sun Jinghua;Mei Lingliang;Bai Hanze;He Peng;Lian Bin(School of Electrical Engineering and Intelligentization,Dongguan University of Technology,Dongguan 523808,China;School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China;Dongguan Sanhang Civil-Military Integration Innovation Institute,Dongguan 523808,China)

机构地区：[1]东莞理工学院电子工程与智能化学院,广东东莞523808 [2]广东工业大学机电工程学院,广东广州510006 [3]东莞市三航军民融合创新研究院,广东东莞523808

出　　处：《红外与激光工程》2022年第11期240-247,共8页Infrared and Laser Engineering

基　　金：广东省基础与应用基础研究基金区域联合基金重点项目(2020B1515120041);广东省重点领域研发计划项目(2020B010190001);2019年广东省科技创新战略专项资金(2019B090904007)。

摘　　要：双光梳系统在高精度绝对距离测量、三维成像以及光谱测量等领域有着其独特的优势和广阔的发展前景。文中提出一种基于锁相环原理的异步锁定技术,可以对双光梳系统中的重复频率差进行精密锁定。实验中,采用了重复频率约为155.711 MHz和155.714 MHz的双光梳系统,通过反馈控制压电陶瓷(PZT)驱动电压从而控制激光器谐振腔腔长来实现重复频率差的锁定,并利用频率计数器采集锁定后双光梳重复频率差的数据,使用Allan方差和标准差作为频率稳定度的评价指标。最终在1 s的平均时间内,得到重复频率差的Allan偏差为1.8×10^(−13),抖动标准差为40.689μHz。结果表明,该技术可以对双光梳系统的重复频率差进行灵活调整,并具有锁定精度高、抗扰能力强等优点。The dual-comb system has its unique advantages and broad development prospects in the fields of high precision absolute distance measurement,3-D imaging and spectral measurement.In this paper,an asynchronous locking technique based on phase-locked loop principle was proposed,which can precisely lock the repetition rate difference in dual-comb system.In the experiment,a dual-comb system with a repetition rate of about 155.711 MHz and 155.714 MHz was adopted.By controlling the driving voltage of PZTs through feedback,the length of the laser resonator was controlled to achieve the locking of the repetition rate difference,and the frequency counter was used to collect the data of the repetition rate difference after locking.Allan deviation and standard deviation were used as evaluation indexes of frequency stability.Finally,within the average time of 1 s,the Allan deviation of repetition rate difference was 1.8×10^(−13),and the jittering standard deviation was 40.689μHz.The results show that this technology can adjust the repetition rate difference flexibly,and has the advantages of high locking accuracy and strong disturbance rejection.

关 键 词：双光梳 重复频率差锁定 异步锁定技术 锁相环 频率稳定度 

分 类 号：TN248[电子电信—物理电子学]