用于原子干涉仪的激光相位锁定及频率切换方法  

The method of laser phase locking and frequency switching for atomic interferometer

作　　者：孔德龙 陈玮婷 裴栋梁 王杰英 李奕泽 张子山[1,2,3] KONG Delong;CHEN Weiting;PEI Dongliang;WANG Jieying;LI Yize;ZHANG Zishan(Tianjin Navigation Instrument Research Institute,Tianjin 300131,China;Tianjin Key Laboratory of Quantum Precision Measurement Technology,Tianjin 300131,China;Laboratory of Science and Technology on Marine Navigation and Control,China State Shipbuilding Corporation,Tianjin 300131,China)

机构地区：[1]天津航海仪器研究所,天津300131 [2]天津市量子精密测量技术重点实验室,天津300131 [3]中国船舶航海保障技术实验室,天津300131

出　　处：《中国惯性技术学报》2024年第4期394-398,共5页Journal of Chinese Inertial Technology

基　　金：国家重点研发计划资助项目(2021YFB3900200)。

摘　　要：针对光锁相环参考频率在大范围跳变时,待锁激光器因频率响应速度不足引起的锁相失效的问题,在已有光锁相环基础上,提出了一种基于电压补偿的激光相位锁定及频率切换方法。首先基于光锁相环的环路特性构建了参考频率切换模型,分析了锁相拉曼光对原子干涉仪相位影响的评价方法;之后通过构建激光频率变化和压电陶瓷电压的对应关系,获取电压-频率的转换标度;最后根据实际的原子干涉仪激光频率需求,完成切换频率和补偿电压的匹配时序设计。实验结果表明当参考频率在300 MHz范围内切换时,锁相环路在0.2 ms内即可实现稳定,并在原子干涉仪上实现了干涉时间间隔为60 ms的干涉验证。所提方法为提升原子干涉仪激光系统的集成化、可靠性等提供了一种思路,有助于推动原子干涉仪的工程化研究。To solve the problem of phase-locking failure of the laser to be locked due to insufficient frequency response speed when the reference frequency of the optical phase-locked loop jumps in a wide range,a laser phase-locking and frequency-switching method based on voltage compensation is proposed on the basis of existing optical phase-locked loops.Firstly,a reference frequency switching model is constructed based on the loop characteristics of the optical phase-locking,and the evaluation method of the influence of the phase-locked Raman light on the phase of the atomic interferometer is analyzed.After that,by constructing the correspondence relationship between the laser frequency change and the piezoelectric ceramic voltage,the voltage-frequency conversion scale is obtained.Finally,according to the laser frequency demanded in the actual atomic interferometer,the switching frequency and the matching timing sequence of the compensating voltage is designed.The experimental results show that the phase-locked loop can be stabilized within 0.2 ms when the reference frequency is switched in the range of 300 MHz,and the interference with an interference time interval of 60 ms has been verified on the atomic interferometer.The proposed method provides an idea to improve the integration and reliability of the laser system in atom interferometer,which helps to promote the engineering development of the atom interferometer.

关 键 词：原子干涉 激光系统 相位锁定 电压补偿 

分 类 号：TN249[电子电信—物理电子学]