光泵磁力仪中垂直腔面发射激光器激光波长锁定  

Wavelength Locking of Vertical-Cavity Surface-Emitting Laser in Optically Pumped Magnetometer

作　　者：骆曼箬 李绍良 黄艺明 张弛 吴招才 刘华[1] LUO Manruo;LI Shaoliang;HUANG Yiming;ZHANG Chi;WU Zhaocai;LIU Hua(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Key Laboratory of Space Intelligent Control Technology,Shanghai Institute of Spaceflight Control Technology,Shanghai 201109,China;Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]上海航天控制技术研究所上海空间智能控制技术重点实验室,上海201109 [3]自然资源部第二海洋研究所,杭州310012

出　　处：《上海交通大学学报》2024年第4期438-448,共11页Journal of Shanghai Jiaotong University

基　　金：上海航天先进技术联合研究基金(USCAST2019-23);上海交通大学“深蓝计划”基金项目(SL2021ZD202);“十三五”装备预研领域基金项目(重点)。

摘　　要：针对光泵磁力仪(OPM)对小型化、低功耗以及激光光源波长稳定性的要求,提出一套垂直腔面发射激光器激光波长锁定控制方案.所提基于多普勒吸收的光反馈波长锁定方案以133 Cs原子D1线F_(g)=4→F_(e)=3超精细能级跃迁波长为参考波长,OPM的原子蒸汽气室同时作为波长锁定的工作气室,无需任何额外装置即可将激光波长锁定在该D1线跃迁波长.使用数字比例积分微分控制与模糊控制算法进行激光的温度控制,使温度波动在±0.005℃内;采用基于电流镜的激光电流驱动方案,使电流波动在±50 nA内,为激光波长锁定提供了良好的硬件基础.最后,在实验室环境下实现OPM长达2 h的稳定信号输出.Aimed at the requirements of optically pumped magnetometer(OPM)for miniaturization,low power consumption and laser frequency stability,a wavelength locking control scheme for vertical-cavity surface-emitting laser is proposed.The proposed method of laser wavelength locking based on Doppler absorption optical feedback takes the wavelength of D1 line F_(g)=4→F_(e)=3 transition in 133 Cs atom as the reference.The atom vapor cell in OPM is also used as the working cell for wavelength locking so that the laser wavelength can be locked on the corresponding wavelength of the D1 line transition without any additional setup.The digital proportional integral differential and fuzzy control algorithm is used for laser temperature control and the temperature fluctuation is within±0.005℃.Laser current driving is realized based on current mirror and the current fluctuation is within±50 nA,which provides a good hardware foundation for laser wavelength locking.Finally,a stable signal output of the OPM for up to two hours under laboratory conditions is realized.

关 键 词：光泵磁力仪 垂直腔面发射激光器 波长锁定 激光稳频 

分 类 号：TN248.4[电子电信—物理电子学]