双气室铯光泵磁力仪设计与验证  

Design and verification of dual-cell cesium optically pumped magnetometer

作　　者：黄艺明 李绍良 骆曼箬 吴招才 刘华[1] HUANG Yiming;LI Shaoliang;LUO Manruo;WU Zhaocai;LIU Hua(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Aerospace Control Technology Institute,Shanghai Inertia Engineering Technology Research Center,Shanghai 201109,China;Second Institute of Oceanography,The 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,上海惯性工程技术研究中心,上海201109 [3]自然资源部第二海洋研究所,浙江杭州310012

出　　处：《光学精密工程》2023年第9期1325-1334,共10页Optics and Precision Engineering

基　　金：上海航天先进技术联合研究基金资助项目(No.USCAST2019-23);上海交通大学“深蓝计划”基金资助项目(No.SL2021ZD202);“十三五”装备预研领域基金资助项目(No.61405170103)。

摘　　要：由于自激振荡式单气室光泵磁力仪受移相电路限制测量范围较窄,对双气室光泵磁力仪进行集成化研究和改进,基于对光泵磁力仪基本原理的推导论证,提出了双气室铯光泵磁力仪的一种高度集成的设计结构。该方案中以垂直腔面发射激光器作为泵浦光源,以刀锋直角棱镜反射镜作为分光镜片,其余元件沿光轴对称排布,利用左旋、右旋圆偏振光的双泵浦光结构和双气室布置实现相移互补,不需要移相电路。利用搭建的原理样机测得实验环境下地磁场强度为37586.79 nT,并利用扫描方式测得三轴分量。双气室铯光泵磁力仪原理样机的测量范围为25700~77000 nT,灵敏度约为20 pT/(Hz)1/2。实验结果和对比测量结果、理论计算结果相吻合,验证了双气室光泵磁力仪的理论分析,证实了该双气室光泵磁力仪结构的可行性和精确度。Regarding the wide application of geomagnetic field measurement in magnetic prospecting,navigation,and positioning,the measurement range of the single-cell self-oscillating optically pumped magnetometer(OPM)is limited by the phase-shift circuit,and the existing dual-cell OPM abroad exhibits a low integration degree and poor portability.In this study,the integration of the dual-cell OPM is improved to break the blockade and improve the research level of the domestic OPM.Through the derivation and demonstration of the principle of the OPM,a highly integrated structure design of the dual-cell cesium OPM is presented.A VCSEL is used as the pump light source,and a knife-edge right-angle prism mirror is used as the spectroscope,while other components are arranged symmetrically along the optical axis.A dual-pump light structure with left-and right-handed circularly polarized light and a dual-cell arrangement is used,which achieves precise phase-shift compensation and avoids the need for a phase-shift circuit.The geomagnetic field in the experimental environment is 37586.79 nT,as measured by a prototype,and the magnitude of the triaxial component is obtained via the scanning method.The measurement range of the OPM prototype is 25700-77000 nT,and the sensitivity is approximately 20 pT Hz.The experimental results are consistent with the comparative measurement and theoretical calculation results,validating the theoretical analysis of the dual-cell OPM and confirming its feasibility,accuracy,and advantages for improving the system integration.

关 键 词：地磁场 光泵磁力仪 磁共振 双气室 测量范围 集成化 

分 类 号：TH744[机械工程—光学工程] TM937.1[机械工程—仪器科学与技术]