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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
Received:22 September 2022,
Revised:14 October 2022,
Published:10 May 2023
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黄艺明,李绍良,骆曼箬等.双气室铯光泵磁力仪设计与验证[J].光学精密工程,2023,31(09):1325-1334.
HUANG Yiming,LI Shaoliang,LUO Manruo,et al.Design and verification of dual-cell cesium optically pumped magnetometer[J].Optics and Precision Engineering,2023,31(09):1325-1334.
黄艺明,李绍良,骆曼箬等.双气室铯光泵磁力仪设计与验证[J].光学精密工程,2023,31(09):1325-1334. DOI: 10.37188/OPE.20233109.1325.
HUANG Yiming,LI Shaoliang,LUO Manruo,et al.Design and verification of dual-cell cesium optically pumped magnetometer[J].Optics and Precision Engineering,2023,31(09):1325-1334. DOI: 10.37188/OPE.20233109.1325.
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37 586.79 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25 700~77 000 nT,灵敏度约为
<math id="M1"><mn mathvariant="normal">20</mn><mtext> </mtext><mrow><mrow><mi mathvariant="normal">p</mi><mi mathvariant="normal">T</mi></mrow><mo>/</mo><mrow><mroot><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">z</mi></mrow><mrow/></mroot></mrow></mrow></math>
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。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 37 586.79 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 25 700-77 000 nT, and the sensitivity is approximately 20 pT
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. 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.
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