磁强计
光学
物理
磁场
灵敏度(控制系统)
激光器
核磁共振
电子工程
量子力学
工程类
作者
Yeguang Yan,Jixi Lu,Shaowen Zhang,Fei Lu,Kaifeng Yin,Kun Wang,Binquan Zhou,Gang Liu
出处
期刊:Optics Express
[The Optical Society]
日期:2022-05-04
卷期号:30 (11): 18300-18300
被引量:46
摘要
We propose a three-axis closed-loop optically pumped magnetometer with high sensitivity. The closed-loop magnetometer has a three-axis sensitivity of approximately 30 fT/Hz1/2 using two orthogonal laser beams for pumping and probing the alkali metal atoms. In the closed-loop mode, the dynamic range is improved from ±5 nT to ±150 nT. The bandwidth is increased from about 100 Hz to over 2 kHz with 10 kHz modulation fields in x- and y-axes and another 6 kHz modulation field along the z-axis. Compared with single-axis or dual-axis magnetometers, the proposed magnetometer not only provides the direction and magnitude of the magnetic field but also has high robustness in a challenging environment. The magnetometer has applications in biomagnetic measurements, magnetic resonance imaging, and fundamental physics.
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