In recent years, various sensors for biomagnetic measurement have been researched and developed. These are mainly for low frequency small signals such as magnetocardiography. Optical pumped atomic magnetometer (OPAM) would rather be applicable to this high frequency signal since there is a valid signal at higher frequencies. However, the highly sensitive OPAM uses a magnetic shield and an anti‐vibration table, which makes the OPAM system larger. By packing the optical system in one case, you can develop an OPAM module that can measure even while moving. As a result, by using a phase‐locked loop, we have achieved a sensitivity of 2.548 pT/Hz^1/2 for a 100 kHz magnetic signal in the presence of a bias magnetic field and electromagnetic noise.

中文翻译：

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用于非磁屏蔽的100 kHz光抽运原子磁力计模块的开发

近年来，已经研究和开发了用于生物磁测量的各种传感器。这些主要用于低频小信号，例如心电图。光泵原子磁强计（OPAM）宁可适用于此高频信号，因为在较高频率下存在有效信号。但是，高度灵敏的OPAM使用磁屏蔽和防震台，这使OPAM系统变得更大。通过将光学系统包装在一种情况下，您可以开发一个即使在移动时也可以进行测量的OPAM模块。结果，通过使用锁相环，在存在偏置磁场和电磁噪声的情况下，对于100 kHz磁信号，我们获得了2.548 pT / Hz ^1/2的灵敏度。