A compact and closed-loop spin-exchange relaxation-free atomic magnetometer for wearable magnetoencephalography

doi:10.1088/1674-1056/ac7e38

中国物理B ›› 2023, Vol. 32 ›› Issue (4): 40702-040702.doi: 10.1088/1674-1056/ac7e38

A compact and closed-loop spin-exchange relaxation-free atomic magnetometer for wearable magnetoencephalography

Qing-Qian Guo(郭清乾)^1,2,3, Tao Hu(胡涛)^1,3,†, Xiao-Yu Feng(冯晓宇)³, Ming-Kang Zhang(张明康)⁴, Chun-Qiao Chen(陈春巧)⁴, Xin Zhang(张欣)^1,2,3, Ze-Kun Yao(姚泽坤)⁴, Jia-Yu Xu(徐佳玉)⁴, Qing Wang(王青)^1,2,3, Fang-Yue Fu(付方跃)⁴, Yin Zhang(张寅)^1,3, Yan Chang(常严)^1,3, and Xiao-Dong Yang(杨晓冬)^3,1,‡

1 Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China;
2 School of Biomedical Engineering(Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China;
3 Jihua Laboratory, Foshan 528000, China;
4 School of Electronic and Information Engineering, Changchun University of Science and Technology, Changchun 130022, China

收稿日期:2022-05-03 修回日期:2022-06-24 接受日期:2022-07-05 出版日期:2023-03-10 发布日期:2023-03-23
通讯作者: Tao Hu, Xiao-Dong Yang E-mail:hutao@sibet.ac.cn;xiaodong.yang@sibet.ac.cn
基金资助:
Project supported by Ji Hua Laboratory (Grant No. X190131TD190), the Research and Development Project for Equipment of Chinese Academy of Sciences (Grant No. YJKYYQ20210051), the Suzhou pilot project of basic research (Grant No. SJC2021024), and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20200215).

A compact and closed-loop spin-exchange relaxation-free atomic magnetometer for wearable magnetoencephalography

1 Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China;
2 School of Biomedical Engineering(Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China;
3 Jihua Laboratory, Foshan 528000, China;
4 School of Electronic and Information Engineering, Changchun University of Science and Technology, Changchun 130022, China

Received:2022-05-03 Revised:2022-06-24 Accepted:2022-07-05 Online:2023-03-10 Published:2023-03-23
Contact: Tao Hu, Xiao-Dong Yang E-mail:hutao@sibet.ac.cn;xiaodong.yang@sibet.ac.cn
Supported by:
Project supported by Ji Hua Laboratory (Grant No. X190131TD190), the Research and Development Project for Equipment of Chinese Academy of Sciences (Grant No. YJKYYQ20210051), the Suzhou pilot project of basic research (Grant No. SJC2021024), and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20200215).

1. 附件.pdf(277KB)

摘要/Abstract

摘要： Atomic magnetometers operated in the spin-exchange relaxation-free (SERF) regime are the promising sensor to replace superconducting quantum interference devices (SQUIDs) in the biomagnetism field. The SERF magnetometer with compact size and good performance is crucial to the new generation of wearable magnetoencephalography (MEG) system. In this paper, we developed a compact and closed-loop SERF magnetometer with the dimensions of 15.0×22.0×30.0 mm³ based on a single-beam configuration. The bandwidth of the magnetometer was extended to 675 Hz while the sensitivity was maintained at 22 fT/Hz^1/2. A nearly 3-fold enhancement of the bandwidth was obtained in comparison with the open-loop control. The implementation of the closed-loop control also greatly improved the dynamic range, enabling the magnetometer to be robust against the disturbance of the ambient field. Moreover, the magnetometer was successfully applied for the detection of human α -rhythm and auditory evoked fields (AEFs), which demonstrated the potential to be extended to multi-channel MEG measurements for future neuroscience studies.

关键词: atomic magnetometer, miniaturization, closed-loop, magnetoencephalography (MEG)

Abstract: Atomic magnetometers operated in the spin-exchange relaxation-free (SERF) regime are the promising sensor to replace superconducting quantum interference devices (SQUIDs) in the biomagnetism field. The SERF magnetometer with compact size and good performance is crucial to the new generation of wearable magnetoencephalography (MEG) system. In this paper, we developed a compact and closed-loop SERF magnetometer with the dimensions of 15.0×22.0×30.0 mm³ based on a single-beam configuration. The bandwidth of the magnetometer was extended to 675 Hz while the sensitivity was maintained at 22 fT/Hz^1/2. A nearly 3-fold enhancement of the bandwidth was obtained in comparison with the open-loop control. The implementation of the closed-loop control also greatly improved the dynamic range, enabling the magnetometer to be robust against the disturbance of the ambient field. Moreover, the magnetometer was successfully applied for the detection of human α -rhythm and auditory evoked fields (AEFs), which demonstrated the potential to be extended to multi-channel MEG measurements for future neuroscience studies.

Key words: atomic magnetometer, miniaturization, closed-loop, magnetoencephalography (MEG)

中图分类号: (Magnetometers for magnetic field measurements)

07.55.Ge

07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing) 87.85.-d (Biomedical engineering) 87.85.Pq (Biomedical imaging)

Qing-Qian Guo(郭清乾), Tao Hu(胡涛), Xiao-Yu Feng(冯晓宇), Ming-Kang Zhang(张明康), Chun-Qiao Chen(陈春巧), Xin Zhang(张欣), Ze-Kun Yao(姚泽坤), Jia-Yu Xu(徐佳玉),Qing Wang(王青), Fang-Yue Fu(付方跃), Yin Zhang(张寅), Yan Chang(常严), and Xiao-Dong Yang(杨晓冬). A compact and closed-loop spin-exchange relaxation-free atomic magnetometer for wearable magnetoencephalography[J]. 中国物理B, 2023, 32(4): 40702-040702.

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A compact and closed-loop spin-exchange relaxation-free atomic magnetometer for wearable magnetoencephalography

A compact and closed-loop spin-exchange relaxation-free atomic magnetometer for wearable magnetoencephalography

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