中国物理B ›› 2022, Vol. 31 ›› Issue (11): 110703-110703.doi: 10.1088/1674-1056/ac6010

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Dynamic range and linearity improvement for zero-field single-beam atomic magnetometer

Kai-Feng Yin(尹凯峰)1, Ji-Xi Lu(陆吉玺)2,3,†, Fei Lu(逯斐)1,2, Bo Li(李博)3, Bin-Quan Zhou(周斌权)2, and Mao Ye(叶茂)2,3,‡   

  1. 1 School of Instrumentation Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China;
    2 Research Institute for Frontier Science, Beihang University, Beijing 100191, China;
    3 Beihang Hangzhou Innovation Institute Yuhang, Xixi Octagon City, Hangzhou 310023, China
  • 收稿日期:2021-12-26 修回日期:2022-03-22 接受日期:2022-03-23 出版日期:2022-10-17 发布日期:2022-10-19
  • 通讯作者: Ji-Xi Lu, Mao Ye E-mail:lujixi@buaa.edu.cn;maoye@buaa.edu.cn
  • 基金资助:
    Project supported by the National Key R&D Program of China (Grant No. 2018YFB2002405) and the National Natural Science Foundation of China (Grant No. 61903013).

Dynamic range and linearity improvement for zero-field single-beam atomic magnetometer

Kai-Feng Yin(尹凯峰)1, Ji-Xi Lu(陆吉玺)2,3,†, Fei Lu(逯斐)1,2, Bo Li(李博)3, Bin-Quan Zhou(周斌权)2, and Mao Ye(叶茂)2,3,‡   

  1. 1 School of Instrumentation Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China;
    2 Research Institute for Frontier Science, Beihang University, Beijing 100191, China;
    3 Beihang Hangzhou Innovation Institute Yuhang, Xixi Octagon City, Hangzhou 310023, China
  • Received:2021-12-26 Revised:2022-03-22 Accepted:2022-03-23 Online:2022-10-17 Published:2022-10-19
  • Contact: Ji-Xi Lu, Mao Ye E-mail:lujixi@buaa.edu.cn;maoye@buaa.edu.cn
  • Supported by:
    Project supported by the National Key R&D Program of China (Grant No. 2018YFB2002405) and the National Natural Science Foundation of China (Grant No. 61903013).

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摘要： Zero-field single-beam atomic magnetometers with transverse parametric modulation for ultra-weak magnetic field detection have attracted widespread attention recently. In this study, we present a comprehensive response model and propose a modification method of conventional first harmonic response by introducing the second harmonic correction. The proposed modification method gives improvement in dynamic range and reduction of linearity error. Additionally, our modification method shows suppression of response instability caused by optical intensity and frequency fluctuations. An atomic magnetometer with single-beam configuration is built to compare the performance between our proposed method and the conventional method. The results indicate that our method's magnetic field response signal achieves a 5-fold expansion of dynamic range from 2 nT to 10 nT, with the linearity error decreased from 5% to 1%. Under the fluctuations of 5% for optical intensity and ±15 GHz detuning of frequency, the proposed modification method maintains intensity-related instability less than 1% and frequency-related instability less than 8% while the conventional method suffers 15% and 38%, respectively. Our method is promising for future high-sensitive and long-term stable optically pumped atomic sensors.

关键词: atomic magnetometer, dynamic range, linearity error, response signal stability

Abstract: Zero-field single-beam atomic magnetometers with transverse parametric modulation for ultra-weak magnetic field detection have attracted widespread attention recently. In this study, we present a comprehensive response model and propose a modification method of conventional first harmonic response by introducing the second harmonic correction. The proposed modification method gives improvement in dynamic range and reduction of linearity error. Additionally, our modification method shows suppression of response instability caused by optical intensity and frequency fluctuations. An atomic magnetometer with single-beam configuration is built to compare the performance between our proposed method and the conventional method. The results indicate that our method's magnetic field response signal achieves a 5-fold expansion of dynamic range from 2 nT to 10 nT, with the linearity error decreased from 5% to 1%. Under the fluctuations of 5% for optical intensity and ±15 GHz detuning of frequency, the proposed modification method maintains intensity-related instability less than 1% and frequency-related instability less than 8% while the conventional method suffers 15% and 38%, respectively. Our method is promising for future high-sensitive and long-term stable optically pumped atomic sensors.

Key words: atomic magnetometer, dynamic range, linearity error, response signal stability

中图分类号:  (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)

  • 07.07.Df
07.55.Ge (Magnetometers for magnetic field measurements) 06.20.fb (Standards and calibration) 32.30.Dx (Magnetic resonance spectra)