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Chin. Phys. B, 2017, Vol. 26(12): 120702    DOI: 10.1088/1674-1056/26/12/120702
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A dual-axis, high-sensitivity atomic magnetometer

Rujie Li(李茹杰), Wei Quan(全伟), Wenfeng Fan(范文峰), Li Xing(邢力), Zhuo Wang(王卓), Yueyang Zhai(翟跃阳), Jiancheng Fang(房建成)
School of Instrument Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China
Abstract  Atomic magnetometer (AM) operated in a spin-exchange relaxation-free (SERF) regime features superior sensitivity and non-cryogenic operation, and thus is competitive with the best superconducting quantum interference devices. Previously, SERF AM with fT/Hz1/2 level sensitivity commonly acted as a single-axis sensor. Here we demonstrate a dual-axis SERF AM capable of simultaneously and independently detecting x-and y-field components with a sensitivity of 20 fT/Hz1/2. As there is no necessity to worry about the cross-talk effects arising from field modulations, the dual-axis scheme proposed here is of particular interest to AM array and hence the biomagnetic applications.
Keywords:  optically pumped magnetometers      multi-axis field measurements      high-sensitivity field measurements      polarized atoms  
Received:  16 July 2017      Revised:  25 August 2017      Accepted manuscript online: 
PACS:  07.55.Ge (Magnetometers for magnetic field measurements)  
  07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)  
  42.81.Pa (Sensors, gyros)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61227902, 61673041, and 61374210), the National Key R & D Program of China (Grant No. 2016YFB0501601), and the Academic Excellence Foundation of Beihang University (BUAA) for PhD Students.
Corresponding Authors:  Rujie Li, Rujie Li     E-mail:;

Cite this article: 

Rujie Li(李茹杰), Wei Quan(全伟), Wenfeng Fan(范文峰), Li Xing(邢力), Zhuo Wang(王卓), Yueyang Zhai(翟跃阳), Jiancheng Fang(房建成) A dual-axis, high-sensitivity atomic magnetometer 2017 Chin. Phys. B 26 120702

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