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  • Chinese Optics Letters
  • Vol. 18,
  • Issue 3,
  • pp. 031202-
  • (2020)

Current sensor based on an atomic magnetometer for DC application

Guozhu Li, Qing Xin, Xuxing Geng, Zhi Liang, Shangqing Liang, Guangming Huang, Gaoxiang Li, and Guoqing Yang

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Abstract

A DC current sensor based on an optically pumped atomic magnetometer is proposed. It has a high linearity in a wide operation range, since the magnetometer measures the absolute magnitude of the magnetic field produced by the current to be measured. The current sensor exhibits a high accuracy with a non-moment solenoid and magnetic shielding to suppress the influence from the environment. The absolute error of the measured current is below 0.08 mA when the range is from 7.5 mA to 750 mA. The relative error is 5.54 × 10−5 at 750 mA.

© 2020 Chinese Laser Press

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