利用原子磁力计抑制电流源噪声。

Suppression of current source noise with an atomic magnetometer.

作者信息

Shen Liang, Zhang Rui, Wu Teng, Peng Xiang, Yu Song, Chen Jingbiao, Guo Hong

机构信息

Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China.

State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, and Center for Quantum Information Technology, Peking University, Beijing 100871, China.

出版信息

Rev Sci Instrum. 2020 Aug 1;91(8):084701. doi: 10.1063/5.0009987.

DOI:10.1063/5.0009987

PMID:32872964

Abstract

This paper introduces a method for using an atomic magnetometer to suppress current source noise. In this method, the current noise is (i) suppressed with a lamp-pumped cesium atomic magnetometer and (ii) measured with a higher-sensitivity laser-pumped cesium atomic magnetometer. The current noise is compared before and after noise suppression at an output current of 50 mA, and the noise-suppression ratio is ∼27 dB. The noise-suppression performance can be enhanced by improving the sensitivity of the atomic magnetometer and the ability to restrain the ambient magnetic noise. This method has practical applications in metrology and fundamental physics research.

摘要

本文介绍了一种使用原子磁力仪抑制电流源噪声的方法。在该方法中，电流噪声通过以下方式处理：（i）用灯泵浦铯原子磁力仪进行抑制，以及（ii）用更高灵敏度的激光泵浦铯原子磁力仪进行测量。在输出电流为50 mA时，比较了噪声抑制前后的电流噪声，噪声抑制比约为27 dB。通过提高原子磁力仪的灵敏度和抑制环境磁噪声的能力，可以增强噪声抑制性能。该方法在计量学和基础物理研究中具有实际应用。