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Tenth International Conference on Information Optics and Photonics

The impact of radio-frequency magnetic field on atomic magnetometer

Yang-Ying Fu, Jie Yuan

Published Dec 20, 2019• 0 citations
Publisher

Abstract

The impact of radio-frequency magnetic field on the cesium atomic magnetometer is investigated. A theoretical model based on Bloch equation is provided, which predicts the properties of magnetometer. A cesium atomic magnetometer is designed for the experimental measurements. The magnetometer linewidth and sensitivity, as a function of radio-frequency magnetic field size are obtained. The experimental results are in agreement with what predicted by the theoretical model. The results, both theoretical and experimental included, indicate that there is an optimal radio-frequency magnetic field size, at which value the magnetometer sensitivity is highest. This work enlightens the parameter optimization of atomic magnetometer, and helps for the enhancement of magnetometer sensitivity.

DOI
10.1117/12.2542400

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Recently, atomic magnetometers have been researched widely for its ultra high sensitivity. But the influence of pump light’s duty cycle on atomic magnetometers has been concerned little. In this paper, we described a sensitive cesium atomic magnetometer based on circular dichroism, which had the advantage of easily locking the probing laser to the necessary frequency. We experimentally investigated the amplitudes and linewidths of magnetic resonance signals at different modulated duty cycle of the pump light. The result indicated that our magnetometer achieved the highest sensitivity at the duty cycle of 30%. It’s valuable for optimizing the sensitivity of most atomic magnetometers.
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