Signal-enhanced high-sensitivity atomic magnetometer based on multi-pass cell

We propose a signal- and sensitivity-enhanced spin-exchange-relaxation-free atomic magnetometer utilizing a multi-pass cell with a highly spatially homogeneous optical pumping scheme. The relationship between the magnetometer’s performance and the number of probe beam passes is measured. The optical...

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Bibliographic Details
Published in:Applied physics express 2024-11, Vol.17 (11), p.112003
Main Authors: Peng, Jin, Yin, Yiran, Xu, An-Ning, Liu, Bei, Li, Zhiqiang, Wang, Chun
Format: Article
Language:English
Subjects:
atomic magnetometer
linear correlation
multi-pass cell
signal- and sensitivity-enhanced
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Summary:We propose a signal- and sensitivity-enhanced spin-exchange-relaxation-free atomic magnetometer utilizing a multi-pass cell with a highly spatially homogeneous optical pumping scheme. The relationship between the magnetometer’s performance and the number of probe beam passes is measured. The optical rotation angle exhibits a linear correlation with the number of passes, achieving 89 mrad nT −1 for a quadruple-pass cell. However, the sensitivity does not increase linearly when further increasing the optical length due to the noise limit. This work provides a method to study the enhancement performance of the magnetic response and sensitivity in atomic magnetometers by using multi-pass cells.
ISSN:1882-0778
1882-0786
DOI:10.35848/1882-0786/ad9078