Dual-beam room-temperature atomic magnetometer with high sensitivity and large dynamic range

We demonstrate a dual-beam high-sensitivity room-temperature atomic magnetometer (AM) with a large dynamic range based on a nonlinear magneto-optical rotation (NMOR) enhancing scheme. Using an inelastic wave-mixing laser, we find significant NMOR signal enhancement compared with a single-beam scheme...

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Bibliographic Details
Published in:Applied physics express 2023-01, Vol.16 (1), p.12008
Main Authors: Liu, Bei, Peng, Jin, Wang, Hai-Ning, Fang, Chang-Feng, Wang, Jun-Lei, Zhao, Xian, Deng, Lu
Format: Article
Language:English
Subjects:
atomic magnetometer
dual-beam
high sensitivity
room temperature
wave-mixing enhancement
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Summary:We demonstrate a dual-beam high-sensitivity room-temperature atomic magnetometer (AM) with a large dynamic range based on a nonlinear magneto-optical rotation (NMOR) enhancing scheme. Using an inelastic wave-mixing laser, we find significant NMOR signal enhancement compared with a single-beam scheme under the same far-detuned operation conditions. This dual-beam scheme is shown to operate well in the regime of lower laser intensity and off-resonance detuning. The best sensitivity achieved is 20 fT/Hz 1/2 with a bandwidth of 2 kHz, substantially greater than common spin-exchange relaxation-free AMs. This provides a way to develop low-power, inexpensive miniaturized AMs for wide application.
ISSN:1882-0778
1882-0786
DOI:10.35848/1882-0786/acaa1c