Scanning a multi-channel spin-exchange relaxation-free atomic magnetometer with high spatial and time resolution.
Opt Lett
; 47(15): 3908-3911, 2022 Aug 01.
Article
em En
| MEDLINE
| ID: mdl-35913344
ABSTRACT
The emerging multi-channel spin-exchange relaxation-free (SERF) atomic magnetometer is a promising candidate for non-intrusive biomagnetism imaging. In this study, we propose a scanning 9-channel SERF magnetometer based on an acousto-optic modulator (AOM). Using the diffraction light of the AOM as the probe laser (with a low laser power of 1.7â
mW), 9 channels were rapidly scanned by altering the diffraction angle. The scanning imaging scheme provides a new, to the best of our knowledge, approach for multi-channel magnetic field measurement and realizes a single-channel sensitivity of about 3 fT/Hz1/2, a spatial resolution of 0.6â
mm, and a time resolution of about 2.7â
ms, which is well suited for real-time extremely weak magnetic field imaging.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Opt Lett
Ano de publicação:
2022
Tipo de documento:
Article