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An optically pumped magnetic gradiometer for the detection of human biomagnetism.

Authors :
Cook H
Bezsudnova Y
Koponen LM
Jensen O
Barontini G
Kowalczyk AU
Source :
Quantum science and technology [Quantum Sci Technol] 2024 Jul 01; Vol. 9 (3), pp. 035016. Date of Electronic Publication: 2024 Apr 26.
Publication Year :
2024

Abstract

We realise an intrinsic optically pumped magnetic gradiometer based on non-linear magneto-optical rotation. We show that our sensor can reach a gradiometric sensitivity of 18 fT cm - 1 Hz - 1 and can reject common mode homogeneous magnetic field noise with up to 30 dB attenuation. We demonstrate that our magnetic field gradiometer is sufficiently sensitive and resilient to be employed in biomagnetic applications. In particular, we are able to record the auditory evoked response of the human brain, and to perform real-time magnetocardiography in the presence of external magnetic field disturbances. Our gradiometer provides complementary capabilities in human biomagnetic sensing to optically pumped magnetometers, and opens new avenues in the detection of human biomagnetism.<br /> (© 2024 IOP Publishing Ltd.)

Details

Language :
English
ISSN :
2058-9565
Volume :
9
Issue :
3
Database :
MEDLINE
Journal :
Quantum science and technology
Publication Type :
Academic Journal
Accession number :
38680502
Full Text :
https://doi.org/10.1088/2058-9565/ad3d81