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Proceedings Paper

A spin self-sustaining atomic magnetometer for high-precision measurements in large magnetic fields
Author(s): Qin Zhao; Bolin Fan; Shiguang Wang; Lijun Wang
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Paper Abstract

Measurement of magnetic fields by monitoring the Larmor precession of atomic spins is commonly used nowadays because of the high sensitivity and absolute measurement. This paper proposes a novel atomic magnetometer based on the self-sustaining method for large and fluctuating magnetic fields. In combination with the indefinitely persist Larmor precession signal, the sensitivity of the magnetometer increases following a much faster τ-1 rule beyond the atomic coherence lifetime. The maximum magnetic field have been experimentally demonstrated up to 40000 nT, the sensitivity achieved is 20 pT/√Hz and the frequency response bandwidth is 5 kHz, respectively. This magnetic field sensor is advantageous for applications requiring high sensitivity over a wide dynamic range such as geology and space physics.

Paper Details

Date Published: 18 November 2019
PDF: 7 pages
Proc. SPIE 11189, Optical Metrology and Inspection for Industrial Applications VI, 1118903 (18 November 2019); doi: 10.1117/12.2535392
Show Author Affiliations
Qin Zhao, Tsinghua Univ. (China)
Bolin Fan, Tsinghua Univ. (China)
Shiguang Wang, Tsinghua Univ. (China)
Lijun Wang, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 11189:
Optical Metrology and Inspection for Industrial Applications VI
Sen Han; Toru Yoshizawa; Song Zhang; Benyong Chen, Editor(s)

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