An atomic magnetic gradiometer with 1/τ uncertainty property based on the self-sustaining method

Q. Zhao; B. L. Fan; S. G. Wang; L. J. Wang

doi:10.1117/12.2521032

24 January 2019 An atomic magnetic gradiometer with 1/τ uncertainty property based on the self-sustaining method

Q. Zhao, B. L. Fan, S. G. Wang, L. J. Wang

Proceedings Volume 11052, Third International Conference on Photonics and Optical Engineering; 110520F (2019) https://doi.org/10.1117/12.2521032
Event: The International Conference on Photonics and Optical Engineering, 2018, Xi'an, China

Abstract

The magnetic field is one of the most important physical observables with about all electromagnetic information. Larmor precession atomic magnetometers based on optical pumping experienced considerable attention recently. However, the sensitivity of this kind of atomic magnetometers is limited by their spin coherence time and the systematic noise. Here, we propose a self-sustaining atomic magnetic gradiometer that shows a superior 1/τ behavior in the magnetic field uncertainty measurement over time. The gradiometer is implemented by mixing and filtering the different frequency signals from two adjacent spin self-sustaining magnetometers with a baseline equal to 1 cm. The common-mode noise is suppressed and a gradient sensitivity of 200 fT/(√Hz=cm) is realized, being close to the shot noise limit.

Citation Download Citation

Q. Zhao, B. L. Fan, S. G. Wang, and L. J. Wang "An atomic magnetic gradiometer with 1/τ uncertainty property based on the self-sustaining method", Proc. SPIE 11052, Third International Conference on Photonics and Optical Engineering, 110520F (24 January 2019); https://doi.org/10.1117/12.2521032

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