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Lecture notes in electrical engineering

Progress on Novel Atomic Magnetometer and Gyroscope Based on Self-sustaining of Electron Spins

Shiguang Wang, Chi Xu, Y. Y. Feng, L. J. Wang

Published Jan 1, 2017• 3 citations
Publisher
DOI
10.1007/978-981-10-4591-2_43

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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.