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arXiv · 1303.2312

Real-time vector field tracking with a cold-atom magnetometer

Naeimeh Behbood·Ferran Martin Ciurana·Giorgio Colangelo·Mario Napolitano·Morgan W. Mitchell·Robert J. Sewell
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Abstract

We demonstrate a fast three-axis optical magnetometer using cold, optically-trapped $^{87}$Rb gas as a sensor. By near-resonant Faraday rotation we record the free-induction decay following optical pumping along two orthogonal axes to obtain the three field components and one gradient component. A single measurement achieves shot-noise limited sub-nT sensitivity in 1 ms, with transverse spatial resolution of $\sim$ 20 $\mu$m. We make a detailed analysis of the shot-noise-limited sensitivity.

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Naeimeh Behbood, Ferran Martin Ciurana, Giorgio Colangelo, Mario Napolitano, Morgan W. Mitchell, Robert J. Sewell. 2013-03-10. Real-time vector field tracking with a cold-atom magnetometer. https://doi.org/10.1063/1.4803684

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