Different sensitivities of two optical magnetometers realized in the same experimental arrangement

Scientific Reports
Piotr PutSzymon Pustelny

Abstract

In this article, operation of optical magnetometers detecting static (DC) and oscillating (AC) magnetic fields is studied and comparison of the devices is performed. To facilitate the comparison, the analysis is carried out in the same experimental setup, exploiting nonlinear magneto-optical rotation. In such a system, a control over static-field magnitude or oscillating-field frequency provides detection of strength of the DC or AC fields. Polarization rotation is investigated for various light intensities and AC-field amplitudes, which allows to determine optimum sensitivity to both fields. With the results, we demonstrate that under optimal conditions the AC magnetometer is about ten times more sensitive than its DC counterpart, which originates from different response of the atoms to the fields. Bandwidth of the magnetometers is also analyzed, revealing its different dependence on the light power. Particularly, we demonstrate that bandwidth of the AC magnetometer can be significantly increased without strong deterioration of the magnetometer sensitivity. This behavior, combined with the ability to tune the resonance frequency of the AC magnetometer, provide means for ultra-sensitive measurements of the AC field in a broad b...Continue Reading

References

Aug 11, 2005·Physical Review Letters·I M SavukovK L Sauer
Aug 4, 2006·Proceedings of the National Academy of Sciences of the United States of America·Shoujun XuAlexander Pines
Jan 9, 2007·Journal of Magnetic Resonance·I M SavukovM V Romalis
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Nov 10, 2013·Physics in Medicine and Biology·Vishal K Shah, Ronald T Wakai
Feb 3, 2019·The Review of Scientific Instruments·P BevingtonW Chalupczak

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Citations

Mar 15, 2020·Sensors·Dmitry MurzinValeria Rodionova

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Methods Mentioned

BETA
nuclear magnetic resonance
NMR

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