Experimental realization of coherent dark-state magnetometers
- 1 October 1998
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 44 (1) , 31-36
- https://doi.org/10.1209/epl/i1998-00430-0
Abstract
Coherent population trapping resonances in cesium vapor can be used to determine DC flux densities in the range from 1 μT to 1 mT with typically 310−5 relative uncertainty. For fields modulated at a few kHz, we find sensitivities of below 10 pT within 0.5 s integration time. From the signal-to-noise ratio the sensitivity can be extrapolated to 500 fT/√Hz. A quantitative understanding of the lineshape allows to detect DC fields of several nT even when the Zeeman components of the resonance are not resolved.Keywords
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