| Issue |
Europhys. Lett.
Volume 44, Number 1, October I 1998
|
|
|---|---|---|
| Page(s) | 31 - 36 | |
| Section | Classical areas of phenomenology | |
| DOI | https://doi.org/10.1209/epl/i1998-00430-0 | |
| Published online | 01 September 2002 | |
Experimental realization of coherent dark-state magnetometers
Institut für Angewandte Physik, Universität Bonn, Wegelerstraße 8, 53115 Bonn, Germany
Received:
3
April
1998
Accepted:
28
July
1998
Coherent population trapping resonances in cesium vapor can be used to
determine DC flux densities in the range from 
to 1 mT with
typically 
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 
. 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.
PACS: 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light / 32.70.Jz – Line shapes, widths, and shifts / 07.55.Ge – Magnetometers for magnetic field measurements
© EDP Sciences, 1998
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