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2015 ; 5
(ä): 15448
Nephropedia Template TP
Sci Rep
2015[Oct]; 5
(ä): 15448
PMID26481853
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Atom sensing based on Faraday rotation is an indispensable method for precision
measurements, universally suitable for both hot and cold atomic systems. Here we
demonstrate an all-optical magnetometer where the optical cell for Faraday
rotation spectroscopy is augmented with a low finesse cavity. Unlike in previous
experiments, where specifically designed multipass cells had been employed, our
scheme allows to use conventional, spherical vapour cells. Spherical shaped cells
have the advantage that they can be effectively coated inside with a spin
relaxation suppressing layer providing long spin coherence times without addition
of a buffer gas. Cavity enhancement shows in an increase in optical polarization
rotation and sensitivity compared to single-pass configurations.