Vector light shift averaging in paraffin-coated alkali vapor cells


Light shifts are an important source of noise and systematics in optically pumped magnetometers. We demonstrate that the long spin-coherence time in paraffin-coated cells leads to spatial averaging of the vector light shift over the entire cell volume. This renders the averaged vector light shift independent, under certain approximations, of the light-intensity distribution within the sensor cell. Importantly, the demonstrated averaging mechanism can be extended to other spatially varying phenomena in anti-relaxation-coated cells with long coherence times.

Autorzy / Authors: 
E. Zhivun, A. Wickenbrock, J. Sudyka, B. Patton, S. Pustelny and D. Budker
Opt. Express 24, 15384
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