Abstract
We demonstrate a scalar optical magnetometer that retains magnetic-field sensitivities below over 3 dB bandwidths of 10 kHz in an ambient field and using a measurement volume of . The magnetometer operates at high atomic densities where both the sensitivity and the bandwidth are limited by spin-exchange collisions between the alkali atoms. By operating in this regime, our measurements show that the bandwidth of the magnetometer can be increased without a significant degradation in its sensitivity.
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