All-Optical Magnetometric Sensor for Magnetoencephalography and Ultralow Field Tomography
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tical Magnetometric Sensor for Magnetoencephalography and Ultralow Field Tomography A. K. Vershovskiia*, A. S. Pazgaleva, and M. V. Petrenkoa a Ioffe
Physical Technical Institute, Russian Academy of Sciences, St. Petersburg, 194021 Russia *e-mail: [email protected] Received April 15, 2020; revised May 23, 2020; accepted June 1, 2020
Abstract—A variant of the scheme of a magnetometric sensor based on cesium atomic vapor is proposed and experimentally investigated. The sensor uses magnetic resonance excitation by modulated light of an hyperfine optical pumping that is transverse to the magnetic field. It is shown that, for a cell with a volume of 0.125 cm3, the variational sensitivity of such a scheme, estimated from the ratio of the steepness of the signal in the center of the magnetic resonance to the shot noise of the detecting radiation, reaches a level of
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