V. I. Yudin, M. Yu. Basalaev, D. V. Kovalenko, A. V. Taichenachev, J. Pollock, A. Hansen, W. McGehee, J. Kitching, “Line shape of the coherent population trapping resonance in the case of a Gaussian spatial profile of a light beam”, Kvantovaya Elektronika, 2022, Volume 52, Number 2,Pages <nobr>105

Selection of papers presented at the IX international Symposium 'Modern Problems of laser physics', Novosibirsk, 23-29 August 2021 (Editors and compilers O.N. Prudnikov and A.V. Taichenachev)

Line shape of the coherent population trapping resonance in the case of a Gaussian spatial profile of a light beam

V. I. Yudin^abc, M. Yu. Basalaev^abc, D. V. Kovalenko^ac, A. V. Taichenachev^ac, J. Pollock^de, A. Hansen^df, W. McGehee^d, J. Kitching^de

^a Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk
^b Novosibirsk State Technical University
^c Novosibirsk State University
^d National Institute of Standards and Technology, Boulder, Colorado, USA
^e Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
^f Honeywell Quantum Solutions, Broomfield, Colorado 80021, USA

Abstract: For coherent population trapping (CPT) resonance excited by a bichromatic field in a closed Λ-system, we have obtained an analytical expression for the line shape in the case of a Gaussian profile of the radiation intensity distribution, taking into account the light shift of the reference transition frequency. Due to the spatial inhomogeneity of the light shift, the line shape is asymmetric. The dependence of the shift of the resonance peak position on the light intenisty is investigated.

Keywords: coherent population trapping resonance, light shift, laser spectroscopy, atomic clocks and magnetometers.

Received: 19.10.2021