Dynamic Continuous-Wave Spectroscopy of Coherent Population Trapping at Phase-Jump Modulation

M. Yu. Basalaev, V.I. Yudin, A.V. Taichenachev, M.I. Vaskovskaya, D.S. Chuchelov, S.A. Zibrov, V.V. Vassiliev, and V.L. Velichansky

Phys. Rev. Applied 13, 034060 – Published 24 March 2020

Abstract

A method of dynamic continuous-wave spectroscopy of coherent population trapping (CPT) resonances using phase modulation of the jump type is developed. The time evolution of the spectroscopic signal is investigated. A method for the formation of an error signal for frequency stabilization is proposed. We show that our approach has a reduced sensitivity to the line-shape asymmetry of the CPT resonance. The experimental results are in good qualitative agreement with theoretical predictions based on a mathematical model of a three-level $Λ$ system in a bichromatic field. This method can be used in atomic frequency standards (including chip-scale atomic clocks).

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Received 16 October 2019
Revised 18 February 2020
Accepted 28 February 2020

DOI:https://doi.org/10.1103/PhysRevApplied.13.034060

Physics Subject Headings (PhySH)

Atomic, optical & lattice clocks Coherent population trapping Laser spectroscopy Metrology Time & frequency standards

Atomic gases VCSELs

Laser techniques

Atomic, Molecular & Optical

Authors & Affiliations

M. Yu. Basalaev ^1,2,3, V.I. Yudin ^1,2,3,*, A.V. Taichenachev^1,2, M.I. Vaskovskaya ^4,†, D.S. Chuchelov ⁴, S.A. Zibrov⁴, V.V. Vassiliev⁴, and V.L. Velichansky^4,5

¹Institute of Laser Physics SB RAS, pr. Akademika Lavrent’eva 15B, Novosibirsk 630090, Russia
²Novosibirsk State University, ul. Pirogova 1, Novosibirsk 630090, Russia
³Novosibirsk State Technical University, pr. Karla Marksa 20, Novosibirsk 630073, Russia
⁴Lebedev Physical Institute RAS, Leninskiy pr. 53, Moscow 119991, Russia
⁵National Research Nuclear University MEPhI, Kashirskoye Highway 31, Moscow 115409, Russia

^*viyudin@mail.ru
^†vaskovskayami@lebedev.ru

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Vol. 13, Iss. 3 — March 2020

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Physical Review Applied