Open AccessNonlinear enhanced-absorption resonances in compact alkali-vapor cells for applications in quantum metrology
Author(s) -
D. V. Brazhnikov,
S. M. Ignatovich,
I. S. Mesenzova,
А. М. Михайлов,
M. A. Skvortsov,
A. N. Goncharov,
В. М. Энтин,
I. I. Ryabtsev,
Rodolphe Boudot,
E. Taskova,
E. Alipieva,
C. Andreeva,
S. Gateva
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1859/1/012019
Subject(s) - laser linewidth , optics , microwave , laser , spectroscopy , atomic physics , physics , magnetometer , magnetic field , quantum mechanics
We review three laser spectroscopy schemes developed recently for observation of high-contrast enhanced-absorption nonlinear resonances in small alkali-vapor cells. In our experiments, optical transitions within the cesium D1 line are involved and a probe beam transmission is analyzed. The first spectroscopy method is based on the configuration with two-frequency counter propagating beams, which are linearly polarized in orthogonal directions. This configuration provides observation of high-contrast natural-linewidth resonances superimposed on broad Doppler profiles when the laser frequency is scanned. These resonances have good prospects for developing a miniature optical frequency reference. The second scheme involves two-frequency counter propagating beams with equal circular polarizations and provides observation of subnatural-linewidth resonances when the Raman frequency detuning is scanned. We use these resonances for stabilizing the microwave frequency of a local oscillator (≈ 4.6 GHz). Frequency stability of around 6 × l0 -12 is achieved at 1-s averaging using a 5-mm length cell. This result makes the technique attractive for developing a miniature frequency standard in thr microwave range. The third configuration exploits single-frequency counter-propagating beams with linear orthogonal polarizations. The ultrahigh-contrast subnatural-linewidth resonances can be observed when the longitudinal magnetic field is scanned around zero. The possible application is discussed of these resonances in vector atomic magnetometry.