Research output: Contribution to journal › Article › peer-review
Two-frequency sub-Doppler spectroscopy of the caesium D1 line in various configurations of counterpropagating laser beams. / Brazhnikov, D. V.; Ignatovich, S. M.; Mesenzova, I. S. et al.
In: Quantum Electronics, Vol. 50, No. 11, 11.2020, p. 1015-1022.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Two-frequency sub-Doppler spectroscopy of the caesium D1 line in various configurations of counterpropagating laser beams
AU - Brazhnikov, D. V.
AU - Ignatovich, S. M.
AU - Mesenzova, I. S.
AU - Mikhailov, A. M.
AU - Boudot, R.
AU - Skvortsov, M. N.
PY - 2020/11
Y1 - 2020/11
N2 - Sub-Doppler resonances in caesium vapours are studied in a laser field produced by counterpropagating two-frequency light beams with mutually orthogonal linear polarisations. The beams are in resonance with optical transitions in the D1 line, the frequency difference of the field spectral components being equal to the hyperfine ground-state splitting in the Cs atom (~9.2 GHz). It has already been shown that in this configuration, the hypercontrast effect can be observed for sub-Doppler resonances, which makes this configuration promising for the employment in new-generation miniature optical frequency standards. In the present work, two different two-frequency configurations are compared with each other and with the single-frequency configuration widely used in practice for observing saturated absorption resonances. The parameters of nonlinear resonances are measured at various temperatures of caesium vapours and at different optical field intensities. The results of the investigations performed make it possible to find an optimal two-frequency scheme for exciting nonlinear resonances and to estimate a potential of the scheme for its applications in quantum metrology.
AB - Sub-Doppler resonances in caesium vapours are studied in a laser field produced by counterpropagating two-frequency light beams with mutually orthogonal linear polarisations. The beams are in resonance with optical transitions in the D1 line, the frequency difference of the field spectral components being equal to the hyperfine ground-state splitting in the Cs atom (~9.2 GHz). It has already been shown that in this configuration, the hypercontrast effect can be observed for sub-Doppler resonances, which makes this configuration promising for the employment in new-generation miniature optical frequency standards. In the present work, two different two-frequency configurations are compared with each other and with the single-frequency configuration widely used in practice for observing saturated absorption resonances. The parameters of nonlinear resonances are measured at various temperatures of caesium vapours and at different optical field intensities. The results of the investigations performed make it possible to find an optimal two-frequency scheme for exciting nonlinear resonances and to estimate a potential of the scheme for its applications in quantum metrology.
KW - Caesium
KW - Coherent population trapping
KW - Diode lasers
KW - Modulation of laser radiation
KW - Optical frequency standards
KW - Ultra-high resolution spectroscopy
KW - caesium
KW - diode lasers
KW - FIELD
KW - ultra-high resolution spectroscopy
KW - CLOCKS
KW - modulation of laser radiation
KW - FREQUENCY STANDARD
KW - VAPOR
KW - OPTICAL FREQUENCY
KW - optical frequency standards
KW - coherent population trapping
KW - TRANSITIONS
KW - RESONANCES
UR - http://www.scopus.com/inward/record.url?scp=85095701001&partnerID=8YFLogxK
U2 - 10.1070/QEL17433
DO - 10.1070/QEL17433
M3 - Article
AN - SCOPUS:85095701001
VL - 50
SP - 1015
EP - 1022
JO - Quantum Electronics
JF - Quantum Electronics
SN - 1063-7818
IS - 11
ER -
ID: 25864200