Application of the methane saturated dispersion resonance near 2.36μm over the temperature range of 77–300K for optical frequency standards

Application of the methane saturated dispersion resonance near 2.36μm over the temperature range... New spectroscopic knowledge of the ν1+ν4 R(2) E line of methane over the temperature range 77–300K is reported. Theoretical calculations of the absorption coefficient and the amplitudes of saturated dispersion resonances at 4234cm−1 were derived. The theoretical dependence on the temperature of the amplitudes of the saturated dispersion resonances was obtained. A novel setup based on a Cr2+:ZnSe laser was used for Doppler-free spectroscopy of methane. The amplitudes of the saturated dispersion resonances of the ν1+ν4 R(2) E line of methane were measured experimentally at different temperatures. A comparison with theoretical dependence supports the reliability of the experiment. The obtained results are of immediate interest in applications demanding laser frequency stabilization. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Quantitative Spectroscopy & Radiative Transfer Elsevier

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Publisher
Elsevier
Copyright
Copyright © 2016 Elsevier Ltd
ISSN
0022-4073
eISSN
1879-1352
D.O.I.
10.1016/j.jqsrt.2016.03.002
Publisher site
See Article on Publisher Site

Abstract

New spectroscopic knowledge of the ν1+ν4 R(2) E line of methane over the temperature range 77–300K is reported. Theoretical calculations of the absorption coefficient and the amplitudes of saturated dispersion resonances at 4234cm−1 were derived. The theoretical dependence on the temperature of the amplitudes of the saturated dispersion resonances was obtained. A novel setup based on a Cr2+:ZnSe laser was used for Doppler-free spectroscopy of methane. The amplitudes of the saturated dispersion resonances of the ν1+ν4 R(2) E line of methane were measured experimentally at different temperatures. A comparison with theoretical dependence supports the reliability of the experiment. The obtained results are of immediate interest in applications demanding laser frequency stabilization.

Journal

Journal of Quantitative Spectroscopy & Radiative TransferElsevier

Published: Jul 1, 2016

References

  • Shift and broadening of saturated absorption resonances due to curvature of the laser wave fronts
    Hall, J.L.; Borde, C.J.
  • Optical frequency metrology
    Udem, T.; Holzwarth, R.; Hansch, T.W.
  • Transition moments in infrared active fundamentals of spherical top molecules
    Fox, K.; Person, W.B.
  • Methane line parameters in HITRAN
    Brown, L.R.; Benner, D.C.; Champion, J.P.; Devi, V.M.; Fejard, L.; Gamache, R.R.

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