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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 11 — Nov. 1, 2006
  • pp: 2398–2417

Saturation-dip measurements for the ν 8 C O stretching band of CH 3 OH with a CO 2 -laser–microwave-sideband spectrometer

Zhen-Dong Sun, Ronald M. Lees, and Li-Hong Xu  »View Author Affiliations


JOSA B, Vol. 23, Issue 11, pp. 2398-2417 (2006)
http://dx.doi.org/10.1364/JOSAB.23.002398


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Abstract

Saturation-dip measurements for the ν 8 C O stretching band of CH 3 OH have been systematically carried out with a CO 2 -laser–microwave-sideband spectrometer operating on low- and high- J 9.6 μ m P-branch CO 2 laser lines. Frequencies of nearly 500 spectral lines, including overlapped and doublet lines unresolved in dense Doppler-limited spectra, have been measured with a resolution of 0.4 MHz and absolute accuracy of the order of ± 100 kHz . Over 200 frequency combination loops have been formed from the present and previous sub-Doppler observations, unambiguously confirming the infrared transition assignments, and refined term values have been determined for 623 excited vibrational levels. These results constitute a substantial database of high-accuracy frequency reference standards for CH 3 OH in the 10 μ m region, with applications in frequency calibration, in detailed studies of the complicated methanol intermode vibrational interactions, and in the interpretation of optically pumped far-infrared laser emission.

© 2006 Optical Society of America

OCIS Codes
(300.6190) Spectroscopy : Spectrometers
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6360) Spectroscopy : Spectroscopy, laser
(300.6390) Spectroscopy : Spectroscopy, molecular
(300.6460) Spectroscopy : Spectroscopy, saturation

ToC Category:
Spectroscopy

History
Original Manuscript: June 15, 2006
Manuscript Accepted: July 6, 2006

Citation
Zhen-Dong Sun, Ronald M. Lees, and Li-Hong Xu, "Saturation-dip measurements for the ν8 C-O stretching band of CH3OH with a CO2-laser-microwave-sideband spectrometer," J. Opt. Soc. Am. B 23, 2398-2417 (2006)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-23-11-2398


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References

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