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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 16, Iss. 2 — Feb. 1, 1999
  • pp: 317–322

Far-infrared foreign and self-broadened rotational linewidths of high-temperature water vapor

R. A. Cheville and D. Grischkowsky  »View Author Affiliations


JOSA B, Vol. 16, Issue 2, pp. 317-322 (1999)
http://dx.doi.org/10.1364/JOSAB.16.000317


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Abstract

We report what is believed to be the first measurement of rotational line broadening of high-temperature water vapor for transition frequencies that range from 1.0 to 2.5 THz (33 to 83 cm−1). Water-vapor rotational transitions were measured in a near-stoichiometric propane–air flame at 1490 K with THz time-domain spectroscopy. Linewidths were measured for 29 pure rotational transitions in both ground vibrational and ν2=1 vibrational levels with lower state energies ranging from 80 to 2390 cm−1. Measured widths show a dependence on rotational state energy that roughly follows a thermal distribution with variation between various J, Ka, Kc rotational quantum numbers.

© 1999 Optical Society of America

OCIS Codes
(300.6240) Spectroscopy : Spectroscopy, coherent transient
(300.6270) Spectroscopy : Spectroscopy, far infrared
(300.6390) Spectroscopy : Spectroscopy, molecular
(320.7150) Ultrafast optics : Ultrafast spectroscopy

Citation
R. A. Cheville and D. Grischkowsky, "Far-infrared foreign and self-broadened rotational linewidths of high-temperature water vapor," J. Opt. Soc. Am. B 16, 317-322 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-2-317


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