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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 20, Iss. 14 — Jul. 15, 1981
  • pp: 2539–2554

Phase fluctuation optical heterodyne spectroscopy of gases

Christopher C. Davis and Samuel J. Petuchowski  »View Author Affiliations


Applied Optics, Vol. 20, Issue 14, pp. 2539-2554 (1981)
http://dx.doi.org/10.1364/AO.20.002539


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Abstract

The theory underlying the use of the phase fluctuation optical heterodyne (PFLOH) technique in studies of molecular relaxation, thermal conduction, and extremely weak absorptions in the gas phase is presented. Several new solutions to the heat conduction equation, with and without mass diffusion, which are appropriate to pulsed, cw, and modulated-cw laser modulation of weakly absorbing gases, are presented. Experiments employing pulsed and modulated-cw excitation have borne out the essential predictions of the theory. PFLOH systems for use in a trace detection application have been built with a demonstrated sensitivity, in terms of measurable absorption by the trace material, below 10−10 cm−1.

© 1981 Optical Society of America

History
Original Manuscript: December 26, 1980
Published: July 15, 1981

Citation
Christopher C. Davis and Samuel J. Petuchowski, "Phase fluctuation optical heterodyne spectroscopy of gases," Appl. Opt. 20, 2539-2554 (1981)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-20-14-2539

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