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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 20, Iss. 11 — Jun. 1, 1981
  • pp: 1941–1947

Measurements of DF laser absorption by methane using an intracavity spectrophone

D. H. Leslie and G. L. Trusty  »View Author Affiliations


Applied Optics, Vol. 20, Issue 11, pp. 1941-1947 (1981)
http://dx.doi.org/10.1364/AO.20.001941


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Abstract

Absorption coefficient measurements for trace amounts of methane are reported, in a 1-atm argon balance, at seventeen deuterium-fluoride (DF) laser line frequencies. An optoacoustic detector (spectrophone) operating within the DF laser optical cavity yielded a minimum detectable absorption of 0.007 km−1 (7 × 10−8 cm−1) for a 10:1 SNR. Results are compared with previous measurements and with calculated absorption coefficients obtained using the AFGL atmospheric absorption parameter compilations. A 2.5-fold increase in agreement results when the 1980 AFGL methane parameters are used instead of the 1978 parameters.

© 1981 Optical Society of America

Citation
D. H. Leslie and G. L. Trusty, "Measurements of DF laser absorption by methane using an intracavity spectrophone," Appl. Opt. 20, 1941-1947 (1981)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-20-11-1941

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