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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 33 — Nov. 20, 1997
  • pp: 8745–8752

Diode laser sensor for measurements of CO, CO2, and CH4 in combustion flows

Radu M. Mihalcea, Douglas S. Baer, and Ronald K. Hanson  »View Author Affiliations


Applied Optics, Vol. 36, Issue 33, pp. 8745-8752 (1997)
http://dx.doi.org/10.1364/AO.36.008745


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Abstract

A diode laser sensor has been applied to monitor CO, CO2, and CH4 in combustion gases with absorption spectroscopy and fast extraction-sampling techniques. Survey spectra of the CO 3ν band (R branch) and the 2ν1 + 2ν20 + ν3 CO2 band (R branch) near 6350 cm−1 and H2O lines from the ν1 + 2ν2 and 2ν2 + ν3 bands in the spectral region from 6345 to 6660 cm−1 were recorded and compared with calculated spectra (from the HITRAN 96 database) to select optimum transitions for species detection. Species concentrations above a laminar, premixed, methane–air flame were determined from measured absorption in a fast-flow multipass absorption cell containing probe-sampled combustion gases; good agreement was found with calculated chemical equilibrium values.

© 1997 Optical Society of America

History
Original Manuscript: January 27, 1997
Revised Manuscript: June 10, 1997
Published: November 20, 1997

Citation
Radu M. Mihalcea, Douglas S. Baer, and Ronald K. Hanson, "Diode laser sensor for measurements of CO, CO2, and CH4 in combustion flows," Appl. Opt. 36, 8745-8752 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-33-8745

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