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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 6 — Feb. 20, 2001
  • pp: 821–828

In situ combustion measurements of CO2 by use of a distributed-feedback diode-laser sensor near 2.0 µm

Michael E. Webber, Suhong Kim, Scott T. Sanders, Douglas S. Baer, Ronald K. Hanson, and Yuji Ikeda  »View Author Affiliations


Applied Optics, Vol. 40, Issue 6, pp. 821-828 (2001)
http://dx.doi.org/10.1364/AO.40.000821


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Abstract

High-resolution absorption measurements of CO2 were made in a heated static cell and in the combustion region above a flat-flame burner for the development of an in situ CO2 combustion diagnostic based on a distributed-feedback diode laser operating near 2.0 µm. Calculated absorption spectra of high-temperature H2O and CO2 were used to find candidate transitions for CO2 detection, and the R(50) transition at 1.997 µm (the ν1 + 2ν2 + ν3 band) was selected on the basis of its line strength and its isolation from interfering high-temperature water absorption. Measurements of spectroscopic parameters such as the line strength, the self-broadening coefficient, and the line position were made for the R(50) transition, and an improved value for the line strength is reported. The combustion-product populations of CO2 in the combustion region above a flat-flame burner were determined in situ to verify the measured spectroscopic parameters and to demonstrate the feasibility of the diode-laser sensor.

© 2001 Optical Society of America

OCIS Codes
(280.1740) Remote sensing and sensors : Combustion diagnostics
(300.6260) Spectroscopy : Spectroscopy, diode lasers

History
Original Manuscript: May 23, 2000
Revised Manuscript: August 28, 2000
Published: February 20, 2001

Citation
Michael E. Webber, Suhong Kim, Scott T. Sanders, Douglas S. Baer, Ronald K. Hanson, and Yuji Ikeda, "In situ combustion measurements of CO2 by use of a distributed-feedback diode-laser sensor near 2.0 µm," Appl. Opt. 40, 821-828 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-6-821

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