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Applied Optics

Applied Optics


  • Vol. 37, Iss. 36 — Dec. 20, 1998
  • pp: 8341–8347

Diode-laser absorption measurements of CO2 near 2.0 μm at elevated temperatures

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

Applied Optics, Vol. 37, Issue 36, pp. 8341-8347 (1998)

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A diode-laser sensor system based on absorption spectroscopy techniques has been developed for nonintrusive measurements of CO2 in high-temperature environments. Survey spectra of the CO2 (20°1,04°1)I–00°0 and (20°1,04°1)II–00°0 bands between 1.966 and 2.035 μm (4915–5085 cm-1) were recorded at temperatures between 296 and 1425 K in a heated static cell and compared with calculated spectra (by using the HITRAN 96/HITEMP database) to find candidate transitions for CO2 detection. High-resolution measurements of the CO2R(56) line shape [(20°1,04°1)II–00°0 band] were used to determine the transition line strength, the self-broadening half-width, and the coefficient of temperature dependence of the self-broadening half-width. The results represent what are believed to be the first measurements of CO2 absorption near 2.0 μm with room-temperature diode lasers. Potential applications of the diode-laser sensor system include in situ combustion measurements and environmental monitoring.

© 1998 Optical Society of America

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(280.1740) Remote sensing and sensors : Combustion diagnostics
(300.6260) Spectroscopy : Spectroscopy, diode lasers

Original Manuscript: May 20, 1998
Revised Manuscript: September 15, 1998
Published: December 20, 1998

Radu M. Mihalcea, Douglas S. Baer, and Ronald K. Hanson, "Diode-laser absorption measurements of CO2 near 2.0 μm at elevated temperatures," Appl. Opt. 37, 8341-8347 (1998)

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