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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 36 — Dec. 20, 2007
  • pp: 8635–8640

OH absorption spectroscopy in a flame using spatial heterodyne spectroscopy

Renata J. Bartula, Jaal B. Ghandhi, Scott T. Sanders, Edwin J. Mierkiewicz, Fred L. Roesler, and John M. Harlander  »View Author Affiliations

Applied Optics, Vol. 46, Issue 36, pp. 8635-8640 (2007)

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We demonstrate measurements of OH absorption spectra in the post-flame zone of a McKenna burner using spatial heterodyne spectroscopy (SHS). SHS permits high-resolution, high-throughput measurements. In this case the spectra span 308 310 nm with a resolution of 0.03 nm , even though an extended source (extent of 2 × 10 7 m 2 rad 2 ) was used. The high spectral resolution is important for interpreting spectra when multiple absorbers are present for inferring accurate gas temperatures from measured spectra and for monitoring weak absorbers. The present measurement paves the way for absorption spectroscopy by SHS in practical combustion devices, such as reciprocating and gas-turbine engines.

© 2007 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(260.7190) Physical optics : Ultraviolet
(280.1740) Remote sensing and sensors : Combustion diagnostics
(300.6190) Spectroscopy : Spectrometers
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms
(110.3175) Imaging systems : Interferometric imaging

ToC Category:

Original Manuscript: August 29, 2007
Revised Manuscript: October 23, 2007
Manuscript Accepted: October 24, 2007
Published: December 19, 2007

Renata J. Bartula, Jaal B. Ghandhi, Scott T. Sanders, Edwin J. Mierkiewicz, Fred L. Roesler, and John M. Harlander, "OH absorption spectroscopy in a flame using spatial heterodyne spectroscopy," Appl. Opt. 46, 8635-8640 (2007)

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