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Applied Optics

Applied Optics


  • Editor: Glenn D. Boreman
  • Vol. 44, Iss. 31 — Nov. 1, 2005
  • pp: 6786–6795

Frequency-resolved absorption tomography with tunable diode lasers

Reynaldo Villarreal and Philip L. Varghese  »View Author Affiliations

Applied Optics, Vol. 44, Issue 31, pp. 6786-6795 (2005)

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A tunable diode laser was used for absorption tomography in an axisymmetric atmospheric pressure flat-flame burner. A rapid tomographic inversion algorithm was used to facilitate the many reconstructions at a relatively sparse set of projections typical of laser absorption tomography. Profiles of temperature and CO2 mole fraction were measured simultaneously in methane–air flames. Absorption measurements were made near the R-branch bandhead at 4.17 μm to minimize interferences with other species, while providing good temperature and concentration sensitivity at flame conditions. The procedure showed the advantage of reconstructing detailed spectra at each radial node.

© 2005 Optical Society of America

OCIS Codes
(280.1740) Remote sensing and sensors : Combustion diagnostics
(300.1030) Spectroscopy : Absorption
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6390) Spectroscopy : Spectroscopy, molecular

Original Manuscript: February 23, 2005
Revised Manuscript: July 1, 2005
Manuscript Accepted: July 2, 2005
Published: November 1, 2005

Reynaldo Villarreal and Philip L. Varghese, "Frequency-resolved absorption tomography with tunable diode lasers," Appl. Opt. 44, 6786-6795 (2005)

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