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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 6 — Feb. 20, 2006
  • pp: 1177–1186

Development of multipoint vibrational coherent anti-Stokes Raman spectroscopy for flame applications

Mikael Afzelius, Per-Erik Bengtsson, Joakim Bood, Christian Brackmann, and Alfred Kurtz  »View Author Affiliations


Applied Optics, Vol. 45, Issue 6, pp. 1177-1186 (2006)
http://dx.doi.org/10.1364/AO.45.001177


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Abstract

A novel technique for coherent anti-Stokes Raman spectroscopy (CARS) measurements in multiple points is presented. In a multipass cavity the pump and Stokes laser beams are multiply reflected and refocused into a measurement volume with an adjustable number of separated points along a line. This optical arrangement was used in a vibrational CARS setup with planar BOXCARS phase-matching configuration. The CARS spectra from spatially separated points were recorded at different heights on a CCD camera. Measurements of temperature profiles were carried out in the burned gas zone of a premixed one-dimensional flame to demonstrate the applicability of this method for temperature measurements in high-temperature regions. The ability to measure in flames with strong density gradients was demonstrated by simultaneous measurements of Q-branch spectra of N 2 and CO in a Wolfhard–Parker burner flame. Interference phenomena found in multipoint spectra are discussed, and possible solutions are proposed. Merits and limitations of the technique are discussed.

© 2006 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(300.0300) Spectroscopy : Spectroscopy
(300.6230) Spectroscopy : Spectroscopy, coherent anti-Stokes Raman scattering

ToC Category:
Spectroscopy

History
Original Manuscript: April 28, 2005
Revised Manuscript: September 5, 2005
Manuscript Accepted: September 30, 2005

Citation
Mikael Afzelius, Per-Erik Bengtsson, Joakim Bood, Christian Brackmann, and Alfred Kurtz, "Development of multipoint vibrational coherent anti-Stokes Raman spectroscopy for flame applications," Appl. Opt. 45, 1177-1186 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-6-1177

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