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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 28 — Oct. 1, 1998
  • pp: 6627–6635

Confocal, two-photon laser-induced fluorescence technique for the detection of nitric oxide

Mark Reeves, Mark Musculus, and Patrick Farrell  »View Author Affiliations


Applied Optics, Vol. 37, Issue 28, pp. 6627-6635 (1998)
http://dx.doi.org/10.1364/AO.37.006627


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Abstract

We describe a confocal two-photon laser-induced fluorescence scheme for the detection of gaseous NO. Excitation from a simple YAG-pumped Coumarin 450 dye system near 452.6 nm was used to promote the two-photon NO(A2+, ν′ = 0 ← X2Π, ν″ = 0) transition in the γ(0, 0) band. Subsequent fluorescence detection in the range 200–300 nm permitted almost total rejection of elastic and geometric scatter of laser radiation for excellent signal/noise ratio characteristics. The goal of the research was to apply NO fluorescence to a relatively realistic limited optical access combustion environment. A confocal optical arrangement was demonstrated for single-point measurements of NO concentration in gas samples and in atmospheric-pressure flames. The technique is suitable for applications that offer only a single direction for optical access and when significant elastic scatter is present.

© 1998 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(300.2530) Spectroscopy : Fluorescence, laser-induced
(300.6410) Spectroscopy : Spectroscopy, multiphoton

History
Original Manuscript: November 3, 1997
Revised Manuscript: March 19, 1998
Published: October 1, 1998

Citation
Mark Reeves, Mark Musculus, and Patrick Farrell, "Confocal, two-photon laser-induced fluorescence technique for the detection of nitric oxide," Appl. Opt. 37, 6627-6635 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-28-6627

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