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Proceedings Paper

Development of a probe for in-situ measurements of major species in a pool fire using multiplexed near-IR TDLAS
Author(s): Philip J. Santangelo; Peter D. Ludowise; Christopher R. Shaddix; Sarah W. Allendorf; David K. Ottesen; J. R. Ross; Howard A. Johnsen; Gary L. Hubbard
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Paper Abstract

In this paper we discuss the development of a tunable diode laser absorption spectroscopy probe to simultaneously measure, in situ concentrations of 4 major species (CO, C2H2, CH4, and H2O) and the gas phase temperature in a pool fire. The difficulty in making these types of measurements is intrinsic to the environment itself. A large fire is composed of very hot (> 1000 K), turbulent gases and highly radiating and absorbing soot particles. Fiber optic cables are used to transport laser radiation into the fire via a water-cooled probe. This paper focuses on probe design issues, such as the optimization of open path, multipass optics for a turbulent, particulate- laden flow, and the application of high-frequency wavelength modulation spectroscopy to frequency-domain multiplexing of diode lasers.

Paper Details

Date Published: 25 October 1999
PDF: 10 pages
Proc. SPIE 3758, Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Processing Monitoring II, (25 October 1999); doi: 10.1117/12.366454
Show Author Affiliations
Philip J. Santangelo, Sandia National Labs. (United States)
Peter D. Ludowise, Sandia National Labs. (United States)
Christopher R. Shaddix, Sandia National Labs. (United States)
Sarah W. Allendorf, Sandia National Labs. (United States)
David K. Ottesen, Sandia National Labs. (United States)
J. R. Ross, Sandia National Labs. (United States)
Howard A. Johnsen, Sandia National Labs. (United States)
Gary L. Hubbard, Sandia National Labs. (United States)


Published in SPIE Proceedings Vol. 3758:
Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Processing Monitoring II
Alan Fried, Editor(s)

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