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Proceedings Paper

Scanned-wavelength diode laser sensors for harsh environments
Author(s): Jay B. Jeffries; Scott T. Sanders; Xin Zhou; Lin Ma; Daniel Walter Mattison; Ronald K. Hanson
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Paper Abstract

Diode laser absorption offers the possibility of high-speed, robust, and rugged sensors for a wide variety of practical applications. Pressure broadening complicates absorption measurements of gas temperature and species concentrations in high-pressure, high-temperature practical environments. More agile wavelength scanning can enable measurements of temperature and species concentrations in flames and engines as demonstrated by example measurements using wavelength scanning of a single DFB in laboratory flames or a vertical cavity surface emitting laser (VCSEL) in a pulse detonation engine environment. Although the blending of multiple transitions by pressure broadening complicates the atmospheric pressure spectrum of C2H4 fuel, a scanned wavelength strategy enables quantitative measurement of fuel/oxidizer stoichiometry. Wavelength-agile scanning techniques enable high-speed measurements in these harsh environments.

Paper Details

Date Published: 23 September 2002
PDF: 8 pages
Proc. SPIE 4817, Diode Lasers and Applications in Atmospheric Sensing, (23 September 2002); doi: 10.1117/12.452076
Show Author Affiliations
Jay B. Jeffries, Stanford Univ. (United States)
Scott T. Sanders, Stanford Univ. (United States)
Xin Zhou, Stanford Univ. (United States)
Lin Ma, Stanford Univ. (United States)
Daniel Walter Mattison, Stanford Univ. (United States)
Ronald K. Hanson, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 4817:
Diode Lasers and Applications in Atmospheric Sensing
Alan Fried, Editor(s)

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