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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 6 — Feb. 20, 2003
  • pp: 1115–1121

Infrared 7.6-μm lead-salt diode laser heterodyne radiometry of water vapor in a CH4-air premixed flat flame

Damien Weidmann and Daniel Courtois  »View Author Affiliations


Applied Optics, Vol. 42, Issue 6, pp. 1115-1121 (2003)
http://dx.doi.org/10.1364/AO.42.001115


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Abstract

We deal with the design of a diode laser heterodyne radiometer and its application in a combustion process. We present some experimental results obtained with a CH4-air premixed flat flame as the optical source. The goal is to prove that heterodyne detection techniques are relevant in remote detection and diagnostics of combustion and can have important applications in both civil and military fields. To the best of our knowledge, it is the first time that this demonstration is made. The radiometer, in spite of the low-power lead-salt diode laser used as a local oscillator, enables us to record high-temperature water-vapor emission spectra in the region of 1315 cm-1.

© 2003 Optical Society of America

OCIS Codes
(280.2470) Remote sensing and sensors : Flames
(280.3420) Remote sensing and sensors : Laser sensors
(300.2140) Spectroscopy : Emission
(300.6310) Spectroscopy : Spectroscopy, heterodyne
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6340) Spectroscopy : Spectroscopy, infrared

History
Original Manuscript: March 19, 2002
Revised Manuscript: November 4, 2002
Published: February 20, 2003

Citation
Damien Weidmann and Daniel Courtois, "Infrared 7.6-μm lead-salt diode laser heterodyne radiometry of water vapor in a CH4-air premixed flat flame," Appl. Opt. 42, 1115-1121 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-6-1115

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