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Applied Optics

Applied Optics


  • Editor: Glenn D. Boreman
  • Vol. 44, Iss. 31 — Nov. 1, 2005
  • pp: 6616–6626

Hydroxyl tagging velocimetry method optimization: signal intensity and spectroscopy

Lubomir A. Ribarov, Shengteng Hu, Joseph A. Wehrmeyer, and Robert W. Pitz  »View Author Affiliations

Applied Optics, Vol. 44, Issue 31, pp. 6616-6626 (2005)

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The previously demonstrated nonintrusive time-of-flight molecular velocity tagging method, hydroxyl tagging velocimetry (HTV), has shown the capability of operating both at room temperature and in flames. Well-characterized jets of either air (nonreacting cases) or hydrogen–air diffusion flames (reacting cases) are employed. A 7 × 7 OH line grid is generated first through the single-photon photodissociation of H2O by a ~193 nm pulsed narrowband ArF excimer laser and is subsequently revealed by a read laser sheet through fluorescence caused by A2+(v′ = 3) ← X2Πi(v″ = 0), A2+(v′ = 1) ← X2Πi(v″ = 0), or A2+(v′ = 0) ← X2Πi(v″ = 0) pumping at ~248, ~282, or ~308 nm, respectively. A detailed discussion of the spectroscopy and relative signal intensity of these various read techniques is presented, and the implications for optimal HTV performance are discussed.

© 2005 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(280.1740) Remote sensing and sensors : Combustion diagnostics
(280.2490) Remote sensing and sensors : Flow diagnostics
(280.7250) Remote sensing and sensors : Velocimetry
(300.2530) Spectroscopy : Fluorescence, laser-induced

Original Manuscript: February 7, 2005
Revised Manuscript: June 15, 2005
Manuscript Accepted: June 28, 2005
Published: November 1, 2005

Lubomir A. Ribarov, Shengteng Hu, Joseph A. Wehrmeyer, and Robert W. Pitz, "Hydroxyl tagging velocimetry method optimization: signal intensity and spectroscopy," Appl. Opt. 44, 6616-6626 (2005)

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