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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 6 — Feb. 20, 2009
  • pp: 1237–1248

Development of temperature imaging using two-line atomic fluorescence

Paul R. Medwell, Qing N. Chan, Peter A. M. Kalt, Zeyad T. Alwahabi, Bassam B. Dally, and Graham J. Nathan  »View Author Affiliations


Applied Optics, Vol. 48, Issue 6, pp. 1237-1248 (2009)
http://dx.doi.org/10.1364/AO.48.001237


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Abstract

This work aims to advance understanding of the coupling between temperature and soot. The ability to image temperature using the two-line atomic fluorescence (TLAF) technique is demonstrated. Previous TLAF theory is extended from linear excitation into the nonlinear fluence regime. Nonlinear regime two-line atomic fluorescence (NTLAF) provides superior signal and reduces single-shot uncertainty from 250 K for conventional TLAF down to 100 K . NTLAF is shown to resolve the temperature profile across the stoichiometric envelope for hydrogen, ethylene, and natural gas flames, with deviation from thermocouple measurements not exceeding 100 K , and typically 30 K . Measurements in flames containing soot demonstrate good capacity of NTLAF to exclude interferences that hamper most two-dimensional thermometry techniques.

© 2009 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.6780) Instrumentation, measurement, and metrology : Temperature
(300.2530) Spectroscopy : Fluorescence, laser-induced

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: November 5, 2008
Revised Manuscript: January 18, 2009
Manuscript Accepted: January 21, 2009
Published: February 20, 2009

Citation
Paul R. Medwell, Qing N. Chan, Peter A. M. Kalt, Zeyad T. Alwahabi, Bassam B. Dally, and Graham J. Nathan, "Development of temperature imaging using two-line atomic fluorescence," Appl. Opt. 48, 1237-1248 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-6-1237

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