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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 14 — Jul. 15, 2010
  • pp: 2430–2432

Hybrid femtosecond/picosecond coherent anti-Stokes Raman scattering for high-speed gas-phase thermometry

Joseph D. Miller, Mikhail N. Slipchenko, Terrence R. Meyer, Hans U. Stauffer, and James R. Gord  »View Author Affiliations


Optics Letters, Vol. 35, Issue 14, pp. 2430-2432 (2010)
http://dx.doi.org/10.1364/OL.35.002430


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Abstract

We demonstrate hybrid femtosecond/picosecond (fs/ps) coherent anti-Stokes Raman scattering for high-speed thermometry in unsteady high-temperature flames, including successful comparisons with a time- and frequency- resolved theoretical model. After excitation of the N 2 vibrational manifold with 100 fs broadband pump and Stokes beams, the Raman coherence is probed using a frequency-narrowed 2.5 ps probe beam that is time delayed to suppress the nonresonant background by 2 orders of magnitude. Experimental spectra were obtained at 500 Hz in steady and pulsed H 2 –air flames and exhibit a temperature precision of 2.2% and an accuracy of 3.3% up to 2400 K . Strategies for real-time gas-phase thermometry in high-temperature flames are also discussed, along with implications for kilohertz-rate measurements in practical combustion systems.

© 2010 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(300.6230) Spectroscopy : Spectroscopy, coherent anti-Stokes Raman scattering
(300.6530) Spectroscopy : Spectroscopy, ultrafast
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.7150) Ultrafast optics : Ultrafast spectroscopy

ToC Category:
Spectroscopy

History
Original Manuscript: May 12, 2010
Revised Manuscript: June 22, 2010
Manuscript Accepted: June 23, 2010
Published: July 13, 2010

Citation
Joseph D. Miller, Mikhail N. Slipchenko, Terrence R. Meyer, Hans U. Stauffer, and James R. Gord, "Hybrid femtosecond/picosecond coherent anti-Stokes Raman scattering for high-speed gas-phase thermometry," Opt. Lett. 35, 2430-2432 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-14-2430

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