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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 23 — Dec. 1, 2009
  • pp: 3755–3757

Picosecond time-resolved pure-rotational coherent anti-Stokes Raman spectroscopy for N 2 thermometry

Thomas Seeger, Johannes Kiefer, Alfred Leipertz, Brian D. Patterson, Christopher J. Kliewer, and Thomas B. Settersten  »View Author Affiliations

Optics Letters, Vol. 34, Issue 23, pp. 3755-3757 (2009)

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Time-resolved pure-rotational coherent anti-Stokes Raman spectroscopy using picosecond-duration laser pulses is investigated for gas thermometry. The use of picosecond laser pulses significantly reduces background caused by scattering of the probe beam, and delayed probing of the Raman coherence enables elimination of interference from nonresonant four-wave mixing processes. Temperatures inferred from rotational spectra are sensitive to the probe delay because of the rotational-level dependence of collisional dephasing of Raman coherences. The sensitivity decreases, however, with increasing temperature, and accurate temperature measurements in a flame are demonstrated using a standard frequency-domain analysis of the spectra.

© 2009 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.6780) Instrumentation, measurement, and metrology : Temperature
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(300.6230) Spectroscopy : Spectroscopy, coherent anti-Stokes Raman scattering
(300.6290) Spectroscopy : Spectroscopy, four-wave mixing
(320.5390) Ultrafast optics : Picosecond phenomena

ToC Category:

Original Manuscript: September 9, 2009
Revised Manuscript: October 19, 2009
Manuscript Accepted: October 19, 2009
Published: November 30, 2009

Thomas Seeger, Johannes Kiefer, Alfred Leipertz, Brian D. Patterson, Christopher J. Kliewer, and Thomas B. Settersten, "Picosecond time-resolved pure-rotational coherent anti-Stokes Raman spectroscopy for N2 thermometry," Opt. Lett. 34, 3755-3757 (2009)

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