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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 2 — Jan. 15, 2012
  • pp: 229–231

High-spatial-resolution one-dimensional rotational coherent anti-Stokes Raman spectroscopy imaging using counterpropagating beams

Christopher J. Kliewer  »View Author Affiliations


Optics Letters, Vol. 37, Issue 2, pp. 229-231 (2012)
http://dx.doi.org/10.1364/OL.37.000229


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Abstract

A counterpropagating phase-matching geometry is employed for high-spatial-resolution one-dimensional (1D) imaging of temperature and O2-to-N2 concentration ratio using picosecond pure-rotational coherent anti-Stokes Raman spectroscopy (RCARS) over a large field (20 mm). A single-shot 1D RCARS image of more than 20 mm in length is thus acquired at 300 K in air. High-resolution 1D RCARS flame measurements are demonstrated using a custom-built burner and a premixed methane/air flame (Φ=0.6). This phase-matching scheme improves the spatial resolution by approximately 1 order of magnitude when compared to the standard small-angle BOXCARS phase-matching schemes typically employed in CARS measurements. Additionally, for a 20 mm 1D image, signal levels are increased by 102 because of the higher irradiance provided in the current scheme.

© 2012 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:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: October 27, 2011
Revised Manuscript: November 17, 2011
Manuscript Accepted: November 25, 2011
Published: January 13, 2012

Citation
Christopher J. Kliewer, "High-spatial-resolution one-dimensional rotational coherent anti-Stokes Raman spectroscopy imaging using counterpropagating beams," Opt. Lett. 37, 229-231 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-2-229

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