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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 35, Iss. 12 — Jun. 15, 2010
  • pp: 2040–2042

Suppression of Raman-resonant interferences in rotational coherent anti-Stokes Raman spectroscopy using time-delayed picosecond probe pulses

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


Optics Letters, Vol. 35, Issue 12, pp. 2040-2042 (2010)
http://dx.doi.org/10.1364/OL.35.002040


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Abstract

We measure time-dependent pure-rotational coherent anti-Stokes Raman spectroscopy (CARS) spectra for room-temperature N 2 , O 2 , CO 2 , C 2 H 4 , and C 3 H 8 , as well as in a C 3 H 8 diffusion flame, using picosecond lasers. Because Raman coherences for N 2 and O 2 persist significantly longer than those for the other species, delayed probing can significantly reduce unwanted resonant contributions to rotational coherent anti-Stokes Raman spectroscopy spectra, enabling temperature and relative O 2 / N 2 concentration determination in fuel-rich gas mixtures. Delayed probing also eliminates interference from smeared vibrational CARS. Probe delay affects both the temperature and relative O 2 / N 2 concentrations inferred from rotational spectra when using a standard frequency-domain analysis.

© 2010 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:
Spectroscopy

History
Original Manuscript: April 6, 2010
Manuscript Accepted: May 11, 2010
Published: June 9, 2010

Citation
Thomas Seeger, Johannes Kiefer, Yi Gao, Brian D. Patterson, Christopher J. Kliewer, and Thomas B. Settersten, "Suppression of Raman-resonant interferences in rotational coherent anti-Stokes Raman spectroscopy using time-delayed picosecond probe pulses," Opt. Lett. 35, 2040-2042 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-12-2040


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References

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