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Applied Optics

Applied Optics


  • Vol. 37, Iss. 36 — Dec. 20, 1998
  • pp: 8392–8396

Stray light rejection in rotational coherent anti-Stokes Raman spectroscopy by use of a sodium-seeded flame

Joakim Bood, Per-Erik Bengtsson, and Marcus Aldén  »View Author Affiliations

Applied Optics, Vol. 37, Issue 36, pp. 8392-8396 (1998)

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A common experimental problem with rotational coherent anti-Stokes Raman spectroscopy (CARS) is undesired spectral interference that is due to stray light from the primary laser beams. Also, for the most developed approach, dual-broadband rotational CARS, practical measurements often suffer from stray light interference from the narrow-band laser, inasmuch as the CARS signal is produced inherently in the spectral vicinity of the narrow-band laser beam. An optical filter does not provide a sufficiently sharp transmission profile, thus leading to signal loss and spectral distortion of the rotational CARS signal. An atomic filter consisting of a sodium-seeded flame is presented here as a solution to the problem, and its usefulness was demonstrated in dual-broadband rotational CARS experiments.

© 1998 Optical Society of America

OCIS Codes
(190.1900) Nonlinear optics : Diagnostic applications of nonlinear optics
(280.1740) Remote sensing and sensors : Combustion diagnostics
(300.6230) Spectroscopy : Spectroscopy, coherent anti-Stokes Raman scattering
(350.2450) Other areas of optics : Filters, absorption

Original Manuscript: June 24, 1998
Revised Manuscript: September 10, 1998
Published: December 20, 1998

Joakim Bood, Per-Erik Bengtsson, and Marcus Aldén, "Stray light rejection in rotational coherent anti-Stokes Raman spectroscopy by use of a sodium-seeded flame," Appl. Opt. 37, 8392-8396 (1998)

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