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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 23 — Dec. 1, 2008
  • pp: 2728–2730

Spectral shift of Raman generation band in a Bessel pump beam

Ruslan Chulkov, Alexander Grabtchikov, Pavel Apanasevich, and Valentin Orlovich  »View Author Affiliations

Optics Letters, Vol. 33, Issue 23, pp. 2728-2730 (2008)

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A spectral shift in the first Stokes generation band has been observed at stimulated Raman scattering in a Bessel light beam. Under nanosecond pulse excitation in barium nitrate crystal, the Stokes emission propagating along the Bessel beam axis has been found to be frequency shifted toward the blue side by 3.7 GHz with respect to the Stokes emission propagating along the surface of a cone. Numerical data have shown that the observed frequency shift is directly related to the contribution of the real part of the Raman susceptibility to the refractive index. This contribution causes an increase in the Stokes gain out of exact Raman resonance owing to induced focusing, which inhibits diffraction spread of generated light and thus provides its better spatial overlap with the pump beam.

© 2008 Optical Society of America

OCIS Codes
(020.3690) Atomic and molecular physics : Line shapes and shifts
(190.4420) Nonlinear optics : Nonlinear optics, transverse effects in
(190.5890) Nonlinear optics : Scattering, stimulated

ToC Category:
Nonlinear Optics

Original Manuscript: June 10, 2008
Revised Manuscript: October 3, 2008
Manuscript Accepted: October 7, 2008
Published: November 18, 2008

Ruslan Chulkov, Alexander Grabtchikov, Pavel Apanasevich, and Valentin Orlovich, "Spectral shift of Raman generation band in a Bessel pump beam," Opt. Lett. 33, 2728-2730 (2008)

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