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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 2 — Jan. 15, 2007
  • pp: 184–186

Stimulated Raman X waves in ultrashort optical pulse filamentation

Daniele Faccio, Alessandro Averchi, Audrius Dubietis, Paolo Polesana, Algis Piskarskas, Paolo Di Trapani, and Arnaud Couairon  »View Author Affiliations

Optics Letters, Vol. 32, Issue 2, pp. 184-186 (2007)

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We demonstrate that ultrashort pulse filamentation in liquids with strong Raman gain leads to the spontaneous formation of nonlinear X waves at a Raman-shifted wavelength. We measured as much as 75% energy conversion efficiency into a Raman X wave in ethanol starting from 1 ps pulses due to the group velocity matching between the pump and Raman X pulses. Large Raman gain of a weak seed signal was observed in water, associated with a strong spatiotemporal transformation of the seed into an X wave.

© 2006 Optical Society of America

OCIS Codes
(190.5890) Nonlinear optics : Scattering, stimulated
(190.5940) Nonlinear optics : Self-action effects
(320.2250) Ultrafast optics : Femtosecond phenomena

ToC Category:
Ultrafast Optics

Original Manuscript: September 19, 2006
Revised Manuscript: October 10, 2006
Manuscript Accepted: October 11, 2006
Published: December 23, 2006

Daniele Faccio, Alessandro Averchi, Audrius Dubietis, Paolo Polesana, Algis Piskarskas, Paolo Di Trapani, and Arnaud Couairon, "Stimulated Raman X waves in ultrashort optical pulse filamentation," Opt. Lett. 32, 184-186 (2007)

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