Ultrafast transverse undulation of self-trapped laser beams.
Identifieur interne : 001339 ( Main/Exploration ); précédent : 001338; suivant : 001340Ultrafast transverse undulation of self-trapped laser beams.
Auteurs : S-P Gorza [Belgique] ; M. HaeltermanSource :
- Optics express ; 2008.
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Abstract
The propagation of a self-trapped laser beam in a planar waveguide that exhibits a Kerr nonlinearity and a normal chromatic dispersion is considered. We demonstrate experimentally for the first time to our knowledge that such a beam undergoes an undulation responsible for ultrafast transverse oscillations of its axis. This phenomenon, called ???snake instability???, was predicted theoretically in 1973 by Zakharov and Rubenchik on the basis of a study of the soliton solutions of the hyperbolic nonlinear Schr odinger equation. The signature of this instability is observed in the spatially resolved temporal spectrum.
PubMed: 18852801
Affiliations:
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