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Q: Fachverband Quantenoptik und Photonik

Q 26: Poster Ultrakurze Laserpulse

Q 26.5: Poster

Tuesday, March 11, 2008, 16:30–19:00, Poster C1

Analytical theory for the propagation of laser beams in nonlinear media — •Larisa Tatarinova and Marin Garcia — University of Kassel, Kassel, Germany

The propagation of a laser beam of intensity I in a nonlinear media with a refraction index n(I) of arbitrary form is studied. In particular, the influence of the functional form n=n(I) on self-focusing and self-trapping is investigated. We also explicitly analyze the case of nonlinear self-focusing accompanied by multiphoton ionization. Influence of the spatial beam shape on the self-focusing is investigated. Case of propagation of two pulses with different intensities is studied analytically. For particular, already studied cases we considerably improve the accuracy of the results with respect to previous semi-analytical studies and obtain very good agreement with recent numerical simulations.