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Proceedings Paper

Possibility of control of propagation regime in medium with cubic nonlinearity for chirped femtosecond pulse under the temporal dispersion of nonlinear response
Author(s): Vyacheslav A. Trofimov; Aleksey G. Volkov
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Paper Abstract

This report deals with self-focusing of axial symmetric laser beam in Kerr medium with the temporal dispersion of nonlinear response. Laser beam propagation is described by so-called generalized nonlinear Schrödinger equation in 3D case. The essential feature of this equation is a term, which contains a time derivation from nonlinear response. As a re-sult, a group velocity of wave packet depends on laser pulse intensity. On the other hand, as well known, self-focusing of an axial symmetric laser beam results in unlimited growth of its intensity for the picoseconds diapason of pulse duration. Action of both factors gives a new quality of laser beam propagation. Its main feature is a possibility to control of self-action for chirped laser pulse. Under certain conditions, we can easy to change regime of self-focusing to opposite one. Temporal dispersion of nonlinear response can be the main nonlinear response of medium under the laser light propagation.

Paper Details

Date Published: 15 January 2008
PDF: 7 pages
Proc. SPIE 6985, Fundamentals of Laser Assisted Micro- and Nanotechnologies, 698504 (15 January 2008); doi: 10.1117/12.786939
Show Author Affiliations
Vyacheslav A. Trofimov, Lomonosov Moscow State Univ. (Russia)
Aleksey G. Volkov, Lomonosov Moscow State Univ. (Russia)

Published in SPIE Proceedings Vol. 6985:
Fundamentals of Laser Assisted Micro- and Nanotechnologies

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