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Type of publication: research article
Type of publication (PDB): Straipsnis kitose duomenų bazėse / Article in other databases (S4)
Field of Science: Fizika / Physics (N002)
Author(s): Dementjev, Aleksandr;Girdauskas, Valdas;Vrublevskaja, Oksana;Kazragytė, Renata
Title: Numerical investigation of influence of the nonlinear refraction index upon the second harmonic generation
Other Title: Netiesinio lūžio rodiklio įtakos antrosios harmonikos generacijai skaitinis tyrimas
Is part of: Lietuvos fizikos žurnalas = Lithuanian Journal of Physics = Литовский физический журнал. Vilnius : Fisica, Vol. 42, no. 4 (2002)
Extent: p. 263-273
Date: 2002
Keywords: Netiesinis lūžio rodiklis;Second harmonic generation;Cubic nonlinearity;Self-and cross-phase modulation
Abstract: Results of numerical analysis of the SHG dynamics by short intensive laser pulses in the crystals with the type I interaction are presented. The symmetrical split-step method was used for solution of the set of equations for the slowly varying complex amplitudes for the FH and SH including the group velocity mismatch, the beam diffraction, the phase mismatch, and the cubic nonlinearity of the Kerr-type medium. Applying this method, the main attention was paid to investigation of alteration of the spatio-temporal structure of the FH and the SH pulses, energy converson efficiency, and alteration of the beam propagation factors depending upon the group velocity and phase mismatch and upon diffraction and nonlinear lengths of the FH beam. The energy reconversion influenced by the nonlinear refraction index degrades significantly not only the enrgy conversion efficiency to the SH, but the beam quality as well
Affiliation(s): Fizikos institutas
Fizikos katedra
Gamtos mokslų fakultetas
Vytauto Didžiojo universitetas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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