Share Email Print

Proceedings Paper

Multiwave mixing and soliton-like spatial structures in photorefractive crystals
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

A theoretical model has been developed for multiwave mixing in media with photorefractive nonlinearity, making it possible to describe the process of interaction between the waves in the conditions exhibiting nonlinearities of different orders with due regard for the mixing geometry. Theoretically, the process of N-wave mixing at the N - 1th-order nonlinearity has been described with the help of a band model for the photorefractive nonlinearity mechanism that includes the transitions from impurity levels within the band gap and enables description of the diffusion or drift processes in the external electric field. The energy efficiency of multiwave mixing and geometric parameters of spatial solitons in photorefractive Bi12TiO20 crystals in the conditions of pulsed and continuous laser excitation have been studied experimentally. It has been found that switching-on of the photorefractive nonlinearity mechanism with 532 nmwavelength laser pulses requires a time interval in excess of 20 - 50 ns, with saturation beyond 80 ns. The formation dynamics of spatial solitons in photorefractive Bi12TiO20 crystals has been analyzed with the use of continuous-wave radiation of a He-Ne laser. It has been determined that the formation conditions and dynamics are influenced by a number of factors including the geometry of radiation input into a crystal, power of the light beam, orientation of its polarization in the directions of the crystal axes, applied electric field and its direction.

Paper Details

Date Published: 5 October 2005
PDF: 8 pages
Proc. SPIE 5949, Nonlinear Optics Applications, 59491P (5 October 2005);
Show Author Affiliations
A. L Tolstik, Belarusian State Univ. (Belarus)
N. G. Borzdov, Belarusian State Univ. (Belarus)
A. Yu. Matusevich, Belarusian State Univ. (Belarus)
E. A. Melnikova, Belarusian State Univ. (Belarus)
A. P. Sukhorukov, Moscow State Univ. (Russia)

Published in SPIE Proceedings Vol. 5949:
Nonlinear Optics Applications
Miroslaw A. Karpierz; Allan Dawson Boardman; George I. Stegeman, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?