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Title: Effect of optical activity on propagation of two-dimensional spatial solitons in cubic photorefractive crystals

Abstract

The self-focusing of two-dimensional Gaussian beams in cubic photorefractive optically active crystals of the (1-bar 1-bar 0) cut in the external electric field arbitrarily oriented in the cut plane is theoretically studied. The ranges of orientation of the external electric field are found in which the divergence of the light beam is smaller than the diffraction divergence. The dependences illustrating the existence of two-dimensional spatial solitons in a 15-mm-thick Bi{sub 12}SiO{sub 20} crystal are constructed taking into account the optical activity or neglecting it. The shape of a light beam propagating in the crystal is determined. (nonlinear optical phenomena)

Authors:
;  [1]; ; ;  [2]
  1. N K Krupskaya Mozyr State Pedagogical University, Mozyr (Belarus)
  2. Friedrich-Schiller-Universitaet Jena, Jena (Germany)
Publication Date:
OSTI Identifier:
21466639
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 37; Journal Issue: 4; Other Information: DOI: 10.1070/QE2007v037n04ABEH013377
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CRYSTALS; CUBIC LATTICES; DIFFRACTION; ELECTRIC FIELDS; FOCUSING; OPTICAL ACTIVITY; PHOTON BEAMS; REFRACTION; SOLITONS; TWO-DIMENSIONAL CALCULATIONS; VISIBLE RADIATION; BEAMS; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; ELECTROMAGNETIC RADIATION; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; QUASI PARTICLES; RADIATIONS; SCATTERING

Citation Formats

Shepelevich, V V, Zagorskii, A E, Kowarschik, R, Kiessling, A, and Matusevich, V. Effect of optical activity on propagation of two-dimensional spatial solitons in cubic photorefractive crystals. United States: N. p., 2007. Web. doi:10.1070/QE2007V037N04ABEH013377.
Shepelevich, V V, Zagorskii, A E, Kowarschik, R, Kiessling, A, & Matusevich, V. Effect of optical activity on propagation of two-dimensional spatial solitons in cubic photorefractive crystals. United States. doi:10.1070/QE2007V037N04ABEH013377.
Shepelevich, V V, Zagorskii, A E, Kowarschik, R, Kiessling, A, and Matusevich, V. Mon . "Effect of optical activity on propagation of two-dimensional spatial solitons in cubic photorefractive crystals". United States. doi:10.1070/QE2007V037N04ABEH013377.
@article{osti_21466639,
title = {Effect of optical activity on propagation of two-dimensional spatial solitons in cubic photorefractive crystals},
author = {Shepelevich, V V and Zagorskii, A E and Kowarschik, R and Kiessling, A and Matusevich, V},
abstractNote = {The self-focusing of two-dimensional Gaussian beams in cubic photorefractive optically active crystals of the (1-bar 1-bar 0) cut in the external electric field arbitrarily oriented in the cut plane is theoretically studied. The ranges of orientation of the external electric field are found in which the divergence of the light beam is smaller than the diffraction divergence. The dependences illustrating the existence of two-dimensional spatial solitons in a 15-mm-thick Bi{sub 12}SiO{sub 20} crystal are constructed taking into account the optical activity or neglecting it. The shape of a light beam propagating in the crystal is determined. (nonlinear optical phenomena)},
doi = {10.1070/QE2007V037N04ABEH013377},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 4,
volume = 37,
place = {United States},
year = {Mon Apr 30 00:00:00 EDT 2007},
month = {Mon Apr 30 00:00:00 EDT 2007}
}
  • The self-focusing of Gaussian light beams and the propagation of screening spatial solitons in a cubic optically active photorefractive crystal with the (1-bar 1-bar 0) cut plane are studied for an arbitrary orientation of an external electric field in this plane. A change in the rotation of the polarisation plane caused by the nonlinear interaction of light with the crystal is studied theoretically. It is shown that optical activity enhances self-focusing in some cases. Screening self-focusing was observed in an incoherently illuminated Bi{sub 12}SiO{sub 20} crystal without additional laser irradiation. The experimental data well agree with the proposed theoretical model.more » (nonlinear optical phenomena)« less
  • The coherent interaction of Gaussian light beams polarised parallel to the [1bar10] direction in a cubic optically active photorefractive crystal with the [1-barbar1 1-bar 0] cut is studied in an electric field applied to the crystal in the [0 0 1-bar] direction. The effect of optical activity on the interaction of the light beams with the phase difference {Delta}=0, {pi}/2, and {pi} is theoretically studied. It is shown that, while a change in the intensity of a combined light beam at {Delta}=0 caused by the influence of optical activity in a 9-mm thick Bi{sub 12}TiO{sub 20} crystal is comparatively smallmore » (less than 8%), this change achieves 36% in the crystal of thickness 18 mm. The interaction of orthogonally polarised beams in this crystal is considered. It is found that, although the optical activity of the crystal results in the appearance of the 'breathing effect', a soliton-like nature of the combined beam is preserved. The results obtained can be used for the address positioning of soliton-like light beams. (nonlinear optical phenomena)« less
  • We provide a theory for spatial solitons due to the two-photon photorefractive effect based on the Castro-Camus model [Opt. Lett. 28, 1129 (2003)]. We present the evolution equation of one-dimensional spatial solitons in two-photon photorefractive media. In steady state and under appropriate external bias conditions, we obtain the dark and bright soliton solutions of the optical wave evolution equation, and also discuss the self-deflection of the bright solitons theoretically by taking into account the diffusion effect.
  • The interaction of two counterpropagating light waves on reflection holographic gratings is studied in cubic photorefractive crystals with the natural optical activity. The anisotropy of contributions from intramode (without a change in the refractive index of natural circularly polarised waves) and intermode processes to the interaction of the waves in a bismuth titanate crystal is considered. It is shown that the polarisation dependences of the effective gain and the polarisation vectors of the interacting light beams measured at a wavelength of 633 nm in a (100) cut Bi{sub 12}TiO{sub 20}:Fe, Cu crystal of thickness 2.6 mm well agree with numericalmore » calculations with the use of the two-beam coupling constant equal to 6.8 cm{sup -1}. (nonlinear optical phenomena)« less
  • Edge enhancement, a type of intensity filtering of a two-dimensional optical image, was demonstrated using a high-performance photorefractive polymer-dissolved liquid crystal. We calculated the expected images using Fourier transform holographic geometry and obtained good agreement between the observed images and the theoretical expectation. {copyright} 2001 American Institute of Physics.