Interaction of two-dimensional orthogonally polarised super-Gaussian light beams in a photorefractive crystal
| Autor: | Vladislav Matusevich, R. Kovarshik, V V Davydovskaya, A. Kisling, V. V. Shepelevich |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
Diffraction Optic axis of a crystal business.industry Statistical and Nonlinear Physics Electromagnetic radiation Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Optical axis Optics Electric field Physics::Accelerator Physics Light beam Electrical and Electronic Engineering business Beam (structure) Gaussian beam |
| Zdroj: | Quantum Electronics. 40:899-906 |
| ISSN: | 1468-4799 1063-7818 |
| DOI: | 10.1070/qe2010v040n10abeh014373 |
| Popis: | Propagation and interaction of orthogonally polarised two-dimensional super-Gaussian light beams is studied theoretically in a 4mm-symmetry photorefractive crystal in the drift regime when the external electric field is applied to the crystal in the direction of the optical axis. The output beams displaced with respect to each other in directions parallel and perpendicular to the direction of the external electric field strength vector are considered. It is shown that an auxiliary light beam polarised orthogonally to the fundamental light beam makes it possible to carry out efficiently address localisation of the fundamental beam propagating in a quasi-soliton regime. The crystal thicknesses are found, which are optimal from the viewpoint of maximisation of the fundamental light beam deviation. It is shown that 'square' super-Gaussian beams in the near-field diffraction region are focused at smaller values of the external electric field than those of the Gaussian beams. |
| Databáze: | OpenAIRE |
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