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Proceedings Paper

Beam self-trapping in a BCT crystal
Author(s): V. Matusevich; A. Kiessling; R. Kowarschik; A. E. Zagorskiy; V. V. Shepelevich
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Paper Abstract

We present some aspects of wave self-focusing and self-defocusing in a photorefractive Ba0.77Ca0.23TiO3 (BCT) crystal without external electric field and without background illumination. The effects depend on the cross-section of the input beam. We show that by decreasing of the diameter of the input beam from 730 μm the fanning effect disappears at 150 μm. A symmetrical self-focusing is observed for input diameters from 150 um down to 40 μm and a symmetrical self-defocusing for input diameters from 40 μm down to 20 μm. The 1D self-trapping is detected at 65 μm in BCT. Light power and wavelength are correspondingly 3 mW and 633 nm. The experimental results are supplemented with numerical calculations based on both photovoltaic model and model of screening soliton.

Paper Details

Date Published: 20 January 2006
PDF: 10 pages
Proc. SPIE 6027, ICO20: Optical Information Processing, 60270D (20 January 2006); doi: 10.1117/12.667744
Show Author Affiliations
V. Matusevich, Friedrich-Schiller-Univ. Jena (Germany)
A. Kiessling, Friedrich-Schiller-Univ. Jena (Germany)
R. Kowarschik, Friedrich-Schiller-Univ. Jena (Germany)
A. E. Zagorskiy, Mozyr State Pedagogical Univ. (Belarus)
V. V. Shepelevich, Mozyr State Pedagogical Univ. (Belarus)

Published in SPIE Proceedings Vol. 6027:
ICO20: Optical Information Processing
Yunlong Sheng; Songlin Zhuang; Yimo Zhang, Editor(s)

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