Abstract:

The authors demonstrate a technique to optically imprint through linear beam propagation an index pattern in the bulk of a photorefractive crystal capable of beam reshaping and waveguiding. The procedure is based on the separation into two distinct phases of the photosensitive and refractive response, so that light is in all cases undergoing only linear propagation. When saturation in the response becomes dominant, the scheme is able to achieve both one-dimensional and two-dimensional waveguiding. The result allows the straightforward writing of multiwaveguide circuits, where traditional schemes based on spatial solitons are in practice burdened by nonlinearity. [ABSTRACT FROM AUTHOR]Copyright of Applied Physics Letters is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Notes:

Accession Number: 27758753; DelRe, E. 1 Pierangelo, A. 1 Palange, E. 1 Ciattoni, A. 2 Agranat, A. J. 3; Affiliation: 1: Laboratorio di Ottica e Fotonica, Dipartimento di Ingegneria Elettrica e dell’Informazione, Università dell’Aquila, 67040 L’Aquila, Italy 2: Laboratorio Regionale CASTI, INFM-CNR, Dipartimento di Fisica, Università dell’Aquila, 67010 L’Aquila, Italy 3: Department of Applied Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel; Source Info: 8/20/2007, Vol. 91 Issue 8, p081105; Subject Term: PHOTOREFRACTIVE materials; Subject Term: CRYSTALS; Subject Term: WAVEGUIDES; Subject Term: NONLINEAR optics; Subject Term: BEAM dynamics; Number of Pages: 3p; Illustrations: 1 Diagram, 2 Graphs; Document Type: Article