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Proceedings Paper

Complete Bragg diffraction and high two-beam coupling net gain in a photorefractive polymer
Author(s): Boris L. Volodin; Klaus Meerholz; - Sandalphon; Nasser Peyghambarian
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Paper Abstract

Photorefractive (PR) polymers are a new class of PR materials in which large (approximately 10-3) photoinduced refractive index changes can be generated with very low light power density (approximately 100 mW/cm2 or less). They offer structural flexibility, ease of processing and lower cost compared with commonly used inorganic PR crystals. We have developed a PR polymer composite with significantly enhanced performance compared with the existing PR polymers: for the first time, complete diffraction of an incident beam into the first (Bragg) diffraction order was observed in a 105 micrometers thick layer of a PR polymer. Absorption and reflection losses limit the measured maximum diffraction efficiency to 86%. The material also exhibits a net two-beam coupling gain of more than 200 cm-1. These results show that this class of materials presents a good practical alternative to the inorganic PR crystals.

Paper Details

Date Published: 23 September 1994
PDF: 9 pages
Proc. SPIE 2285, Nonlinear Optical Properties of Organic Materials VII, (23 September 1994); doi: 10.1117/12.187539
Show Author Affiliations
Boris L. Volodin, Univ. of Arizona (United States)
Klaus Meerholz, Univ. of Arizona (Germany)
- Sandalphon, Univ. of Arizona (United States)
Nasser Peyghambarian, Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 2285:
Nonlinear Optical Properties of Organic Materials VII
Gustaaf R. Moehlmann, Editor(s)

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