Title

Photosensitivity In Germane-Silicate Sol-Gel Thin-Films

Authors

Authors

K. D. Simmons; G. I. Stegeman; B. G. Potter;J. H. Simmons

Comments

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Abbreviated Journal Title

J. Non-Cryst. Solids

Keywords

PLANAR WAVE-GUIDES; OPTICAL FIBERS; ABSORPTION; CENTERS; WAVEGUIDES; GRATINGS; FILTERS; GLASS; Materials Science, Ceramics; Materials Science, Multidisciplinary

Abstract

Binary germano-silicate thin-film waveguides were produced by the sol-gel method with 10, 25 and 45 mol% GeO2. Post-deposition, reducing-atmosphere heat treatments were used to induce a variety of photosensitive defects in the films. The waveguides were subsequently exposed to guided counter-propagating beams at 488 nm to seed and grow permanent optical gratings. The mechanisms of defect formation and bleaching following exposure at 488 and at 248 nm are analyzed, and the role of these mechanisms in developing photosensitivity is elucidated. New photo-induced absorptive processes are observed and related to the optical behavior. Models for photosensitivity are reviewed in light of these observations.

Journal Title

Journal of Non-Crystalline Solids

Volume

179

Publication Date

1-1-1995

Document Type

Article; Proceedings Paper

Language

English

First Page

254

Last Page

259

WOS Identifier

WOS:A1994PW79700025

ISSN

0022-3093

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