Photosensitivity In Germane-Silicate Sol-Gel Thin-Films

    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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