Spontaneous and photo-induced crystallisation of photo-thermo-refractive glass

    Authors

    J. Lumeau; A. Sinitskii; L. Glebova; L. B. Glebov;E. D. Zanotto

    Comments

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    Abbreviated Journal Title

    Phys. Chem. Glasses-Eur. J. Glass Sci. Technol. Part B

    Keywords

    Chemistry, Physical; Materials Science, Ceramics

    Abstract

    Photo-thermo-refractive (PTR) glass is suitable for phase hologram recording resulting from photo-thermo-induced precipitation of a sodium fluoride crystalline phase. A detailed knowledge of its properties is necessary for the successful development of optical components. In this paper we present a systematic DSC and spectroscopy study of several (nominally identical) PTR glass melts. These studies revealed that when these glasses are nucleated at temperatures higher than 480 degrees C, the crystallisation peak shifts down to 650 degrees C. For the samples previously ultraviolet exposed and nucleated in the same conditions the crystallisation peak shifts down to 600 degrees C and in both samples another peak appears at 625 degrees C. Thus photo-exposure clearly catalyses crystallisation. It was also found that absorption band of the ultraviolet exposed samples moves from 410 to 485 nm. This shift is tentatively associated with the creation of silver bromide nuclei. Experiments with a ultraviolet exposed bromine-free glass did not show any crystallisation peak up to 720 degrees C, and no absorption peak shift occurred in case of irradiated samples.

    Journal Title

    Physics and Chemistry of Glasses-European Journal of Glass Science and Technology Part B

    Volume

    48

    Issue/Number

    4

    Publication Date

    1-1-2007

    Document Type

    Article; Proceedings Paper

    Language

    English

    First Page

    281

    Last Page

    284

    WOS Identifier

    WOS:000249272500014

    ISSN

    1753-3562

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