Title

Role of bromine on the thermal and optical properties of photo-thermo-refractive glass

Authors

Authors

L. Glebova; J. Lumeau; M. Klimov; E. D. Zanotto;L. B. Glebov

Comments

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Abbreviated Journal Title

J. Non-Cryst. Solids

Keywords

crystal growth; glass ceramics; nucleation; nano-crystals; optical; spectroscopy; secondary ion mass spectrocopy; photo-induced effects; Materials Science, Ceramics; Materials Science, Multidisciplinary

Abstract

Photo-thermo-refractive (PTR) glass is a photosensitive silicate glass doped with cerium, silver, and fluorine. The precipitation of a minor crystalline phase after LTV-exposure and thermal treatment induces a refractive index change, which is large enough to create diffractive optical elements. In this work we present a first attempt to understand the role of bromine on thermal and optical properties of PTR glass. We reveal that at least 75% of the concentration of bromine of commercial PTR glass is necessary to produce photo-induced crystallization. We also show that an increase of the bromine concentration will increase the mean refractive index of virgin PTR glass. Further thermal treatments induce a decrease of the mean refractive index of PTR glass. This decrease is finally shown to be larger in UV-exposed glass if photo-induced crystallization is present. We also show that bromine concentration will decrease water concentration in PTR glass and have an impact on the losses in visible. We demonstrate that the higher the bromine concentration, the higher the shift of the silver containing particles absorption band. In addition, if bromine concentration is high enough to produce photosensitivity, an increase of scattering due to the crystallization process is observed. (C) 2007 Elsevier B.V. All rights reserved.

Journal Title

Journal of Non-Crystalline Solids

Volume

354

Issue/Number

2-9

Publication Date

1-1-2008

Document Type

Article; Proceedings Paper

Language

English

First Page

456

Last Page

461

WOS Identifier

WOS:000252860800066

ISSN

0022-3093

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