Title

Gradient of refractive index (GRIN) effect in photo-thermo-refractive glass

Authors

Authors

J. Lumeau;L. B. Glebov

Comments

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Abbreviated Journal Title

Appl. Optics

Keywords

KINETICS; Optics

Abstract

Photo-thermo-refractive (PTR) glass is a photosensitive multicomponent silicate glass containing photosensitive agents such as cerium and silver. Photoinduced crystalline phase precipitation results in refractive index variations in exposed areas of PTR glass, which has been successfully used for phase hologram recording. Photosensitivity being the result of the partial absorption of the exposing radiation by cerium ions, it results in a gradient of refractive index (GRIN) along the exposure beam propagation. This GRIN is a parasitic effect that deteriorates the parameters of some types of volume Bragg gratings because of the beam deflection they produce. In this paper, the evolution of GRIN is investigated as a function of the dosage of UV exposure and the thermal treatment duration. We show that GRIN is a deterministic process that can be easily modeled and predicted using basic optics and glass science equations. (C) 2015 Optical Society of America

Journal Title

Applied Optics

Volume

54

Issue/Number

7

Publication Date

1-1-2015

Document Type

Article

Language

English

First Page

1587

Last Page

1593

WOS Identifier

WOS:000350263000004

ISSN

1559-128X

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