Title

Photosensitive holographic glass - new approach to creation of high power lasers

Authors

Authors

L. B. Glebov

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

A photosensitive glass demonstrating refractive index decrement after exposure to UV radiation followed by thermal development is used for phase volume hologram recording. This photo-thermo-refractive (PTR) glass is a sodium zinc aluminium silicate glass doped with cerium, silver and fluorine. Spatial modulation of refractive index resulted from precipitation of nanocrystalline phase of sodium fluoride. Volume Bragg gratings recorded in this glass, show extremely narrow spectral and angular selectivity and have low losses combined with high tolerance to laser radiation. These gratings possess a unique ability to produce laser beam transformations directly in angular space. This feature paves a way to creation of high power semiconductor lasers with stable narrow emission spectra and diffraction limited divergence. This approach is based on three types of holographic optical elements made from PTR glass. They are an output coupler providing single transverse mode oscillation for broad area emitters, a phase coupling clement providing coherent emission from a number of spatially separated lasers, and a spectral beam combiner summarising a number of laser beams with different wavelengths within a single beam with diffraction limited divergence.

Journal Title

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

Volume

48

Issue/Number

3

Publication Date

1-1-2007

Document Type

Article; Proceedings Paper

Language

English

First Page

123

Last Page

128

WOS Identifier

WOS:000248619900006

ISSN

1753-3562

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