Photosensitive holographic glass - new approach to creation of high power lasers
Abbreviated Journal Title
Phys. Chem. Glasses-Eur. J. Glass Sci. Technol. Part B
Chemistry, Physical; Materials Science, Ceramics
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.
Physics and Chemistry of Glasses-European Journal of Glass Science and Technology Part B
Article; Proceedings Paper
"Photosensitive holographic glass - new approach to creation of high power lasers" (2007). Faculty Bibliography 2000s. 7165.