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High-frequency Bragg gratings in a photothermorefractive glass

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Abstract

Holographic UV mirrors were recorded in a volume of photothermorefractive glass. This photosensitive silicate glass doped with silver, cerium, and fluorine is transparent in the near-UV, visible, and near-IR spectral regions, and its induced refractive-index change reaches 10-3. UV radiation of a He–Cd laser at 325 nm was used for Bragg grating recording with a spatial frequency of 9200 mm-1. The absolute diffraction efficiency of the recorded mirror reached 12.6% at 325 nm and did not deteriorate under the long-time effects of optical irradiation and heating up 400 °C.

© 2000 Optical Society of America

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