We demonstrate volume gratings written in solgel-derived, Ge-doped silica monoliths. Glass was fabricated both with and without germanium oxygen deficient center (GODC) defects. The UV absorption and UV-induced index changes of these glasses, with and without hydrogen loading, are reported. The presence of GODC defects greatly enhances the photosensitivity of Ge-doped silica with and without the presence of hydrogen.
© 2000 Optical Society of America
A. D. Heaney and T. Erdogan, "Solgel-derived photosensitive germanosilicate glass monoliths," Opt. Lett. 25, 1765-1767 (2000)