Photosensitivity of solgel-derived germanosilicate planar waveguides
- 1 January 1993
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 18 (1), 25-27
- https://doi.org/10.1364/ol.18.000025
Abstract
The effects of controlled atmosphere heat treatments on the photosensitivity and UV absorption of GeO2–SiO2 solgel planar waveguides are presented. Photoinduced refractive-index changes in the samples are deduced from photosensitive grating writing experiments and are found to be of the order of those seen in some fiber experiments. A correlation is seen between the sample sensitivity and the strength of the absorption at 242 nm, providing insight into the possible mechanisms governing photosensitive processes in these materials.Keywords
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