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.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics