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.
© 1993 Optical Society of America
Original Manuscript: August 5, 1992
Published: January 1, 1993
Kelly D. Simmons, Barrett G. Potter, Joseph H. Simmons, and George I. Stegeman, "Photosensitivity of solgel-derived germanosilicate planar waveguides," Opt. Lett. 18, 25-27 (1993)