We report the first observation of modification of the surface-refractive index of sol-gel silica glasses for waveguide fabrication. Techniques for fabrication and measurements of attenuation and index change are reported. Preliminary results are encouraging showing the viabilitysof the sol-gel technology in integrated optical applications.
R. V. Ramaswamy,
"Gel Silica Waveguides", Proc. SPIE 0878, Multifunctional Materials, (3 May 1988); doi: 10.1117/12.943960; https://doi.org/10.1117/12.943960