AMORPHOUS SOL-GEL DERIVED LEAD TITANATE THIN-FILMS USED AS PASSIVE WAVE-GUIDES

Sol-gel derived PbO-TiO2 waveguides were prepared on pyrex substrates using the dip coating technique. Heat treatments conducted at 200 degr ees C, 300 degrees C and 400 degrees C for one hour led to the densifi cation of the layers and the increase of the refractive index values. The effect of water concentration in the precursor sol on the optical qualities of the waveguides is reported. Monolayer waveguides prepared with high water concentration provided the best coefficients of atten uation values (< 1 dB/cm). Preliminary study of Waveguide Raman Spectr oscopy is presented.