2ND-ORDER NONLINEAR-OPTICAL PROPERTIES IN SILICA-BASED GLASS-FILM WAVE-GUIDES

Phase-matched blue second harmonic generation was observed in a corona -poled Corning 7059 glass film waveguide. The induced quadratic optica l nonlinearity was examined by second harmonic generation with a time dependent decay for multi-complex of SiO2,BaO,B2O3 and/or Al2O3 Glass films with every possible combination of composition were fabricated a nd examined. The glass composition of SiO2-BaO-B2O3 and/or SiO2-BaO-Al 2O3 was found to play effective roles in maintaining the induced secon d order nonlinearity for a longer period of time. This is supposed to be related to distributed traps which come from complex of the glass c omponents.