Er3+-doped tungsten-tellurite glass and planar waveguide

Er3+-doped tungsten-tellurite glass for broadband waveguide amplifier application was fabricated and characterized by the thermal stability, spectroscopic properties and ion exchange property. The glass transition temperature T-g and crystallization onset temperature T-x are 377.1 and 488.5 degrees C, respectively. The fluorescence spectrum indicates that the fluorescence width at half maximum (FWHM) is 52nm. Calculated by McCumber theory the peak stimulated emission cross section of Er3+ from the upper level I-4(13/2) to the ground level I-4(15/2) is 0.91 x 10(-20)cm(2). Multi modes at 632.8nm were detected in Er3+-doped tungsten-tellurite glass, and the fitting effective diffusion coefficient D-e of Ag+ ion at 300 degrees C and the activation energy Q were calculated to be 2.82x10(-16)mu m(2) and 149.7kJ/mol, respectively. The results show that Er3+ doped tungsten-tellurite glass is a prospective candidate for broadband integrated optical amplifier materials.