Er~(3+)-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 Tg and crystallization onset temperature Tx are 377.1 and 488.5, 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 4I13/2 to the ground level 4I15/2 is 0.91×10-20cm2. Multi modes at 632.8nm were detected in Er3+-doped tungsten-tellurite glass, and the fitting effective diffusion coefficient De of Ag+ ion at 300℃ and the activation energy Q were calculated to be 2.82×10-16μm2 and 149.7kJ/mol, respectively. The results show that Er3+ doped tungstentellurite glass is a prospective candidate for broadband integrated optical amplifier materials.