Thermal and Optical Studies of Rare Earth Doped Tungston–Tellurite Glasses

The goal of this work is to prepare and characterize rare earth doped Tungston-Tellurite glasses. Tellurite glasses are well known for their use in optical fibre communication system, device technology etc. These glasses are stable at room temperature, and have good thermal, mechanical and optical properties.Er 2 O 3 and Gd 2 O 3 doped TeO 2 -WO 3 -La 2 O 3 and TeO 2 -WO 3 -PbO glasses are prepared from high purity oxides mixtures, melting in an alumina crucible in air atmosphere. Differential Scanning Calorimetry is used to study the thermal stability of the glass systems and UV/Vis/NIR spectroscopy is used to study the optical properties of the glasses. The glass transition temperature, Crystallization temperature, melting temperature and the variation in the optical band gap, and refractive index of these samples are calculated with the addition of Er 2 O 3 and Gd 2 O 3 .