Spectroscopic studies of Dy ion doped tellurite glasses for solid state lasers and white LEDs.

Rare earth ion Dy-doped tellurite glasses were synthesised in the system of (75-x)TeO-15SbO-10WO-xDyO (TSWD glasses). XRD and FTIR characterizations were used to find the crystalline and structural properties. The intensities of the electronic transitions and the ligand environment around the Dy ion were determined using the Judd-Ofelt (J-O) theory on the absorption spectra of the glasses.