RAMAN GAIN AND STRUCTURAL OF TELLURITE-PHOSPHATE GLASSES WITH DIFFERENT MODIFIERS DOPING WITH Er2O3

Abstract

A glass series of Te-glasses (70TeO2- 10P2O5- 10ZnO- 5PbF2) modified with 5mol % of different modifiers (WO3, Al2O3, CdO, SrO, BaO), that was then doped with 600ppm Er2O3 was prepared by melt quench technique. The effect of modifier oxide on the Teglass structure was studied using Raman spectroscopy. The Obtained Raman spectra reveal the characteristic structural units TeO4 and TeO3. Er2O3 doping along with the type of oxide modifier influenced the tellurite glass network and hence the Raman spectral features. The change in the Boson peak features depend on the rare earth ion doping. The obtained Raman spectra were deconvoluted to follow the structural changes. The deconvoluted data show a transformation of TeO4 to TeO3 upon the addition of metal oxides. Due to the higher coordination of WO3 and Al2O3 that offers more oxygens when compared with alkaline modifiers, the TeO3 structural group is dominated. Raman gain was calculated for the prepared glasses. Al2O3 modified glass sample has the highest Raman gain.