OPTICAL CHARACTERIZATION OF Nd3+ DOPED TeO2-ZnCl2

Abstract

Understanding optical properties of tellurite glasses modified and fabricated by controlling Nd3+ doping are promising for photonic applications. Neodymium doped zinc-tellurite glasses of composition (70-x)TeO2-30ZnCl2-xNd2O3 with concentration from 0.0 to 3.0 mol% (x=0, 1, 2 and 3) were prepared by using an ordinary melt-quench casting technique. The amorphous nature of the glass were confirmed from x-ray diffraction technique. The UV absorption spectra recorded nine bands and the values of the indirect optical band gaps found between 2.76-3.20 eV, while the Urbach energy values varies are between 1.20-2.59 eV. The indirect optical energy gap for indirect transition and Urbach energy had minimum value for Nd3+ at 1% mol. The varying concentration of Nd3+ ions found to have a strong effects on optical and structural properties of the glass.