Upconversion properties of erbium nanoparticles doped tellurite glasses for high efficient laser glass

Erbium nano particles (NPs) doped tellurite glasses were prepared via melt-quenched technique and their chemical composition are as follows; {[(TeO2)(0.70)(B2O3)(0.3)(0)](0)(.7)(ZnO)(0.3)}(y) (Er(2)O(3)NPs)(1-y), y = 0.005, 0.01, 0.02, 0.03, 0.04 and 0.05. The amorphous state of the glass system was revealed and the structural parameters indicating the formation of non-bridging oxygen was shown. The current work underlines the spectral parameters from Judd-Ofelt (JO) studies, and upconversion spectra. The existence of erbium NPs was found experimentally using transmission electron microscopy (TEM). The Judd-Ofelt analysis suggests that the radiative probability, A(rad) is strong at(2)H(11/2) -> I-4(15/2) and a longer lifetime at(4)I(11/2) -> I-4(15/2). The Argon laser beam was used to determine the upconversion emission peaks. The upconversion radiation emission excited at 800 nm was found in the range 390 nm.