Upconversion luminescence of Er<sup>3+</sup>/Yb<sup>3+</sup> Co-Doped Sb<sub>2</sub>O<sub>3</sub>-WO<sub>3</sub>-Li<sub>2</sub>O Antimonate Glasses

Abstract

A series of Er3+/Yb3+ co-doped Sb2O3-WO3-Li2O glasses were prepared. Intense green upconversion fluorescence was observed near 524 and 544nm under excitation at 980 nm. The upconversion process was proved to be a two-photon absorption process. The upconversion fluorescence efficiency was enhanced by increasing introduction concentration of Yb3+ ions. The low maximum phonon energy of the glasses indicated that the glasses were good potential for upconversion optical devices.