Spectroscopic properties and energy transfer processes in Er3+/Nd3+ co-doped tellurite glass for 2.7-\mu m laser materials

Abstract

Intense 2.7-μm emissions are obtained from Er 3+/Nd 3+ co-doped tellurite glass samples under the 808-nm laser diode excitation. According to the absorption spectra, Judd-Ofelt parameters and radiative transition probabilities are calculated and analyzed using the Judd-Ofelt theory. The spectroscopic properties and energy transfer mechanism between Er 3+ and Nd 3+ are analyzed. The effects of OH - content on the spectroscopic properties of Er 3+/Nd 3+ co-doped samples are discussed. The obtained results indicate that Er 3+/Nd 3+ co-doped tellurite glass can significantly develop optical properties of 2.7-μm emission, if OH - groups can be effectively eliminated. © 2012 Chinese Optics Letters.