Effect of F- ions on spectroscopic properties of Yb3+-doped zinc-tellurite glasses

this paper is retracted

The effects of F- ions in zinc-tellurite glass systems on spectroscopic properties of the Yb3+ are investigated. The results show that both the emission cross-section and the fluorescence lifetime of Yb3+ ions increase evidently which indicates that such oxyfluoride tellurite glass system is a promising laser host matrix for high power generation. FT-IR spectra were used to analyze the effect of F- ions on the structure of zinc-tellurite glasses and OH- groups in this glass system. Analysis demonstrates that addition of fluoride decreases the symmetry of the structure of zinc-tellurite glasses that increases the emission cross-section and removes the OH- groups. This improves the measured fluorescence lifetime of Yb3+ ions. (c) 2005 Elsevier Ltd. All rights reserved.