Abstract
The near infrared spectroscopic properties of Tm3+−Yb3+ co-doped tellurite glasses were investigated using a 980nm laser diode. The 1.81μm emission corresponding to the 3F4→3H6 transition of Tm3+ and the 1.02μm emission of Yb3+ were recorded at room temperature. The effects of Tm3+ and Yb3+ ion concentrations on the emission characteristics and the lifetimes of 1.81μm and 1.02μm were also analyzed. These results indicate that the energy transfer occurred between the Yb3+ and Tm3+ ions in the co-doped tellurite glasses. The luminescence mechanism in Yb3+ and Tm3+ co-doped tellurite glass was also discussed, which is important to develop 1.8μm fiber lasers or 1.8μm and 1.465μm fiber amplifiers.
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