Thermal stability of WO3 doped tellurite glass and spectral properties of Er3+/Yb3+ doped tellurium-tungstate glass
In order to obtain the tellurite glass with good thermal stability and high-intensity luminescence,WO3 is doped into the TeO2-ZnO-Na2O system to improve the anti-devitrification and thermal stability of the glass.The results show that the ΔT of the tellurite glass increases from 110℃ without WO3 to 142℃ with WO3 content of 20 mol％.On the basis of thermal stability study of tellurite glass,the spectral properties of single-doped Er3+ and Er3+/Yb3+ co-doped tellurium tungstate glasses are further studied.The research results show that under the co-doping conditions of Er3+/Yb3+,the energy transfer between Er3+/Yb3+ improves the absorption efficiency of Er3+ ions for 980 nm pump light,and the luminescence intensity in the 1.5 μm band is enhanced.Finally,Er3+/Yb3+ co-doped tellurium-tungstic glass with high-intensity 1.5 μm band emission is obtained,indicating that the co-doping of Er3+/Yb3+ is an effective method to achieve high-intensity luminescence in the 1.5 μm band.
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