Abstract
In this paper, the thermal properties and internal structures of fluorotellurate glasses with different concentrations of TeO2 were studied. Glass samples with a concentration of 30mol% TeO2 were doped with different concentrations of Er3+ (1,2, 3,3.5,4,4.5,5mol%) and their luminescence characteristics were analyzed. The fluorotellurate glass possess high infrared transmittance (93%), thermal stability(ΔT>110°C), and low phonon energy (821cm-1). Er3+ doped fluorotellurate glass exhibits high fluorescence lifetime of 4I11/2 level (1.59ms), large emission cross-section (5.98×10−21cm2), and achieves a quantum efficiency of up to 30%. These experimental findings suggest promising prospects for the utilization of Er3+ doped fluorotellurate glass in 2.7μm laser applications.
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