The influence of TeO2 on thermal stability and 1.53 μm spectroscopic properties in Er3+ doped oxyfluorite glasses

• A kind of new fluoroaluminate–tellurite glass is prepared.
• The thermal ability of fluoroaluminate is improved a lot by adding TeO2.
• The structure of fluoroaluminate–tellurite is investigated.
• The change of near-infrared luminescence properties caused by TeO2 has been investigated.
• The new fluoroaluminate–tellurite glass has good spectroscopic properties, bandwidth characteristics and gain performances.

In this work, the thermal and spectroscopic properties of Er3+-doped oxyfluorite glass based on AMCSBYT (AlF3–MgF2–CaF2–SrF2–BaF2–YF3–TeO2) system for different TeO2 concentrations from 6 to 21 mol% is reported. After adding a suitable content of TeO2, the thermal ability of glass improves significantly whose ΔT and S can reach to 118 °C and 4.47, respectively. The stimulated emission cross-section reaches to 7.80 × 10−21 cm2 and the fluorescence lifetime is 12.18 ms. At the same time, the bandwidth characteristics reach to 46.41 × 10−21 cm2 nm and the gain performance is 63.73 × 10−21 cm2 ms. These results show that the optical performances of this oxyfluorite glass are very well. Hence, AMCSBYT glass with superior performances might be a useful material for applications in optical amplifier around 1.53 μm.

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