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Influence of La2O3 on the Structure, Thermal, and Luminescence Properties of Er3+-Doped TeO2-Ga2O3-BaF2 Glass
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DOI：10.1002/bio.70551.png)
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Abstract
En 中文
A series of TeO2-Ga2O3-BaF2-La2O3 glasses were prepared via the conventional melt quenching method. The structure and thermal properties were systematically investigated via Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and differential scanning calorimetry (DSC). The results indicate that the addition of La2O3 raises the glass transition temperature (Tg) to 426°C and improves resistance to crystallization of fluorotellurite glass, simultaneously maintaining a high mid-infrared (MIR) transmittance (~85%) and a low hydroxyl content (0.30 cm−1). Furthermore, the addition of La2O3 also enhances the emission intensity of fluorotellurite glass doped with an identical Er2O3 concentration. On the basis of the optimized composition (6 mol% La2O3), the maximum Er2O3 doping concentration of fluorotellurite glass reaches 6 mol%, which corresponds to absorption and emission cross-sections of 5.54 × 10−21 cm2 and 6.63 × 10−21 cm2, respectively. These results suggest that the prepared fluorotellurite glass is a viable gain medium for MIR fiber lasers.
Keywords:
Er3+ doping
fluorotellurite glass
La2O3 modification
thermal properties
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