Abstract
A new TeO2-Ga2O3-BaO (TGB) glass system has been explored to achieve high-efficient luminescence at 2 μm region. The glasses are characterized by wide infrared transmittance range, excellent thermal stability, high density and refractive index, and low maximum phonon energy. Judd-Ofelt analysis reveals high spontaneous emission probabilities of Tm3+ and Ho3+ in this glass host. As a result, intense emissions near 1.8 and 2 μm were realized in the Tm3+-doped and Nd3+/Ho3+ co-doped TGB glasses, respectively. The emission cross-sections of Tm3+ and Ho3+ are 1.024 × 10−20 cm2 and 0.829 × 10−20 cm2 with maximum gain coefficients of 4.51 and 1.55 cm−1, respectively. The combined results indicate that the TGB glass system is a potential host for obtaining high-efficient 2 μm luminescence.
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