摘要： We investigated thermal and fluorescence properties of Er3+ doped fluoroaluminate multi-component glasses modified by TeO2 and CaCl2. A better thermal stability with a higher ΔT (98 °C) was obtained for the TeO2 modified sample, which had a high radiative transition probability (Arad) of the Er3+: 4I11/2→4I13/2 transition. In addition, under 980 or 808 nm excitation, the Er3+ 2.7 μm emission intensity of the TeO2 modified sample decreased owing to its increased hydroxyl content induced by TeO2 modifiers. Excellent mid-infrared fluorescence along with a longer lifetime (3.48 ms) were observed in the glass tuned by CaCl2. The CaCl2 modified sample exhibited higher stimulated absorption and emission cross sections, obtained using the Füchtbauer-Ladenburg and McCumber formulas. Moreover, the strong effect of hydroxyl on the mid-infrared fluorescence properties was systematically analyzed. The oxygen network modifiers in the fluoroaluminate multi-component glass provide improved thermal properties, while the AlF3-based glasses with chlorine network modifiers have larger potentials for applications in the mid-infrared region.