中文摘要：

用高温熔融法制备了Tm2O3掺杂深度分别为1、2、3、4和5 wt%的82GeO2-8AlF3-10Na2O（摩尔比）的玻璃。从吸收光谱特性出发,应用Judd-Ofelt（J-O）理论,计算得到了Tm3＋的J-O强度参数（Ω2,4Ω,6Ω）及Tm3＋各激发态能级的自发跃迁几率、荧光分支比以及辐射寿命等光谱参量。在808 nm波长的激发下,研究了不同Tm3＋掺杂浓度下玻璃在1.47与1.80μm处的荧光特性,当掺杂浓度约达到3 wt%时1.80μm处的荧光强度最大,然后随着掺杂浓度的增大其荧光强度反而降低。根据McCumber理论,计算了跃迁3F4→3H6的发射截面及增益截面。研究表明,此系统玻璃有望应用于中红外激光材料。

英文摘要：

The 82GeO2-8AlF3-10Na2O（molar ratio） glasses containing Tm2O3 in 1,2,3,4,and 5 wt% concentration,respectively were fabricated by conventional high temperature melting method.According to the Judd-Ofelt（J-O） theory,the JO strength parameters（Ω2,Ω4,Ω6） of Tm3＋,the radiative transition probabilities,the branching ratios and the radiative lifetimes were calculated.The fluorescence spectra（with 808 nm LD excitation） at ～1.47 and ～1.8 μm for various concentrations of Tm3＋-doped glasses were observed.The results show that the emission intensity at ～1.8 μm reaches the maximum when the Tm2O3-doping concentration is ～3 wt.%,and then decreases as doping concentration increases further.Meanwhile,the absorption and emission cross sections corresponding to the 3F4→3H6 transitions of Tm3＋ at 1.8 μm were estimated based on McCumber theory,and the gain cross section was calculated.The glasses are the new candidate materials for mid-infrared laser devices.