用高温熔融法制备了Tm2O3摩尔掺杂浓度分别为0.1％、0.25％、0.5％、0.75％和1％的33Bi2O3-50SiO2-17PbO玻璃.采用DSC方法对该种玻璃的析晶性能进行研究,发现其Tx-Tg为138℃,说明该玻璃抗析晶性能良好.基于其吸收光谱,采用 Judd-Ofelt理论计算了Tm3+离子的J-O参数和部分激发态能级的跃迁几率、荧光寿命和分支比等光谱参量.分析3F4能级寿命随掺杂浓度变化关系,发现产生自淬灭的临界浓度为3.54x 1020 ions/cm3.用McCumber理论计算在33Bi2O3-50SiO2-17PbO玻璃中Tm3+离子3F4→3H6能级跃迁的吸收截面和发射截面,最大吸收截面和最大受激发射截面分别为3.7×10-21和7.2×10-21 cm2.研究结果表明33Bi2O3-50SiO2-17PbO玻璃具有较好的光谱性质,是一种实现～2μm激光的较理想玻璃基质.
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