中文摘要：

研究了（90-x）TeO2-xWO3-9La2O3-1Tm2O3（x=10、20、30（mol%））玻璃（以下简称TWL玻璃）的热学性能和光谱性质.研究发现WO3的增加可以提高TWL玻璃的热稳定性,降低玻璃的热膨胀系数.WO3含量为30mol%时,玻璃化转变温度Tg达457℃,DTA曲线上无析晶开始温度Tx,且热膨胀系数降为1.224×10-5/℃（30~300℃）.玻璃的最大声子能量随WO3的增加而略微增大.用J-O理论计算了Tm3＋离子在TWL玻璃中的光谱参数和部分能级的自发辐射几率、荧光分支比、辐射寿命.用M cCumber理论计算了Tm3＋离子3F4→3H6跃迁的受激发射截面,在60TeO2-30WO3-9La2O3-1Tm2O3玻璃中,Tm3＋离子的最大受激发射截面达到9.6×10-21cm2.研究结果表明,60TeO2-30WO3-10La2O3玻璃具有优良的热学性能和光谱性质,是一种实现~2.0μm激光输出的理想玻璃基质材料.

英文摘要：

Tungsten-lanthanum-tellurite（TWL） glasses with the molar composition（90-x）TeO2-xWO3-9La2O3-1Tm2O3（x=10,20,30（mol%）） were prepared.Effects of WO3 contents on the thermal stability and spectroscopic properties of Tm3＋ doped TWL glasses were studied.It is found that the thermal stability of TWL glasses is improved with the increasing WO3 contents.For the glass with 30mol% WO3,the glass transition temperature（Tg） is 457℃,while onset crystallization temperature（Tx） is not observed in DTA curve,and the thermal expansion coefficient of the glass decreases to 1.224×10-5/℃（30-300℃）.The maximum phonon energy of the glasses shows the dependence on the host composition.The spectroscopic intensity parameters（Ωt t=2,4,6）,radiative transition rates,radiative lifetimes,and branching ratios are calculated by Judd-Ofelt theory.The emission cross-section of Tm3＋： 3F4→3H6 transition is calculated by McCu-mber theory.The maximum emission cross-section of Tm3＋ in 60TeO2-30WO3-9La2O3-1Tm2O3 glass is 9.6×10-21cm2.Evaluated from the thermal and spectroscopic properties,60TeO2-30WO3-10La2O3 glass is a promising host material for ~2.0μm laser.