Tm^(3+)掺杂Bi_2O_3-SiO_2-PbO玻璃的～2μm发光光谱性质  

Spectral Properties of ～2 μm Emission of Tm^(3+) Doped Bi_2O_3-SiO_2-PbO Glass

作　　者：王欣[1,2] 李科峰[1] 凡思军[1,2] 白功勋[1] 胡丽丽[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800 [2]中国科学院研究生院,北京100049

出　　处：《无机材料学报》2013年第2期165-170,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金重点项目(60937003)~~

摘　　要：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3.54×1020ions/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7.2×10-21cm2。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。Silicate glasses 33Bi203-50SiO2-17PbO doped with 0.1%,0.25%, 0.5%, 0.75% and 1% Tm2O3 were prepared by the conventional melting method. Thermal property was studied by the DSC （Differential Scanning Calorimeter） method. Its Tx-Tg value is 138℃. According to the absorption spectra and Judd-Ofelt theory, J-O strength parameters, radiative transition properties, the radiative lifetimes and the branching ratio of some excited state energy levels were calculated. Analysis on the relationship between 3F4 lifetime and Tm3＋ doped concentration showed that the critical concentration for self-quenching is 3.54x102~ ions/era3. The absorption and emission cross-sections of Tm^3＋：3F4→^3H6 transition were obtained using McCumber theory. The maximum absorption cross-section is 3.7×10^-21 cm2 at 1658 nm and the maximum emission cross-section is 7.2×10^-21 cm^2 at 1842 rim. The results show that Tm^3＋ doped 33Bi203-50SiO2-17PbO material is an ideal candidate to realize -2 μm laser.

关 键 词：铋硅酸盐玻璃 Tm3+掺杂 光谱性质 

分 类 号：TQ171[化学工程—玻璃工业]