Tm^3＋与Ho^3＋单掺杂锗酸盐玻璃的增益特性  

Gain Properties of Germanate Glasses Singly-Doped with Tm^(3+) and Ho^(3+) Ions

作　　者：林琼斐[1] 夏海平[1] 王金浩[1] 张约品[1] 章践立[2] 贺赛龙[2] 

机构地区：[1]宁波大学光电子功能材料重点实验室,浙江宁波315211 [2]宁波大学学报编辑部,浙江宁波315211

出　　处：《中国稀土学报》2008年第2期141-147,共7页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(60777030);浙江省自然科学基金(Y406220);宁波市重点实验室开放基金(2007A22010)资助项目

摘　　要：制备了掺杂浓度分别为2.0mol%的Tm3+及Ho3+单掺的两种锗酸盐玻璃。根据McCumber理论计算了Tm3+离子能级3H6←→3F4(1.8μm)跃迁和Ho3+离子能级5I8←→5I7(2.0μm)跃迁的吸收截面和受激发射截面。同时,根据所获得的吸收截面、发射截面以及掺杂离子的浓度分别获得了Tm3+离子和Ho3+离子在两种不同锗酸盐玻璃基质中的增益截面函数,从该函数可反映出材料的粒子数反转特性。对于Tm3+离子掺杂的锗酸盐玻璃,其吸收截面、发射截面和增益截面的最大值大于在氟锆酸盐、氟化物和氟氧化物玻璃中;对于Ho3+掺杂的锗酸盐玻璃,其吸收截面、发射截面和增益截面的最大值也大于在氟锆铝酸盐玻璃。因此,Tm3+和Ho3+掺杂的两种锗酸盐玻璃在~1.8和~2.0μm波段的中红外激光器中将有潜在的应用前景。Two kinds of germanate glasses singlydoped with 2.0% （molar fraction） Tm3＋ ions and 2.0% （molar fraction） Ho^3＋ ions concentration were prepared. According to McCumber theory, the absorption and stimulated emission cross-sections corresponding to the ^3H6←→^3F4 transitions of Tm^3＋ （at 1.8 μm） and the ^5I8←→^5I7 transitions of Ho^3 ＋ （at 2.0 μm） the respective gain cross section spectra were also computed as a function of population inversion according to absorption and emission cross-sections and the ion concentrations. For Tm^3＋doped germanate glasses, the maximum of the absorption, emission and gain cross-sections reached a value higher than that reported for fluorozirconate, fluoride and oxyfluoride glasses. For Ho^3＋-doped germanate glasses, the maximum of absorption, emission and gain cross-sections reached a value higher than that reported for fluorozircoaluminate glasses. Hence, these Tm^3＋ -doped and Ho^3＋-doped germanate glasses would have a potential application in mid-infrared lasers at about 1.8 and 2.0 μm wavelength.

关 键 词：光学材料 Tm^3+与Ho^3+掺杂锗酸盐玻璃 发射截面 增益截面 稀土 

分 类 号：TQ171[化学工程—玻璃工业]