掺铥钇镓石榴石激光晶体的生长及其光学性能

Growth and Optical Properties of Tm3+-doped Yttrium Gallium Garnet Crystal

采用光浮区法生长了掺铥钇镓石榴石（Tm：Y3Ga5O12,Tm：YGG）激光晶体,探索了Tm：YGG晶体的光学性能,测试了其室温吸收谱并计算了吸收截面和发射截面。使用中心波长为795 nm的激光二极管作为泵浦源,实现了Tm：YGG晶体的连续激光输出,得到了波长为2 012.8 nm的激光,阈值为0.515 W,斜效率为9.9%,光光转换效率为9.3%。结果表明Tm：YGG晶体在2μm波段可能有好的应用前景。

Tm^3＋ doped yttrium gallium garnet（i.e.,Tm：Y3Ga5O12,Tm：YGG） laser crystal was grown by an optical floating zone method.The optical properties of the Tm：YGG crystal was investigated.The absorption cross section and emission cross section were calculated based on the absorption spectra of the Tm：YGG.When pumped by a 795 nm laser diode,a continuous-wave Tm：YGG laser at 2 012.8 nm was realized at a threshold of 0.515 W,a slope efficiency of 9.9% and an optical conversion efficiency of 9.3%.The experimental results show that the Tm：YGG crystal is a potential material for the laser at 2 μm.