不同Yb掺质浓度的Yb:Y_3Al_5O_(12)晶体激光性能的比较

Comparison of Laser Performance Parameters of Different Yb Doping Concentration Yb:Y_3Al_5O_(12) Crystals

采用提拉法生长了Yb3+掺质浓度为5%原子分数、50%原子分数和100%原子分数的Yb:Y3A l5O12(Yb:YAG)晶体,系统地分析了不同Yb3+掺质浓度晶体的吸收光谱和荧光光谱。从吸收峰和吸收系数可以看出采用940nm LD泵浦三种不同浓度的Yb:YAG晶体都比较合适。随着Yb3+离子掺质浓度的增高,晶体中出现的自吸收现象越为明显。通过对三种不同Yb掺质浓度晶体激光性能参数的计算,得出高掺质浓度Yb:YAG和YbAG晶体是有前景的激光增益介质。

Yb： YAG single crystals with Yb doping concentration 5 at %, 50at % and 100 at % were grown by the Czochralski process. The absorp concentration Yb： YAG single crystals were tion spectra and fluorescence spectra of different Yb doping studied. We can see that it＇s suitable for pumping three different Yb doping concentration Yb ： YAG crystals with 940 nm LD according to the absorption peak and absorption coefficient. The self-absorption phenomenon is clear with the increase of Yb doping concentration in YAG crystals. The laser performance parameters of three different Yb doping concentration Yb： YAG crystals were calculated. The results show that the high,doping concentration Yb： YAG and YbAG crystals are a prospect laser gain medium.