Tm:Lu_3Al_5O_(12)晶体的生长与光谱性能研究  

Growth and Spectral Properties of Tm:Lu_3Al_5O_(12) Crystal

作　　者：王晓丹[1] 徐晓东[2] 臧涛成[1] 马春兰[1] 赵志伟[2] 徐军[3] 

机构地区：[1]苏州科技学院物理科学与技术系,江苏苏州215009 [2]中国科学院上海光学精密机械研究所,上海201800 [3]中国科学院上海硅酸盐研究所,上海201800

出　　处：《中国稀土学报》2009年第6期745-749,共5页Journal of the Chinese Society of Rare Earths

摘　　要：采用提拉法生长高质量的纯LuAG晶体和4%(原子分数)Tm:LuAG晶体。对晶体的晶胞参数和光谱性能进行了详细的表征。研究发现:Tm3+的掺入没有改变LuAG基质的晶体结构;吸收光谱中255 nm处的吸收带是由Fe3+,Fe2+引起的;晶体在782 nm处的吸收峰,与商用AlGaAs二极管的发射波长匹配良好,吸收截面为5.07×10-21cm2。Tm:LuAG晶体在2μm波段的荧光峰对应3F4-3H6能级之间的跃迁,荧光寿命长达11.9 ms,有利于激光的高能量调Q输出。结果表明,Tm:LuAG晶体是2μm激光器中很有发展潜力的增益介质,将会替代Tm:YAG晶体应用于激光雷达系统。The high-quality Lu3Al5O12（LuAG）crystal and Tm：Lu3Al5O12（Tm：LuAG） crystal doped with 4% Tm3＋ were grown by the Czochralski method.The cell parameters and the spectral properties of the crystals were characterized.The experiment indicated that the crystal structure of LuAG was not changed with Tm3＋ doping.The absorption band at 255 nm was connected with Fe3＋,Fe2＋.The absorption peaked at 782 nm matched with the emission peak of AlGaAs diode very well and the absorption cross section was 5.07×10-21 cm2.The 2 μm emission bands of the Tm：LuAG crystal corresponded to the 3F4→3H6 transition of Tm3＋.The fluorescence lifetime was 11.9 ms,which was in favor of high power laser output.These results indicated that the Tm：LuAG crystal could be considered as a promising material for 2 μm solid-state laser and it might be applied on the laser radar instead of Tm：YAG crystal.

关 键 词：Tm:LuAG晶体 晶胞参数 吸收光谱 荧光光谱 稀土 

分 类 号：O782.6[理学—晶体学]