Nd∶(La,Sr)(Al,Ta)O_3晶体的生长及光谱性能的研究

Growth and Spectroscopic Properties of Nd∶(La,Sr)(Al,Ta)O_3 Crystal

应用中频感应提拉法生长了新型的Nd3+∶(La,Sr)(Al,Ta)O3(Nd3+∶LSAT)晶体。运用电感耦合等离子体原子发射光谱仪(ICP-AES)测定Nd3+离子在Nd3+∶LSAT晶体中的分凝系数为0.587。X射线粉末衍射(XRPD)测试结果表明Nd3+∶LSAT晶体与LSAT晶体同构。研究了不同退火条件对晶体光谱性能的影响。分析了Nd3+∶LSAT晶体的光谱性能,Nd3+∶LSAT晶体的荧光寿命为290μs。比较了Nd3+∶LSAT和Nd3+∶YAG,Nd3+∶YVO4等晶体的光谱参数。结果表明Nd3+∶LSAT是一种适合激光二极管(LD)抽运的、有前景的激光增益介质。

A new kind crystal Nd^3＋ ： （La, Sr） （Al, Ta）O3 （brief in Nd^3＋ ： LSAT） has been grown by the conventional Czochralski method. The segregation coefficient of Nd^3＋ ions in Nd： I.SAT crystal detected by inductively coupled plasma-atomic emission spectrometer （ICP-AES） method is 0. 587. X-ray powder diffraction （XRPD） experiment shows that Nd^3＋ ： LSAT crystal has the same structure as LSAT crystal. The influence of annealing on the spectral performances of Nd^3＋ ：LSAT crystal has been studied. The spectral performance of Nd^3＋： LSAT crystal at room temperature has been analyzed. The fluorescence lifetime of Nd^3＋ ：LSAT crystal is 290 μs. The spectroscopic parameters of Nd3＋ ： LSAT, Nd^3＋ ： YAG and Nd^3＋： YVO4 crystal have been compared. The results indicate that Nda^3＋： LSAT is favorable for laser diode-pumped system and that it is a promising laser crystal.