Yb∶Y_3Al_5O_(12)晶体晶格振动光谱的研究  

Lattice Vibrational Spectrum of Yb∶Y_3Al_5O_(12) Crystals

作　　者：王晓丹[1] 赵志伟[1] 徐晓东[1] 姜本学[1] 唐慧丽[1] 王静雅[1] 徐军[1] 邓佩珍[1] 

机构地区：[1]中国科学院上海光学精密机械研究所

出　　处：《光学学报》2007年第8期1525-1528,共4页Acta Optica Sinica

基　　金：国家863计划(2002AA311030)资助课题

摘　　要：采用提拉法生长Y3Al5O12(YAG)晶体和Yb3+掺杂原子数分数分别为5%,10%,15%,20%,25%,50%和100%的Yb∶Y3Al5O12(Yb∶YAG)晶体。系统表征和分析了Yb3+掺杂浓度对拉曼光谱的影响。随着Yb3+掺杂浓度的增加,晶体的振动模式没有明显的变化,晶体结构没有改变;在370 cm-1和785 cm-1附近,振动吸收峰的半峰全宽逐渐增大。分析得出,Yb3+掺杂浓度对晶体的晶格、对称性、荧光寿命均有影响,从而可能影响到晶体的光谱和激光性能。Y3A15O12（YAG） and Y3A15O12（Yb： YAG） single crystals with Yb^3＋ doping atomic number fraction of 5%, 10%, 15%, 20%, 25%, 50%, and 100% were grown by the Czochralski method. The effects of Yb^3＋ doping level on the Raman spectra were studied. There were little abrupt change of the vibration modes and little change of the crystal structure with the increase of Yb3＋ doping level in Yb：YAG crystals; but the fullwidth at half maximum of absorption peak centered at 370 cm^-1 and 785 cm^-1 increased with the increase of Yb^3＋ doping level. The results show that Yb^3＋ doping level influences the lattice, symmetry and fluorescence lifetime of Yb： YAG crystals and this may influence the spectrum and lasing properties of the crystals.

关 键 词：光学材料 晶体 YB:YAG 拉曼光谱 荧光寿命 

分 类 号：TN244[电子电信—物理电子学]