Nd:YAG晶体发光的浓度和温度特性  

Luminescence Dependence upon Concentration and Temperature in Nd:YAG Crystals

作　　者：毛艳丽[1] 朱纪春[1] 

机构地区：[1]河南大学物理与信息光电子学院,河南开封475001

出　　处：《郑州大学学报（理学版）》2003年第4期41-44,共4页Journal of Zhengzhou University:Natural Science Edition

基　　金：河南大学校内基金资助项目;编号XK 0 10 98

摘　　要：在 8K低温下测量了温梯法生长的不同浓度Nd :YAG晶体的高分辨吸收谱 ,Nd掺杂的摩尔分数分别为0 .0 1,0 .0 2和 0 .0 3,YAG在不同浓度下都存在明显的卫星线结构 .对不同浓度Nd :YAG晶体荧光光谱的研究发现 ,摩尔分数为 0 .0 2的Nd :YAG晶体具有最强的荧光强度 .从 6K到 30 0K的不同温度下对不同浓度Nd :YAG晶体的4F3 / 2 能级的荧光衰减进行了测量 .实验发现 ,不同浓度Nd :YAG的衰减曲线都表现出明显的非指数形式 .高浓度Nd :YAG晶体的荧光寿命呈现出明显的温度依赖特性 ,这主要归因于Nd3 + 离子间相互作用和能量转移速率随Nd浓度的增加而增大 .The high resolution absorption spectra of Nd:YAG crystals grown by temperature gradient technique (TGT) are measured for Nd ion mole fractions of concentration in the range 0.01～0.03 at low temperature(8K). The satellitic lines of Nd:YAG crystals are observed besides the main line for different Nd dopant concentrations. The measurement of emission spectra for different Neodymium dopant concentration at low temperature suggest that the Nd:YAG crystals with 0.02 mole fraction of Nd ion concentration possess the highest fluorescence intensity. The emission decays of 4F_ 3/2 level of Nd 3+ in YAG by pumping into 4G_ 5/2 level are measured at temperatures 6K～300K for different Neodymium dopant concentrations. The nonexponential luminescence decays are observed for different Nd ion concentration of Nd:YAG. The dependence of fluorescence lifetime on temperature for highly doped Nd:YAG ascribes to the interactions between Nd ions and the rate of energy transfer increasing.

关 键 词：ND:YAG晶体 发光浓度 温梯法 荧光衰减 能量迁移 激光晶体 

分 类 号：O614.335[理学—无机化学] O734[理学—化学]