Yb^(3+):Gd_2SiO_5晶体的结构和光谱性能  

Structure and spectral properties of Yb^(3+):Gd_2SiO_5 crystal

作　　者：宁凯杰[1,2] 张庆礼 周鹏宇[1,2] 杨华军[1,2] 许兰[1,2] 孙敦陆 殷绍唐 

机构地区：[1]中科院安徽光学精密机械研究所安徽省光子器件与材料重点实验室,合肥230031 [2]中国科学院研究生院,北京100049

出　　处：《物理学报》2012年第12期557-564,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:90922003;50872135;50932005);中国科学院知识创新工程重要方向性项目(批准号:YYYJ-1002)资助的课题~~

摘　　要：采用提拉法成功生长尺寸为φ30 mm×75 mm的15at.%Yb^(3+):Gd_2SiO_5单晶,并用Reitveld全谱拟合方法确定了其晶格常数、原子坐标和温度因子等参数.用吸收光谱计算了Yb^(3+)离子~2F_(7/2)(?)~2F_(5/2)能级跃迁的振子强度、谱线强度、跃迁概率、能级寿命和积分发射截面等光谱参数,并根据激光性能评估得出结论:该晶体具有较大的阈值特性,有望采用大功率激光二极管泵浦实现可调谐或超快激光输出.15at.%Yba＋：Gd2SiO5 crystal with a size of Ф30 mmx 75 mm is grown by the Czochralski method, and its lattice parameters, atom coordinates and temperature factors are determined by the full-profile Rietveld refinement method. Its spectral parameters of oscillator strength, line strength, transition probability, energy lifetime and integral emission cross-section for yb3＋2FT/2 ~ 2F5/~ transition are calculated using the absorption spectraum. And the laser performance evaluation shows that this crystal is a potential laser crystal with relatively high threshold, and could be used as a medium of tunable or ultra-fast laser pumped by high-power laser diode.

关 键 词：Yb^3+:Gd_2SiO_5晶体生长 晶体结构 吸收光谱 发射光谱 

分 类 号：O76[理学—晶体学]