梯度掺杂的YVO_(4)-Nd∶YVO_(4)复合晶体  

Gradient Doping YVO_(4)-Nd∶YVO_(4) Composite Crystal

作　　者：邱科彬 庄乃锋 陈新 陈玮冬[2] 张戈[2] 赵斌 QIU Kebin;ZHUAN Naifeng;CHEN Xin;CHEN Weidong;ZHANG Ge;ZHAO Bin(College of Chemistry, Fuzhou University, Fuzhou 350108, China;Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou 350002, China)

机构地区：[1]福州大学化学学院,福州350108 [2]中国科学院福建物质结构研究所,福州350002

出　　处：《人工晶体学报》2021年第12期2205-2211,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51972062)。

摘　　要：利用改进的提拉法生长了一种新型YVO_(4)-Nd∶YVO_(4)复合晶体,在晶体中部实现了Nd^(3+)的0.10%~0.25%(原子数分数)浓度梯度掺杂。晶体中,Nd^(3+)掺杂区的弱吸收系数较未掺杂区大,表现出界面吸收现象。观测了复合晶体对泵浦光的吸收和温度分布,发现晶体沿轴向的泵浦吸收相对均匀,温度梯度相对较小。未镀膜的复合晶体样品在1064 nm波段显示了良好的连续激光性能,光-光转换效率为37.0%,斜效率为40.9%。A new YVO_(4)-Nd∶YVO_(4) composite crystal was grown by a modified Cz method,a 0.10%~0.25%(atomic ratio)concentration gradient doping of Nd^(3+)in the middle part of the crystal was achieved.In the crystal,the weak absorption coefficient of the Nd^(3+)doped region is larger than that of the un-doped region,indicating the interface absorption phenomenon.By observing the absorption of the pump light by the composite crystal and temperature distribution in the crystal,it is found that the pumping absorption of the crystal along the axial direction is relatively uniform,and the temperature gradient in the crystal is relatively small.The uncoated composite crystal samples achieve well performance of CW laser at 1064 nm,with a light-to-light conversion efficiency of 37.0%and a slope efficiency of 40.9%.

关 键 词：钒酸盐晶体 复合晶体 激光晶体 浓度梯度 弱吸收 温度梯度 激光性能 

分 类 号：O734[理学—晶体学]