Yb,Ho∶GdScO_(3)晶体生长及光谱性能分析  

Crystal Growth and Spectral Properties of Yb,Ho∶GdScO_(3) Crystal

作　　者：孙贵花[1,2] 张庆礼 李加红[1,2,3] 罗建乔 王小飞 高进云[1,2] SUN Guihua;ZHANG Qingli;LI Jiahong;LUO Jianqiao;WANG Xiaofei;GAO Jinyun(Anhui Provincial Key Laboratory of Photonics Devices and Materials,Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei 230031,China;School of Environmental Science and Optoelectronic Technology,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院合肥物质科学研究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]先进激光技术安徽省实验室,合肥230031 [3]中国科学技术大学环境科学与光电技术学院,合肥230026

出　　处：《人工晶体学报》2023年第7期1243-1249,共7页Journal of Synthetic Crystals

基　　金：国家重点研发计划(2022YFB3605700);先进激光技术安徽省实验室主任基金(AHL20220ZR04)。

摘　　要：采用提拉法生长出了尺寸为∅30 mm×50 mm的Yb,Ho∶GdScO_(3)晶体。通过X射线衍射得到了晶体的粉末衍射数据,使用GSAS软件进行了全谱拟合,得到了晶体的结构参数。测试了晶体的拉曼光谱,在100~700 cm^(-1)观察到18个拉曼振动峰。对Yb,Ho∶GdScO_(3)晶体的光谱特性进行了表征,并计算了Yb^(3+)的吸收截面,其在940、975 nm处的吸收截面分别为0.31×10^(-20)、0.42×10^(-20) cm^(2)。采用Judd-Ofelt理论计算了Ho^(3+)的跃迁强度参量Ω_(t),Ω_(4)/Ω_(6)值为2.04,并计算了辐射跃迁概率、能级寿命及荧光分支比等光谱参数。结果表明,Yb,Ho∶GdScO_(3)晶体的发光性能良好,是一种有前景的2~3μm激光晶体候选材料。As a kind of excellent host material for solid-state lasers,GdScO_(3) crystal has attracted more and more attention.In this paper,Yb,Ho∶GdScO_(3) crystal with the size of∅30 mm×50 mm was firstly grown by Czochralski growth method.The powder diffraction data were obtained by X-ray diffraction,and the structure parameters were fitted by GSAS software.Raman spectra were measured.In the range of 100 to 700 cm^(-1),there are 18 Raman vibration peaks were observed.The spectral properties including transmission and emission of Yb,Ho∶GdScO_(3) crystal were characterized.The center of the strongest absorption band is at 975 nm,which comes from the transition of Yb^(3+)∶2 F 7/2→2 F 5/2.The absorption cross section of Yb^(3+)were calculated and the values at 940,975 nm are 0.31×10^(-20) and 0.42×10^(-20) cm^(2).The transition intensity parameter(Ω_(t))radiation transition probability,energy level lifetime and fluorescence branching of Ho^(3+) was calculated by Judd-Ofelt theory,Ω_(4)/Ω_(6) is 2.04.And spectral parameters such as radiation transition probability,energy level lifetime and fluorescence branching ratio were calculated.The results show that Yb,Ho∶GdScO_(3) is a promising candidate material for 2~3μm laser crystals because of its excellent luminescence properties.

关 键 词：2~3μm激光 Yb Ho∶GdScO_(3)晶体 晶体生长 光谱性能 JUDD-OFELT理论 

分 类 号：O78[理学—晶体学] O641