Growth and optical properties of ytterbium and rare earth ions codoped CaF2-SrF2 eutectic solid-solution(RE=Y^(3+),Gd^(3+),La^(3+))  

作　　者：Binbin Jiang Lihe Zheng Dapeng Jiang Handi Yin Jiangang Zheng Qiuhong Yang Guofeng Cheng Liangbi Su 

机构地区：[1]School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China [2]Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China [3]School of Physics and Astronomy,Yunnan University,Kunming 650091,China [4]Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang 621900,China [5]Key Laboratory of Science and Technology on High Energy Laser,China Academy of Engineering and Physics,Mianyang 621900,China

出　　处：《Journal of Rare Earths》2021年第4期390-397,共8页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(U1830104,61635012,61925508);CAS Interdisciplinary Innovation Team,National Key Research and Development Program of China(2016YFB0402101);Strategic Priority Program of Chinese Academy of Science(XDB16030000);Development of Science and Technology foundation of China Academy of Engineering and Physics(2019HEL05-2).

摘　　要：Ytterbium and rare earth ions(RE=Y,Gd,La)codoped CaF_(2)-SrF_(2)single crystals(3 at%Yb,6 at%RE:CaF_(2)-SrF_(2))were fabricated by temperature gradient technology(TGT).All the space groups remain the same Fm3m as that of Yb:CaF_(2)-SrF_(2).The lattice parameter a,unit cell volume V,as well as bond length of Ca/Sr-F and F-F increase in the sequence of rare-earth ions radius Y^(3+)<Gd^(3+)<La^(3+).The segregation coefficients of Yb ions are 0.87 in Yb,La:CaF_(2)-SrF_(2)and Yb,Gd:CaF_(2)-SrF_(2),which are larger than 0.85 in Yb,Y:CaF_(2)-SrF_(2)and 0.80 in Yb:CaF_(2)-SrF_(2).Absorption spectra in the range of 200 and 400 nm were analysed with Yb^(2+)contents.The absorption and emission cross-sections in the range of 900-1100 nm were determined together with fluorescence lifetime.The saturation pump density/Sat,minimum pump density/m in and gain cross-section were analysed.Yb,La:CaF_(2)-SrF_(2)has a relatively higher optical parameter(δem×t,0.52×10^(20)cm^(2)·ms),lower Isat(3.68 kW/cm^(2))and^min(0.50 kW/cm^(2))at 1038 nm indicating the potential application in high power laser.Low phonon energy of CaF_(2)-SrF_(2)is 302 cm^(-1)which is located between those of CaF_(2)and SrF_(2)as measured by Raman spectra.It is believed that ytterbium and rare earth ions(RE=Y^(3+),Cd^(3+),La^(3+))codoped CaF_(2)-SrF_(2)eutectic solid-solution is promising for high-power and wavelength-tunable solid-state lasers.

关 键 词：Rare earth ions Optical materials Crystal growth Luminescence Raman spectroscopy 

分 类 号：TN248[电子电信—物理电子学]