Yb∶Ca_(3)(NbGa)_(5)O_(12)晶体的坩埚下降法生长及光学性能研究  

Growth and Optical Properties of Yb∶Ca_(3)(NbGa)_(5)O_(12)Crystals by Bridgman Method

作　　者：赵涛 艾蕾 梁团结 钱慧宇 孙志刚 潘建国[1] ZHAO Tao;AI Lei;LIANG Tuanjie;QIAN Huiyu;SUN Zhigang;PAN Jianguo(Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province,School of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学材料科学与化学工程学院,浙江省光电探测材料及器件重点实验室,宁波315211

出　　处：《人工晶体学报》2024年第4期620-626,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51832009,512302300)。

摘　　要：使用坩埚下降法成功生长出了镱离子掺杂钙铌镓石榴石晶体(Yb∶Ca_(3)(NbGa)_(5)O_(12))。通过XRD测试分析了晶体的结构,该晶体为立方晶系,晶胞参数a=b=c=12.471。对该晶体进行了拉曼光谱、透过光谱、吸收和发射光谱、荧光寿命等测试,计算了该晶体的吸收截面、发射截面、增益截面等。研究了在空气中退火对该晶体吸收光谱、发射光谱、荧光寿命的影响,退火前在935 nm处吸收截面为1.82×10^(-20)cm^(2),退火后降低为1.40×10^(-20)cm^(2),退火前在1031 nm处的发射截面为0.56×10^(-20)cm^(2),退火后降低为0.40×10^(-20)cm^(2),退火前荧光衰减时间为1.42 ms,退火后为1.32 ms。结果表明,Yb∶Ca_(3)(NbGa)_(5)O_(12)单晶在空气中退火会对晶体的激光性能造成不利影响。Ytterbium ion doped calcium niobium gallium garnet crystal(Yb∶Ca_(3)(NbGa)_(5)O_(12))was successfully grown by Bridgman method.The structure of the crystal was analyzed by XRD.The crystal is cubic crystal system,and the unit cell parameter a=b=c=12.471.The crystal was tested by Raman spectroscopy,transmission spectroscopy,absorption and emission spectroscopy,and fluorescence lifetime.The absorption cross section,emission cross section,and gain cross section of the crystal were calculated.The effects of annealing in air on the absorption spectrum,emission spectrum and fluorescence lifetime of the crystal were studied.The absorption cross section at 935 nm before annealing is 1.82×10^(-20)cm^(2),and it decreases to 1.40×10^(-20)cm^(2)after annealing.The emission cross section at 1031 nm before annealing is 0.56×10^(-20)cm^(2),and it decreases to 0.40×10^(-20)cm^(2)after annealing.The fluorescence decay time before annealing is 1.42 ms,and it is 1.32 ms after annealing.The results demonstrate that the annealing of Yb∶Ca_(3)(NbGa)_(5)O_(12)single crystal in air will adversely affect the laser performance of the crystal.

关 键 词：Yb∶Ca_(3)(NbGa)_(5)O_(12)晶体 坩埚下降法 吸收光谱 发射光谱 荧光衰减 退火 

分 类 号：O782[理学—晶体学]