Dy^(3+):Lu_(2)O_(3)中红外激光晶体的导模法生长及其光学性质  

Growth and Optical Properties of Dy^(3+):Lu_(2)O_(3)Mid-infrared Laser Crystal by EFG Method

作　　者：王贵吉 丁晓圆 尹延如 贾志泰[1] 陶绪堂[1] WANG Gui-ji;DING Xiao-yuan;YIN Yan-ru;JIA Zhi-tai;TAO Xu-tang(State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China)

机构地区：[1]山东大学晶体材料国家重点实验室,山东济南250100

出　　处：《发光学报》2022年第11期1808-1814,共7页Chinese Journal of Luminescence

基　　金：国家自然科学基金(62105181)资助项目。

摘　　要：采用导模法(Edge‑defined film‑fed growth technique,EFG)制备了无掺杂及Dy^(3+)掺杂的Lu_(2)O_(3)晶体,无掺杂及掺杂晶体在空气中退火后分别变为无色和淡黄色。采用高分辨X射线衍射、拉曼光谱以及吸收光谱等方法对晶体进行了表征。结果表明,晶体X射线衍射摇摆曲线的半峰宽分别为98.4"、170.4"、193.9",最大声子能量分别为609.0,611.4,612.6 cm^(-1);无掺杂晶体在260~3000 nm波段没有明显的吸收,而掺杂晶体具有350,742,798,884,1063,1258,1681,2774 nm Dy^(3+)的特征吸收峰。采用1258 nm激光进行激发,得到2.7~3.0μm的荧光光谱,计算了Dy^(3+)的^(6)H_(13/2)能级寿命分别为17.9μs和16.3μs。采用Judd‑Ofelt(以下简写为J‑O)理论计算了相关光学参量,结果表明Dy^(3+)∶Lu_(2)O_(3)晶体具有实现3μm波段激光输出的潜力。In this paper,undoped and Dy^(3+)doped Lu_(2)O_(3)crystalswere prepared by EFG(Edge-defined film-fed growth technique).The undoped and doped crystals turned to colorless and pale yellow after annealing in air,respectively.The undoped and doped crystals were characterized by high resolution X-ray diffraction,Raman spectroscopy and absorption spectroscopy.The results indicated that the full width at half maximum(FWHM)of the peaks were 98.4″,170.4″and 193.9″,and the maximum phonon energies were 609.0,611.4,612.6 cm^(-1),respectively.The undoped crystal had no obvious absorption in the range of 260-3000 nm band.While the doped crystals had characteristic absorption peaks of Dy^(3+)at 350,742,798,884,1063,1258,1681,2774 nm.1258 nm laser was used for excitation,and fluorescence spectra of 2.7-3μm were obtained.The lifetime of the ^(6)H_(13/2) energy level of Dy^(3+)was calculated as 17.9μs and 16.3μs,respectively.The optical parameters of Dy^(3+)∶Lu_(2)O_(3)crystal were calculated by Judd-Ofelt(hereinafter referred to as J-O)theory,and the results showed that Dy^(3+)∶Lu_(2)O_(3)crystal has the potential to realize laser output at 3μm band.

关 键 词：Dy^(3+):Lu_(2)O_(3) 导模法 中红外激光晶体 

分 类 号：O482.31[理学—固体物理]