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In:Yb:Nd:LiNbO3晶体的生长和光谱性能
作者:冀丽爽1  婷1 盛雨哲1  光1 2 徐玉恒2 
单位:(1. 辽宁工业大学 辽宁 锦州 121001 2. 哈尔滨工业大学 哈尔滨 150090) 
关键词:铟镱钕共掺杂铌酸锂晶体 紫外-可见吸收光谱 上转换发射光谱 提拉法 
分类号:O462.1
出版年,卷(期):页码:2019,47(1):0-0
DOI:10.14062/j.issn.0454-5648.2019.01.05
摘要:

 采用提拉法生长了0.4%(摩尔分数)Yb2O3,0.4%Nd2O3和(0.5%、1.0%、2.0%)In2O3的3种同成分In:Yb:Nd:LiNbO3晶体。测试了掺杂晶体的紫外-可见吸收光谱和上转换发射光谱,探究了最优掺杂晶体的上转换发光强度与激发功率的关系。结果表明:随着In:Yb:Nd:LiNbO3晶体中In3+浓度的增加,晶体的紫外吸收边分别位于349、340、和338 nm处。采用980 nm二极管激光器激发获得的上转换发射光谱表明,上转换绿光的发射光强度最强,其次为上转换红光的发射强度,中心波段分别位于562、726 nm处,对应于Nd3+的4G9/2→4I11/2跃迁及4G9/2→4I15/2跃迁。2%In:Yb:Nd:LN晶体上转换荧光发射性能最优。根据不同激发功率测试,Nd3+的近红外发光属于单光子过程,上转换红光及上转换绿光发光属于双光子过程。

 Three congruent LiNbO3 single crystals doped with Yb2O3 (0.4%, in mole fraction), Nd2O3(0.4%) and In2O3 (0.5%、1.0%、2.0%) were grown by the Czochralski method. The ultraviolet-visible absorption spectra and up-conversion fluorescence emission spectra of In:Yb:Nd:LiNbO3 crystals were measured. The relationship between up-conversion luminous intensity and excitation power of optimum doped crystals was investigated. The results show that the absorption edge positions of In:Yb:Nd:LiNbO3 crystal are located at 349, 340 and 338 nm as In3+ ions concentration is increased. The up-conversion emission spectrum obtained by excitation with a 980 nm diode laser indicates that the green up-conversion emission center wavelength is located at 562nm, which is corresponding to Nd3+ ions 4G9/2 → 4I11/2 transition, and In:Yb:Nd:LiNbO3 crystal has the most intense luminous intensity. The red up-conversion emission center wavelength is located at 726 nm, which is corresponding to Nd3+ ions 4G9/2 → 4I15/2 transition. The optimum up-conversion fluorescence property of 2%In:Yb:Nd:LiNbO3 crystal can be obtained. The results of different excitation power tests show that the near-infrared up-conversion fluorescence of Nd3+ ions is a single photon process, and the green up-conversion fluorescence and the red up-conversion fluorescence of Nd3+ ions both are a two-photon process.

基金项目:
辽宁省联合基金项目(201602374)
作者简介:
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