可有效实现3μm中红外波段激光输出的稀土掺杂LiYF4单晶体研究

项目名称： 可有效实现3μm中红外波段激光输出的稀土掺杂LiYF4单晶体研究

项目编号： No.51272109

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 夏海平

作者单位： 宁波大学

项目金额： 80万元

中文摘要： 3微米中红外激光在民用及军用领域具有重要的应用。本项目以获得一种可高效实现3微米激光输出的稀土离子掺杂优质大尺寸氟化钇锂单晶的坩锅下降法关键制备技术与增强中红外发光机理研究为目标。以Er3+为主要研究的中心发光离子，通过Nd3+、Pr3+、Tm3+等稀土离子的敏化作用，实现4I11/2→4I13/2能级跃起的中红外高效发光。研究稀土掺杂LiYF4晶体的坩锅下降法生长条件及晶体的中红外发光特性及理想掺杂浓度与种类。通过光谱特性研究3μm产生的发光机理及其影响因素，实现增强3μm光谱性能的优化。以此晶体为材料，加工成激光棒，并对激光棒的中红外激光输出特性进行深入分析。稀土离子掺杂的LiYF4晶体可望具备热学、物化、机械强度、光学透过及中红外发光等综合性能优良的特性，有望获得高效的3μm激光输出。本项目研究工作对探索我国新型中红外激光晶体材料具有重要意义，为今后在中红外激光材料与器件的研制及产

中文关键词： 3 微米；氟化钇锂晶体；稀土离子；晶体生长；

英文摘要： Laser at 3μm mid-infrared wavelength has a very important applications in civilian and military. This project aims to develop key techniques of a Bridgman method that is used to produce large size and high quality rare earth ions doped LiYF4 single crystal of highly efficient output of 3μm mid-infrared wavelength laser on one hand, and on the other ascertain the mechanism of enhanced intensity for emission at 3μm mid-infrared wavelength. The Er3+ ion will be taken as main researching luminous center, and the emission with high efficiency of Er3+ ion from 4I11/2 to 4I13/2 transition will be realized by introducing Nd3+,Pr3+,Tm3+, et al. into crystal as sensitizers. We intend to study the growth parameters of the rare earth doped YLiF4 single crystals, optical spectra of 3μm mid-infrared wavelength,ideal doping concentration and doping rare earths. Enhancing the performance of 3μm laser emission will be realized in terms of identifying the mechanisms and affecting factors for Er3+ ion florescence will be identified from their optical spectra.The laser rod of rare earth doped LiYF4 crystal will be processed from the obtained LiYF4 crystal. The performance of 3μm laser output of the rod will be investigated and analysized. It is proposed that the rare earth ions doped LiYF4 single crystals possess comprehensive per

英文关键词： 3μm；LiYF4 single crystal；rare earth ion；crystal growth；