自拉曼激光晶体Er:PbWO_4的光谱性质研究  

Study on Spectral Properties of Self-stimulating Raman Crystal Er:PbWO_4

作　　者：熊巍[1] 陈良[1] 袁晖[1] 

机构地区：[1]中国科学院上海硅酸盐研究所中国科学院透明光功能无机材料重点实验室,上海200050

出　　处：《人工晶体学报》2010年第1期5-9,共5页Journal of Synthetic Crystals

基　　金：国家高技术发展研究计划(863)(No.2009AA03Z435)

摘　　要：采用坩埚下降法生长出大尺寸Er:PbWO4晶体,通过对晶体顶端和靠近晶种端的吸收光谱、自发拉曼散射光谱、荧光发射寿命和980nmLD泵浦下红外荧光光谱的测试,分析讨论了Er:PbWO4晶体的自拉曼光谱性质。对纯PbWO4晶体的自发拉曼散射光谱的振动模式进行了简单的分析和指认,指出其强度最大的振动模位于903cm-1,对应于W-O对称伸缩振动模Ag。结合Er3+的红外波段荧光光谱及荧光寿命的测试,研究了介质PbWO4将Er3+的1.5μm发光拉曼频移获得中红外发光的可能性。Large size Er∶PbWO4 crystal was grown by Bridgman method.The self-stimulating Raman properties of the crystal samples cut from the seed and top end of as-grown ingots were discussed through the analysis of optical absorption spectra,spontaneous Raman scattering spectra,fluorescence lifetime and infrared luminescence under 980 nm LD excitation.All vibration modes in the Raman spectra were simply analysed and identified.The tetragonal PbWO4 crystal displays a very strong peak at 903 cm-1,which belongs to the totally symmetrical Ag optical modes of its tetrahedral WO2-4.Combining with the results of infrared emission and fluorescence lifetime of Er3＋,we researched the possibility that the 1.5 nm luminescence of Er3＋ can be Raman shifted to mid-infrared region by PbWO4 crystal.

关 键 词：自受激拉曼 中红外发光 PBWO4晶体 

分 类 号：TN244[电子电信—物理电子学]