Sc:Fe:LiNbO_3晶体的生长和光学性能研究  

Growth and Optical Properties of Sc,Fe Co-doped Lithium Niobate Crystals

作　　者：郑威[1] 桂强[1] 徐玉恒[1] 雷清泉[2] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,哈尔滨150040 [2]哈尔滨理工大学电气学院,哈尔滨150040

出　　处：《人工晶体学报》2007年第2期314-318,共5页Journal of Synthetic Crystals

基　　金：黑龙江自然科学基金项目(No.E200512);黑龙江省教育厅项目(No.10051049)

摘　　要：研究双掺Fe(0.03wt%Fe2O3)和Sc(0,1,2,3mol%)铌酸锂晶体全息存储性能.通过晶体红外光谱测试发现:Sc:Fe:LiNbO3晶体中Sc的掺杂浓度超过3mol%时,Sc:Fe:LiNbO3晶体的O-H吸收峰的位置从低掺杂时的3484cm-1移动到3508cm-1。采用光斑畸变法测得(3mol%)Sc:Fe:LiNbO3晶体抗光损伤能力为3.3×103W/cm2,比Fe:LiNbO3提高了二个数量级。晶体的红外吸收光谱和抗光损伤能力显示:Sc的掺杂浓度为3mol%时具有明显的阈值特征。采用波长为632nm的He-Ne激光器作为光源,通过二波耦合方法测试晶体全息存储性能。实验表明:在一系列Sc:Fe:LiNbO3晶体中,Sc(2mol%):Fe:LiNbO3晶体能获得最佳的光折变灵敏度和动态范围。The holographic storage properties of Fe （0.03wt%. Fe2O3）： LiNbO3 doped with Sc in different levels （0, 1,2, 3mol. % ） have been investigated. The infrared spectrum of crystals shows that when Sc doping concentration in Fe： LiNbO3 is over 3mol% , O-H vibration absorption peak of Sc （3mol. % ）：Fe：LiNbO3 is shifted to 3508 cm^-1, comparing with 3484cm^-1 of crystals with lower Sc doping level. By the light spot deformation method the threshold intensity （wavelength 488nm） of Sc （3mol. % ） ：Fe：LiNbO3 is 3.3×102W/cm^2, two The result of Infrared spectrum and optical damage orders of magnitude higher than that of Fe：LiNbO3. resistance ability measurement shows that Sc threshold concentration in Fe：LiNbO3 is about 3mol%. Holographic storage properties of crystals are determined using He-Ne laser with wavelength of 632.8nm as light source by two-wave coupling method. It has been found that, in terms of holographic storage properties is best when the optimal doping concentration of Sc is 2mol% among this crystal series.

关 键 词：铌酸锂晶体 掺钪 全息存储性能 

分 类 号：O782[理学—晶体学]