硅酸盐学报

氧化还原处理对Mg:Ce:Cu:LiNbO_3晶体光折变性能的影响

作者：范叶霞王义杰李洪涛

单位：哈尔滨理工大学材料科学与工程学院哈尔滨理工大学应用科学学院哈尔滨工业大学材料科学与工程学院

分类号：Q6-33

出版年,卷(期):页码：2009,37(5):832-836

DOI：

摘要：

在同成分铌酸锂(LiNbO3,LN)晶体中,掺入的摩尔分数分别为0,1%,3%,6%MgO,掺入0.1%(质量分数,下同)CuO和0.05%CeO2,采用提拉法生长了优质的Mg:Ce:Cu:LN晶体,对生长后的晶体极化后分别进行了氧化和还原处理。测定了Mg:Ce:Cu:LN晶体的紫外-可见光吸收光谱和光折变性能。结果表明:与未经氧化和还原处理的晶体相比,在掺MgO量为1%和3%时,经氧化处理的晶体的吸收边发生了紫移,经还原处理的晶体的吸收边发生了红移;而在掺MgO量为6%时,氧化处理后晶体的吸收边紫移趋势不明显。氧化处理后晶体的抗光损伤能力R减弱,而还原处理后晶体的R增强;而当掺入MgO为6%时,Mg:Ce:Cu:LN晶体的R最大,Mg:Ce:Cu:LN晶体的R比Ce:Cu:LN晶体高2个数量级。结合铌酸锂晶体的锂空位缺陷模型解释了有关实验结果。

Mg:Ce:Cu:LiNbO3(Mg:Ce:Cu:LN) crystals doped with 0,1%(in mole,the same below),3%,6%MgO,and 0.10%(in mass,the same below) CeO2 and 0.05%CuO respectively were grown by the Czochralski method from congruent LN melting.After polarization,the crystals were oxidized and reduced.The ultraviolet-visible absorption spectra and the photorefractive properties of the three kinds of Mg:Ce:Cu:LN crystals were measured.The experimental results that compared to grown crystals,when doped-Mg content of 1% and 3%,the absorption edge of oxidized crystals is shifted to the violet band and that of reduced crystals is shifted to the infrared band,and at doped-Mg content of 6%,the absorption edge of oxidized crystals exhibited a no clear violet shift.The opti-cal damage resistance ability R of oxidized crystals decrease,and R of reduced crystals increase and R of reduced crystals doped with 6%Mg achieve maximum.The R of Mg:Ce:Cu:LN crystal is increased about 2 order of magnitude compared to that of Ce:Cu:LN crystal.Some related experimental results were explained based on Li-vacancy defect model.

基金项目：

作者简介：

参考文献：

[1]BUSE K,ADIBI A,PSALTIS D.Non-volatile holographic storage in doubly doped lithium niobate crystals[J].Nature,1998,393(7):665-668. [2]刘友文,刘立人,刘德安.用两种照明方法在LiNbO3:Cu:Ce晶体中实现非挥发全息存储[J].中国激光,2001,28(12):1099-1102.LIU Youwen,LIU Liren,LIU De’an.Chin J Lasers(in Chinese),2001,28(12):1099-1102. [3]DARWISH A M,AGGEARWAL M D,MORRIS J.Investigation of the charge transfer and photosensitivity in single and double doped linbo3single crystal,an optical-electron paramagnetic resonance study(part1)[J].SPIE,1997,3137:63-74. [4]王义杰,代丽,徐朝鹏.Mg:Ce:Fe:LiNbO3晶体生长及其全息存储性能[J].硅酸盐学报,2007,35(2):144-148.WANG Yijie,DAI Li,ZU Zhaopeng.J Chin Ceram Soc(in Chinese),2007,35(2):144-148. [5]SWEENEY K L,HALLIBURTON L E,BRYAN D A.Point defects in Mg-doped lithium niobate[J].J Appl Phys,1985,57(4):1036-1044. [6]LERNER P,LEGRAS C,DUMAS J P.Stoichiometrie des Monoc-ristaux de Metaniobate de Lithium[J].J Cryst Growth,1968,3/4:231-235. [7]KUKHTAREV N,MARKOV V,ODULOV S.Holographic storage in electro-optic crystals.I:steady state[J].Ferroelectrics,1979,22:949-960. [8]KUKHTAREV N,MARKOV V,ODULOV S.Holographic storage in electro-optic crystals II:beam coupling-light amplification[J].Ferroel-ectrics,1979,22:961-964. [9]VOLK T,MAXIMOV B,CHERNAYA T.Photorefractive properties of LiNbO3:Zn crystals related to the defect structure[J].Appl Phys B,2001,72:647-652. [10]BURR G W,PSALTIS D.Effect of the oxidation-state of LiNbO3:Fe on the diffraction efficiency of multiple holograms[J].Opt Lett,1996,21:893-895. [11]孙程军,许士文,张中兆.氧化还原对Fe:LiNbO3全息光栅热固定的影响[J].压电与声光,2000,22(2):101-103.SUN Chengjun,XU Shiwen,ZHANG Zhongzhao.Piezoelectr Acous-toopt(in Chinese),2000,22(2):101-103.

服务与反馈：

【文章下载】【加入收藏】