近化学计量比Zn:LiTaO_3晶体的生长和抗光折变性能  

GROWTH AND PHOTOREFRACTIVE RESISTANCE PROPERTIES OF NEAR-STOICHIOMETRIC Zn:LiTaO_3 CRYSTAL

作　　者：郑威[1] 王东鹏[2] 徐玉恒[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]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《硅酸盐学报》2009年第11期1829-1832,共4页Journal of The Chinese Ceramic Society

基　　金：哈尔滨青年基金(2005AFQXJ033)资助项目

摘　　要：采用顶部籽晶溶液法,生长了直径约15mm,长度为10mm的近化学计量比钽酸锂(near-stoichiometric Li TaO3,SLT)和Zn掺杂的近化学计量比钽酸锂(Zn:SLT)晶体。生长的晶体无色透明,没有宏观缺陷。通过X射线粉末衍射法测试晶体结构和晶格参数,Zn:SLT晶体的晶格参数小于未掺杂的SLT晶体。与同成分钽酸锂晶体相比,SLT晶体的抗光损伤能力显著提高,Zn:SLT晶体的抗光损伤阈值大于500MW/cm2。Near-stoichiometric LiTaO3（SLT） and Zn-doped near-stoichiometric LiTaO3（Zn：SLT） crystals about 15 mm in diameter and 10 mm in length were grown by the top seeded solution growth method.The crystals grown are colorless and transparent and without macro-defects.The lattice constant of the Zn：SLT calculated by X-ray powder diffraction is smaller than that of the SLT.Compared with congruent LiTaO3 crystals.The SLT exhibits much higher optical damage resistance,and the optical damage threshold of the Zn：SLT crystal is more than 500 MW/cm^2.

关 键 词：近化学计量比钽酸锂晶体 锌掺杂 顶部籽晶溶液生长法 光损伤 

分 类 号：O734[理学—晶体学]