Photorefraction Resistance of Na_(2)O-Doped Lithium Niobate Single Crystals  

作　　者：KONG Yong-fa WEN Jin-ke YANG Zheng-fang 孔勇发;温金珂;杨正方(Department of Physics,Nankai University,Tianjin 300071;Department of Materials Science and Engineering,Tianjin University,Tianjin 300072)

机构地区：[1]Department of Physics,Nankai University,Tianjin 300071 [2]Department of Materials Science and Engineering,Tianjin University,Tianjin 300072

出　　处：《Chinese Physics Letters》1997年第8期629-632,共4页中国物理快报（英文版）

摘　　要：Na_(2)O-doped(up to 3mol%Na in the melt)LiNbO_(3) crystals have been grown by the Czochraski method.The experimental results show that Na_(2)O dopants can increase the ability of LiNbO_(3) to resist light-induced optical damage,but the photorefraction of LiNbO_(3):Na(3 mol%)is larger than that of LiNbO_(3):Na(1 mol%)and the absorption edge of the former crystal has a longer wavelength compared with that of the latter.These two abnormal phenomena were interpreted as that some ilmenite structure(NaNbO_(3))regions are formed in doped LiNbO_(3) crystals with the increasing dopant concentration of Na_(2)O.

关 键 词：method. REFRACTION latter 

分 类 号：O61[理学—无机化学]