掺杂LN晶体光折变效应及图象光存储特性  

Photorefractive Effect and Image Storage Properties of Doped LN Crystals

作　　者：许心光[1] 许贵宝[1] 王正平[1] 胡大伟[1] 邵宗书[1] 徐悟生[2] 徐玉恒[2] 

机构地区：[1]山东大学晶体材料国家重点实验室,济南250100 [2]哈尔滨工业大学应用化学系,哈尔滨150001

出　　处：《人工晶体学报》2003年第5期427-432,共6页Journal of Synthetic Crystals

基　　金：国家973课题(G19990330);国家863课题(2001AA31304)资助项目

摘　　要：利用514.5nm和632.8nm波长的激光,研究了单掺杂Fe和双掺杂Ce:Fe离子铌酸锂晶体的光折变二波耦合及光折变全息存储特性。实验结果表明生长态双掺杂Ce:Fe与单掺杂Fe的LiNbO_3晶体的光折变波耦合增益差异不明显,但双掺杂Ce:Fe的LiNbO_3晶体的图象存储和擦除特性明显得到改善。氧化态样品具有较大的透过率光谱范围和较好的图象存储质量;还原态样品具有较大的光折变二波耦合增益特性。Photorefractive holographic storage and two-wave mixing properties were studied in Fe-doped and Ce:Fe doubly doped LiNbO3 crystals by using laser with 632. 8nm and 514.5nm. The experimental results show that the properties of photorefractive effect two-wave mixing are not different comparing the Fe-doped with Ce: Fe doubly doped LiNbO3 crystals. The property of image storage and reading out is improved distinctly in Ce:Fe doubly doped LiNbO3 crystals. The larger optical transmission spectrum range can be obtained in the oxidized samples. And the greater gain of photorefractive effect two-wave mixing can be obtained in reduced samples.

关 键 词：铌酸锂晶体 光折变效应 图象存储 透过率光谱 掺杂 Fe LINBO3晶体 铁 

分 类 号：TQ59[化学工程—精细化工] O78[理学—晶体学]