近化学计量比Fe:LiTaO_3晶体的光折变性能  

Photorefractive property of near-stoichiometric Fe:LiTaO_3 crystal

作　　者：郑威[1] 姜凯丽[1] 

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

出　　处：《哈尔滨商业大学学报（自然科学版）》2009年第5期600-603,共4页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金：哈尔滨青年基金资助项目(2005AFQXJ033)

摘　　要：采用顶部籽晶溶液法（TSSG），生长直径约10-15mm，长度为10mm的近化学计量比掺铁铌酸锂（Fe：SLN）和近化学计量比掺铁钽酸锂（Fe：SLT）晶体．采用二波耦合全息法测量了晶体的记录时间，擦除时间和饱和衍射效率；采用光斑畸变法测量了抗光损伤阈值．与Fe：SLN晶体相比，Fe：SLT晶体的饱和衍射效率降低，记录时间减小，抗光损伤能力显著提高，Fe：SLT晶体的抗光损伤闽值为420MW／cm^2。Fe-doped near-stoichiometric LiTaO3 （ Fe： SLT） and Fe-doped near-stoichiometric LiNbO3（Fe： SLN） crystals with about 10- 15 mm in diameter and 10 mm in length are grown by using TSSG technique. The recording time, saturating diffracting efficiency and erating time of crystals are measured with two wave coupling method. The optical damage threshold is determined by facula deformation method. Compares with Fe： SLT crystal, Fe： SLT exhibits a lower diffracting efficiency and a faster responding speed, especially a much higher optical damage resistance ability, and the optical damage threshold of Fe： SLT crystal is about 420 MW/cm^2.

关 键 词：近化学计量比钽酸锂晶体 光折变性能 TSSG技术 光损伤 

分 类 号：O734[理学—晶体学]