%0 Journal Article
%T Influence of dark irradiation on transition process from self-defocusing to self-focusing in LiNbO3:Fe crystals<br>在LiNbO3:Fe晶体中暗辐照对光束从自散焦向自聚焦转换过程的影响
%A Huang Chun-Fu
%A Guo Ru
%A Liu Si-Min
%A Shu Qiang
%A Gao Yuan-Mei
%A Wan Da-Yun
%A Liu Zhao-Hong
%A Zhang Xiao-Hua
%A Lu Yi
%A <br>黄春福
%A 郭儒
%A 刘思敏
%A 舒强
%A 高垣梅
%A 汪大云
%A 刘照红
%A 张小华
%A 陆猗
%J 物理学报
%D 2004
%I 
%X We have studied the dynamic propagation of an optical beam from self-defocusing to self-focusing in photovoltaic photorefractive crystals LiNbO 3:Fe in the framework of a two-dimensional band transport model. The results show that dark irradiation plays an important part in the transition process. The transition occurs only when the normalized dark irradiation is very small. We discuss also the influence of pyroelectric effect on the transition process.
%K photovoltaic photorefractive effect
%K dark irradiation
%K self-defocusing
%K self-focusing
%K LiNbO
%K 3:Fe<br>光生伏打效应
%K 暗辐照
%K 自散焦
%K 自聚焦
%K 铌酸锂晶体
%K 铁掺杂
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=7E4E9D55CB85296D&yid=D0E58B75BFD8E51C&vid=8E6AB9C3EBAAE921&iid=94C357A881DFC066&sid=7264799D7F648D02&eid=40295B54D40AE4B3&journal_id=1000-3290&journal_name=物理学报&referenced_num=1&reference_num=17