%0 Journal Article
%T Intensity distribution of the flat-topped beam propagating through the thick nonlinear medium with defects<br>平顶光束经表面有缺陷的厚非线性介质后的光强分布
%A Chen Xue-Qiong
%A Chen Zi-Yang
%A Pu Ji-Xiong
%A Zhu Jian-Qiang
%A Zhang Guo-Wen
%A <br>陈雪琼
%A 陈子阳
%A 蒲继雄
%A 朱健强
%A 张国文
%J 物理学报
%D 2013
%I 
%X Based on the nonlinear Schr dinger equation and Fourier transformation, the intensity distributions of the high power flat-topped beam propagating in the nonlinear medium and the free space are studied. The influences of the defects on medium surface on the intensity evolution of flat-topped light beam in the medium and the free space are analyzed. The results show that the larger the beam order, the poorer the beam self-focusing property is, and the closer to the back surface of the medium the position related to the maximal intensity point is a stronger initial intensity, a thicker medium or a higher nonlinear coefficient will lead to a stronger self-focusing property. The defects on the surface of medium will produce a relatively large intensity, closer to the back surface of medium. The effect of the phase modulated defect on the intensity evolution is greater than that of amplitude modulated defect.
%K flat-topped beam
%K self-focusing
%K defect
%K intensity distribution<br>平顶光束
%K 自聚焦
%K 缺陷
%K 光强分布
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=530695581BF85784BFEDD1F0789DF222&yid=FF7AA908D58E97FA&iid=E158A972A605785F&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0