%0 Journal Article
%T Diffraction effect of high-power laser beams through contamination particles<br>高功率激光光束经颗粒污染后的近场衍射效应
%A 张国文
%A 卢兴强
%A 曹华保
%A 尹宪华
%A 吕凤年
%A 张臻
%A 李菁辉
%A 王仁贵
%A 马伟新
%A 朱俭
%J 物理学报
%D 2012
%I 
%X The near-field diffraction characteristics when a high-power laser beam traverses contaminant particles are studied by using the designing software of high-power laser drivers-Laser designer. The modulations generated by contaminant particles are sorted. Then the influence of contaminant particles with amplitude or phase modulation on the near-field intensity distribution in vacuum or in fused silica is analyzed in great detail. The results show that in both vacuum and fused silica, the phase modulated contaminant particles have a greater influence on the near-field properties of high-power laser. Moreover, it is found that in fused silica, the small-scale self-focusing hot-image modulation of high-power laser induced by phase modulated hard-edge contaminant particles is momentous. But the lateral shift of high-power laser beam caused by contaminant particles maybe inhibits the small-scale self-focusing effect to some extent, thereby reducing the laser injury risk of optical component.
%K high power laser beam
%K contaminant particle
%K small-scale self-focusing
%K hot-image<br>高功率激光光束
%K 污染颗粒
%K 小尺度自聚焦
%K 热像
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=4C92C33EB4B06FC5D87BF19F03E0A277&yid=99E9153A83D4CB11&vid=1D0FA33DA02ABACD&iid=0B39A22176CE99FB&sid=683123099EC89210&eid=683123099EC89210&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=12