物理学报2012，Vol.61Issue(2)：257-268,12.
高功率激光光束经颗粒污染后的近场衍射效应
Diffraction effect of high-power laser beams through contamination particles
摘要
Abstract
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.关键词
高功率激光光束/污染颗粒/小尺度自聚焦/热像Key words
high power laser beam/contaminant particle/small-scale self-focusing/hot-image分类
信息技术与安全科学引用本文复制引用
张国文,朱俭,卢兴强,曹华保,尹宪华,吕凤年,张臻,李菁辉,王仁贵,马伟新..高功率激光光束经颗粒污染后的近场衍射效应[J].物理学报,2012,61(2):257-268,12.基金项目
国家自然科学基金（批准号：60707019）资助的课题~~ （）
