物理学报Issue(13)：1-9,9.DOI:10.7498/aps.63.134201
表面颗粒污染物诱导薄光学元件初始损伤的机理*
Mechanism of original damage of thin optical comp onents induced by surface particle contamination
摘要
Abstract
Based on the optical transmission theory, the reason why front-surface particle contamination may induce the original damage of thin optical components is considered, and a damage mechanism is put forward: The localized thermal deformation of an optical element induced by the thermal effect of particle contamination together with the shading effect of it can disturb the laser beams. Simulated results show that for a high power laser, the localized thermal deformation of thin optical components, which disturbs the laser beam, is an important cause to produce strong light intensity modulations. The surface shape, phase delay, and thermal diffusion length of a localized thermal deformation are constantly changing with the increase of laser pulse shot number, so the highest light intensity modulation will be produced at different positions in the thickness direction or the xy direction on the rear-surface of an optical element. This not only can easily induce some damages on the rear-surface of the optical element, but also cause the interior damages scattered in the thickness direction.关键词
激光损伤/光传输/颗粒污染物/热变形Key words
laser damage/optical transmission/particle contamination/thermal deformation引用本文复制引用
孙晓艳,雷泽民,卢兴强,范滇元..表面颗粒污染物诱导薄光学元件初始损伤的机理*[J].物理学报,2014,(13):1-9,9.基金项目
国家自然科学基金(批准号:60707019)资助的课题.@@@@Project supported by the National Natural Science Foundation of China (Grant No.60707019) （批准号:60707019）
