光学精密工程2017，Vol.25Issue(8)：1987-1994,8.DOI:10.3788/OPE.20172508.1987
激光预处理提升DKDP晶体加工表面的抗损伤能力
Improvement of laser damage resistance at surface of DKDP crystal by laser conditioning process
摘要
Abstract
In view of damage characteristics of crystal surface, the effect of laser conditioning process on the laser induced surface damage threshold of DKDP crystals was determined by combining raster scan pre-exposure and real-time damage event imaging technique.By simulating dynamic process of different defects exposed to intense nanosecond laser pulse, the mechanisms of the effect of laser conditioning process on rough and well polished surfaces were discussed separately.The results show that laser damage density of well polished surface is remarkably decreased by the laser conditioning process while laser damage resistance of the rough polished surface cannot be improved.The laser damage resistance is increased by 60% under given experimental conditions.By comparing effects of laser conditioning process on the well polished surface to that in the bulk, it indicates that damage resistance on the surface can be improved when laser damage resistance in the bulk is increased by laser conditioning process.Thereby the effect of laser conditioning process on surface damage threshold is related to that of bulk material.关键词
激光损伤/激光预处理/损伤阈值/预处理效果/氘化磷酸二氢钾(DKDP)Key words
laser damage/laser conditioning/damage threshold/laser conditioning effects/dopted deuterium KDP (DKDP)分类
信息技术与安全科学引用本文复制引用
罗阳,胡国行,赵元安,杨留江,曹珍,李大伟,刘晓凤..激光预处理提升DKDP晶体加工表面的抗损伤能力[J].光学精密工程,2017,25(8):1987-1994,8.基金项目
国家自然科学基金资助项目(No.61405219,No.11304328) （No.61405219,No.11304328）
