强激光与粒子束2011，Vol.23Issue(8)：2101-2105,5.DOI:10.3788/HPLPB20112308.2101
纳秒强激光诱导K9玻璃表面损伤实验
Laser-induced damage on K9 surface under nanotosecond irradiation
摘要
Abstract
The lifetime of a laser optics is limited by laser-induced damage and subsequent growth of laser initiated damage area. Morphology and growth of laser-induced damage on polished K9 glass surface and inside of the material have been measured after single-shot laser irradiation at 1 064 nm wavelength and approximately 10 ns pulse duration. Differential interference contrast (DIC) optical microscopy, SEM are used for imaging the damage sites. All of the observed damage is concentrated on the optics surface, and the output surface damage is more visible and serious than input surface. For input surface, plasma produced by laser pulse shields the material and reduces material destruction, symmetrical craterlet and microcrack is produced by ablation effect and laser-supported detonation wave(LSDW). For output surface, the interference of incident laser with the reflected laser from rear surface, the absorption zone moves toward the beam and laser energy is deposited inside of the optical material, sub wavelength pe riodic grating microstructure and damage-spot are observed. The damage morphology and damage mechanisms are compared for input and output surface, possible reasons for the observed initiation growth behavior are discussed.关键词
激光诱导损伤/K9玻璃/损伤形貌/损伤增长/表面微裂纹/周期性结构Key words
laser-induced damage/K9 glass/damage morphology/damage growth/surface microcrack/periodic grating microstructure分类
数理科学引用本文复制引用
邱荣,王俊波,李晓红,施鹏程,刘浩,马平..纳秒强激光诱导K9玻璃表面损伤实验[J].强激光与粒子束,2011,23(8):2101-2105,5.基金项目
国家自然科学基金委员会中国工程物理研究院联合基金项目(10976025/A06) （10976025/A06）
