Boling N L, Crisp M D, Dubé G
Appl Opt. 1973 Apr 1;12(4):650-60. doi: 10.1364/AO.12.000650.
A summary of recent investigations of surface damage of transparent dielectrics is presented. Damage threshold measurements made on Owens-Illinois ED-2 laser glass at normal incidence and at Brewster's angle are reported. For 30-nsec pulses at normal incidence, exit surface damage thresholds are typically 100 J/cm(2) for ED-2 glass. The observed ratio between entrance and exit damage thresholds for the two geometries can be explained by considering the electric field strengths at the surfaces and including interference between incident and reflected light waves. A similar analysis is applied to surface damage that occurs during total internal reflection. Finally the morphology of surface damage of ED-2 laser glass is described, and a model based upon reflections from the laser induced plasma is proposed to explain the observations.
本文综述了近期对透明电介质表面损伤的研究。报道了在垂直入射和布儒斯特角下对欧文斯-伊利诺伊公司ED-2激光玻璃进行的损伤阈值测量。对于垂直入射的30纳秒脉冲，ED-2玻璃的出射表面损伤阈值通常为100 J/cm²。通过考虑表面的电场强度并计入入射光波与反射光波之间的干涉，可以解释两种几何构型下观察到的入射损伤阈值与出射损伤阈值之比。类似的分析也适用于全内反射过程中发生的表面损伤。最后描述了ED-2激光玻璃表面损伤的形貌，并提出了一个基于激光诱导等离子体反射的模型来解释这些观察结果。
