Glass A J, Guenther A H
Appl Opt. 1973 Apr 1;12(4):637-49. doi: 10.1364/AO.12.000637.
In the application of high-power lasers, damage to active laser materials, and to components of laser system, generally determines the limit of useful laser performance. Accordingly, there is great interest in reducing the susceptibility of optical elements ot damage. Damage in transparent dielectrics arises from three major causes, particulate inclusions or microinhomogeneities in the material, self-focusing within the materials, and surface damage due to plasma formation. The state of understanding of these phenomena, and the thresholds observed, where they have been determined, will be discussed. Dependence on pulse length will also be considered. Although most of the research accomplished to date on laser damage has concentrated on Nd-glass, the advent of very high-powered gas lasers has stimulated interest in the development of damage resistant component materials for use in the ir. Crystalline dielectrics appear to be the most likely candidate materials for ir windows. Nonlinear optics materials are particularly susceptible to damage, since they are generally exposed to high intensity radiation. Asa final item, damage in thin film dielectric coatings are considered.
在高功率激光器的应用中，活性激光材料以及激光系统部件的损伤通常决定了有用激光性能的极限。因此，人们对降低光学元件的损伤敏感性极为关注。透明电介质中的损伤源于三个主要原因，即材料中的颗粒夹杂物或微观不均匀性、材料内部的自聚焦以及等离子体形成导致的表面损伤。将讨论对这些现象的理解状态以及已确定的损伤阈值。还将考虑对脉冲长度的依赖性。尽管迄今为止关于激光损伤的大部分研究都集中在钕玻璃上，但极高功率气体激光器的出现激发了人们对开发用于红外波段的抗损伤部件材料的兴趣。晶体电介质似乎是最有可能用于红外窗口的候选材料。非线性光学材料特别容易受到损伤，因为它们通常会暴露在高强度辐射下。最后一项，将讨论薄膜电介质涂层中的损伤问题。
