固体污染物对Al₂O₃激光诱导热损伤影响的仿真研究

Simulation Study on the Effect of Solid Contaminants on the Laser-Induced Hot Damage of Al₂O₃

Al2O3是高功率激光装置中广泛应用的材料,其在激光辐照工作时表面由于缺陷产生损伤,进而产生的大量污染物会造成光学元件性能严重下降,是制约高功能激光装置进一步发展的主要因素之一。表面损伤主要是由于表面依附污染物引起的,其中,固体污染物又是最主要的诱发损伤源,因此,研究固体污染物对Al2O3表面抗激光损伤性能的影响就显得尤为重要。本文针对固体类无机污染物对Al2O3表面影响进行了研究,对不同类型、不同尺寸的固体污染物对Al2O3表面温度的影响进行了仿真研究,发现当Al2O3表面存在污染物时,更容易发生激光损伤,且不同种类、不同尺寸污染物对Al2O3激光损伤的影响不同。

Al2O3 is the most widely used in high power laser material, the surface damage at work can cause serious decline, optical device performance is the main factor restricting the development of high functional laser device further. One of the surface damages is mainly caused by the surface at-tachment of contaminants, among them, the solid contaminants are the main source of induced damage, therefore, research on the surface of Al2O3 solid contaminants laser damage resistance of the impact is particularly important. Effect on surface of Al2O3 based on solid inorganic contami-nants was studied, with different types, different size of the surface of the solid pollutants of Al2O3 are simulated to examine the effects of temperature, and found that when Al2O3 surface contami-nants, laser damage is more likely to occur, and different types, different sizes of contaminants have different effects on Al2O3 laser damage.