Engineering Meter-Scale Laser Resistant Coatings for the near IR.

Stolz, C. J. ; Adams, J. J. ; Shirk, M. D. ; Norton, M. A. ; Weiland, T. L.

Technical Information Center Oak Ridge Tennessee

关键词: Coatings;    Lasers;    Optical systems;    Damage;    Defects;   

RP-ID  :  DE2006875656

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Laser resistant coatings are needed for beam steering (mirrors), pulse switching (polarizers), and high transport efficiency on environmental barriers (windows / lenses) on large laser systems. A range of defects limit the exposure fluence of these coatings. By understanding the origin and damage mechanisms for these defects, the deposition process can be optimized to realize coatings with greater laser resistance. Electric field modeling can provide insight into which defects are most problematic. Laser damage growth studies are useful for determining a functional laser damage criteria. Mitigation techniques such as micro-machining with a single-crystal diamond cutting tool or short pulse laser ablation using the burst technique can be used to arrest growth in damage sites to extend optic lifetime.