Scaling laws of optical components during laser induced thermal damage process

摘要

In order to study the scaling laws of optical components, we set up a model based on the heat conduction theory andthermodynamic theory. Then the similarity theory was used to the model analyzation. Finally, we demonstrate threeconclusions which are related to the practical engineering application. The first one is that thermal damage behaviors ofdifferent scale optical components are similar when the linear power density of irradiated laser are the same. In otherwords, we should use the linear power density to represent the resistance of damage tolerance for optical componentsThe second one is the judgement standard of scram time. We find the scram time of large-aperture system is certaintimes as much as the scram time of small-aperture system. The third one is about how to design the scaled experimentcan we make two different scale laser systems obey the similar thermal damage behaviors. This study is of great help forthe damage prevention of the optical components.