Improving Resource of Metal Mirrors for Powerful Lasers

Cleaning of laser mirrors made of copper, its alloys and similar materials from operational and technological contamintions by mechanical rubbing using conventional solvents may be accompanied by scratches. Non-contact cleaning has its disadvantages, such as low efficiency of solvents and instability of their properties during storage and use. The diagnostics of the threshold of optical breakdown, the lifetime of the operation of mirrors and the strength of the coatings applied on them made it possible to find azeotropic mixtures of more effective solvents. In this paper, methods of stabilizing their physicochemical properties are investigated and proposed. Stabilization of halogenated hydrocarbons occurs with a decrease in the boiling temperature and an increase in stability during rectification purification of contaminated solvents for reuse by applying azeotropic mixtures based on them. We have shown that it is efficient to use azeotropic mixtures based on halogenated halogen-substituted hydrocarbon-acetone (2-butanone) -ethanol for the purification of metal optics. Such azeotropic mixtures are the most effective cleaning media, which retain stability of properties and ensure maximum and rapid removal of impurities without damage to the surface.