High reflectance coatings for ellipsidal reflectors used in YAG lasers

A kind of design and manufacturing techniques for high-reflectance coatings of YAG lasers ellipsidal reflectors are introduced in this paper.The statistical global-extreme-value method and Powell conjugate direction method are used in optimizing design.Effect of dispersion and systemetical error are considered.Thus a practical and easily made high-reflectance coating system with simple construction is achieved.