Patent ID: 8889251
Filing Date: 2014-11-18
Classification: B32B,C23C,H01S,Y10T

Abstract:
1. A multilayer dielectric coating, the coating comprising: more than two alternating layers of high and low index dielectric materials disposed upon a window or a reflector of an alkali laser, wherein an innermost layer of the more than two alternating layers of high and low index dielectric materials comprises at least one of: alumina, zirconia, and hafnia for protecting subsequent layers of the more than two alternating layers of high and low index dielectric materials from alkali attack, wherein the more than two alternating layers of high and low index dielectric materials comprises at least one of: wherein the innermost layer is a layer configured to be in direct contact with an alkali vapor on an alkali-contacting side of the multilayer dielectric coating.