Application of resonance domain diffractive optics beam deflectors to high-power laser systems

Abstract

We report on various novel uses of resonance domain diffractive optics. Here we primarily concentrate on the design of optical elements that act as 90° beam deflectors for a high-power laser. Two of the elements were binary surface relief gratings, one acting as a highly reflecting leaky waveguide and the second was a transmission grating operating at Bragg incidence. Both of these devices could be optimized for efficiencies approaching 100%. A third device consisting of dielectric micro prisms was also considered. The results have direct relevance to moderate to high power laser systems, where laser induced damage is a potential limiting factor for any multi-layer thin film or bulk optical element.