Demonstration of Color Separation with 2ω KDP Wedge in High Power Laser Facilities

Abstract

A 2𝜔 wedge design is proposed with KDP crystal to disperse the unconverted light away from the target in a high power laser facility for inertial confinement fusion. The ultraviolet 𝐵-integral problem is released, and about 1.2 times in color separation angle is achieved according to both theoretical and experimental investigations when compared with conventional 3𝜔 wedge. The frequency conversion efficiency is unaffected when the wedge is along the non-sensitive axis of the tripler.