Active Fresnel Rhomb zig-zag slab amplifier: design and test

Zig-Zag-Slab-Amplifier had active element 4.5 X 40 X 43 cm 3 in dimensions, six-bounce geometry of beam pass, pump cavity with transverse lamp orientation, and diffuse reflectors. Tests showed: the gain is equal to 8 per single pass at 77 kJ of pumping; its non-uniformity over about half of amplifier aperture is less than +/- 2.5 percent; the depolarization distortion over operating area is less than 0.5 percent.