This document discusses the coherent combination of multiple high-power zigzag slab lasers to produce a single output beam with increased power. It references a 2006 Optics Letters paper that demonstrated the successful coherent combination of zigzag slab lasers to produce an output greater than the sum of the individual lasers. It also references a 2007 conference paper on a 15 kW near-diffraction-limited single-frequency Nd:YAG laser that utilized this coherent combination technique.