Beam shaping to suppress phase mismatch in high power second-harmonic generation

A set of guidelines is presented for designing high-power second-harmonic generation experiments or systems which are based on beam shaping techniques such as beam fanning and beam scanning. Performance limits imposed by existing crystal quality and growth technology are defined using cesium di-hydrogen arsenate as an example. A flow chart summarizing a step-by-step design approach for high-power second-harmonic generation, starting with laser and ending with the shape of the beam, is given.