Abstract
Basic properties of the fourth harmonic conversion of 1.053-μm laser radiation with KDP crystals are experimentally determined. Optimization of crystal thickness, based on numerical simulations is discussed. A large aperture conversion cell combining second and fourth harmonic generators has been designed. Overall conversion efficiencies (ω → 4ω) in excess of 40% have been achieved for incident laser intensities between 1 and 2.5 GW/cm2.
© 1985 Optical Society of America
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