Abstract

Advances in growth of the birefringent crystals ZnGeP2 and CdSiP2, as well as all-epitaxial processing of orientation-patterned semiconductors GaAs (OP-GaAs) and GaP (OP-GaP), are extending solid-state laser output deep into the mid-infrared. These materials exhibit the highest nonlinear coefficients and broadest infrared transparency ranges among all practical nonlinear optical crystals. In this review paper we describe the attractive properties of these materials, along with the unique capabilities and novel crystal growth and processing that continue to provide record-breaking conversion efficiencies and output powers in the mid-infrared.

© 2016 Optical Society of America

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