Details
Zinc-Germanium Diphosphide (ZnGeP2, ZGP) single crystals are highly-effective non-linear optical crystals for the mid-IR as well as terahertz range. ZnGeP2 crystals have positive birefringence which allows to carry out phasematched parametric frequency conversion of optical radiation in all the ranges of their background transparency spectrum from 0.75 to 12.0 µm. Its useful transmission range lies from 2.1 to 10.6 µm with absoprtion of lower than 0.04 cm-1. ZnGeP2 has large non-linear optical coefficient and a relatively high laser damage threshold.
