ZGP (ZnGeP2) Crystals for THz and middle infrared OPO and OPG/OPA

DIEN TECH offers ZnGeP2 ZGP crystals with super low absorption and high damage threshold. Large size available upon request. Zinc-Germanium Diphosphide (ZnGeP₂, ZGP) single crystals knowing as the king of nonlinar crystals, have super high nonlinear coefficient , it is a highly-effective nonlinear optical material for the middle IR, as well as terahertz range( low absorption at 1um). ZnGeP₂ crystals have positive birefringence which allows one to carry out the phasematched parametric frequency conversion of optical radiation in all the ranges of their background transparency spectrum from 0.75 to 12.0 µm. ZnGeP2 has the largest non-linear optical coefficient and a relatively high laser damage threshold. It was successfully used in the following applications: up-conversion of CO2 laser light to near IR range via mixing with 1.06 mm; sum frequency generation of CO and CO2 laser radiation; efficient SHG of pulsed CO, CO2 (49% efficiency at 1 GW/cm2 intensity of 2 ns pulses, 9.52 mm wavelength) and chemical DF-laser, OPO light generation in mid infrared when pumped by erbium and holmium lasers.