ZGP Crystal mid-IR nonlinear crystal – LASER CRYLINK Description ZnGeP2 （ Zinc germanium phosphide ） crystal has many good properties and is an mid-IR nonlinear crystal. The nonlinear susceptibility of ZnGeP2 (ZGP) crystal is approximately 160 times large (d36~75 pm/V) as KDP, ZGP shows good optical transparency over the 740 – 12000 nm and relatively high laser damage threshold and is therefore well suited for producing near infrared tunable laser. ZGP is a very hopeful material for mid-infrared devices such as SHG, SFG, OPO, and OPG/OPA. laser crylink Feature · Nonlinear coefficient is large · The region of transmission is from 0.74 um to 12um · High relative damage threshold · High thermal conductivity · The region of transparency is wide · ...