BGS(BaGa₄S₇) Crystals

BaGa₄S₇(barium gallium sulfide, BGS)crystal is a mid-infrared nonlinear crystal with wide band-gap and stable chemical properties. It has a wide light transmission range, with a UV cutoff edge of 350nm (band-gap width3.54eV)and an infrared cutoff edge of 13.7um.It also has a high nonlinear coefficient and a high damage threshold. In addition, BaGa₄S₇ crystal has no two-photon absorption at lμm,and can be used for OPO pumped by1064nm Nd:YAG lasers, especially suitable for using the1030nm fs laser, which is relatively mature in the market, as a pump source to generate various nonlinear frequency conversions such as OPA, DFG, SFG, OPG, etc.