CASTON is a world leading manufacturer of crystals. Under a stable QA system and with over 20 years professional techniques in growth and fabrication of Non-linear optical (NLO) crystals and Laser crystals, CASTON is capable of supplying large quantities of LBO, BBO, Nd:YVO4, Nd:YAG and TGG crystals with top quality, high damage threshold and competitive prices for both OEM and R&D customers.