Fujian Fu technology co., Ltd. (CASTECH) short name: Fu-crystal company. the major lens materials and device research and development, production and sales, its products are widely used in the field of lasers and optical communications. the company is headquartered in Fuzhou City, has a modern 8-storey office and production building, total area more than 10,000 square meters, employs nearly 900 people.

after nearly 20 years of unremitting efforts, Fu grain company is now the world's leading provider of LBO, BBO, Nd:YVO4 and the Nd:YVO4+KTP-bonded Crystal manufacturers. the company development of molten salt method, Rafa and water solution, and so a variety of crystal growth technology, with IAD,IBS,EB and so on many kinds of coating and processing technology to adapt to different application requirements. testing technology and equipment of the company is the industry leader, with multiple test instruments such as Zygo,Nikon,Prism Master, and major laser company in the world to establish a good information exchange platform. the company in 2001 passed the ISO9001 quality system certification. at the same time the company is committed to brand-building over the years, in the major industrial countries and regions in the world is equipped with an agent or a branch. more than 90% products exported to the United States, Japan, Germany and other countries such as America, Europe, Asia, international trade as China crystal. LBO Crystal in China, the United States and Japan have crystal growth and device application patent.

Fu crystal company spirit of "unity, progressive, pragmatic, innovative" spirit of enterprise culture, "as best global supplier of nonlinear optical crystals and laser crystals" of company objectives and efforts.