Request InfoNonlinear Optical Crystal CASTECH INC.FUZHOU, China, Jan. 8 -- Beta-Barium Borate (b-BaB2O4 or BBO), discovered and developed by the Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, now is manufactured and marketed by Fujian Castech Crystals Inc. The high-quality crystal boule is steadily available with flux-method from Castech, which holds specialized proprietary techniques of the BBO crystal growth. 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