the cof optical switch module and cof optical switch subsystem are powerful tool to switch optical signal at nano-second speed. the cof optical switch subsystems are equipped with cof switches and high-speed drive in 19 inch cases. features features high-speed switching nano-second by low-voltage driving low-power coumption minimal-power by low-voltage driving low polarization dependence polarization ieitivity by material nature low iertion loss reduced by buried waveguide structure excellent stability stability by inorganic crystalline nature compact size miniaturized by efficient material properties