A high-efficiency multi-beam splitter for optical pickups using ultra-precision manufacturing
We propose a seven-port beam splitter grating with novel double-groove structure. High efficiency of 91.81% energy is designed to split into the ?3T to +3T orders. The double-groove structure was fabricated using ultra-precision manufacturing. The deviation between the measured results and theoretically values is only 2.99%. It holds a high potential for mass production.
beam splitters ultra-precision manufacturing diffraction gratings optical data storage