Multicast optical switch based on free-space transmission

摘要

A multicast optical switch based on free-space transmission comprises a 1×M input collimator array, a light splitting device, an optical distance compensation device, a spot transformation device, a 1×N output collimator array and a reflector array which are arranged in sequence. The 1×N output collimator array corresponds to reflector array. The light splitting device is provided with a light splitting surface and a reflection surface, and by means of light splitting surface and reflection surface, light splitting and beam splitting of n times are carried out on input signals of 1×M input collimator array, and then N beams of sub-signal light are generated. The optical distance compensation device compensates optical distance differences among M×N sub-signal light beams produced by light splitting device. The M×N sub-signal light beams are focused to be 1×N light spots through light spot conversion device, and then 1×N light spots are reflected to reflector array.