Optical signal transmission device applying alternative and selectable transmission paths

An optical signal transmission device configured for transmitting light rays from a plurality of light emitters to a plurality of light receivers, the optical signal transmission device comprising:

• a substrate comprising a first side surface and a second side surface opposite to the first side surface;
• a plurality of first optical waveguide elements being substantially parallel with each other, and formed in the substrate;
• a plurality of second optical waveguide elements being substantially parallel with each other, and formed in the substrate, the second optical waveguide elements intersected with the first optical waveguide elements, and thus forming a plurality of hollow junctions at cross portions of the first optical waveguide elements and the second optical waveguide elements to change the optical transmission path of light rays;
• a plurality of reflectors corresponding to the hollow junctions, and received in the respective hollow junctions, the reflectors being capable of rotating around a rotating shaft thereof in the respective grooves;
• and
• an integrated circuit configured for controlling rotating angles of the reflectors;
• wherein the first optical waveguide elements pass through the first side surface and the second side surface, the light emitters are positioned on the first side surface corresponding to the first optical waveguide elements, and the light receivers are positioned on the second side surface, and are corresponding to the first optical waveguide elements.