Multi-core fiber based optical transmission structure and device applying same

The invention provides a multi-core fiber based multipath parallel optical transmission structure, comprising multiple single mode/multimode fibers and multiple multi-core fibers, wherein multiple single mode/multimode fibers and multiple multi-core fibers are alternately connected. By applying the optical transmission structure, the power loss during the optical coupling process can be reduced, and the influence of a high order mode to an optical path can be weakened.