Planar multichannel single-fiber bidirectional device based on COB technology

The utility model relates to the technical field of optical fiber communication high-speed optical modules, and provides a planar multichannel single-fiber bidirectional device based on a COB technology, which comprises an optical fiber array assembly and a light splitting device which are located on the same horizontal plane, the optical fiber array assembly is provided with a first inclined plane and a built-in optical fiber, and an acute angle is formed between the first inclined plane and a vertical line perpendicular to the horizontal plane. The light splitting device is provided with a second inclined plane overlapped with the first inclined plane, the light splitting device is also provided with a third inclined plane, an acute angle is formed between the third inclined plane and a vertical line perpendicular to the horizontal plane, and the second inclined plane and the third inclined plane are oppositely arranged; an emergent light signal lambda1 sequentially passes through the third inclined plane,