Patent ID: 7054523

Claim:
An optical waveguide member comprising: a multi-mode optical waveguide which is surrounded on a core exterior thereof by a clad, and a plurality of first single-mode optical waveguides which are coupled optically to a first end face of said multi-mode optical waveguide, said multi-mode optical waveguide being a multi-mode optical waveguide having a multi-mode interference effect, which performs optical multiplexing and optical demultiplexing in accordance with the multi-mode interference effect, and which is structured to directly couple optically on a second end face thereof, which is opposite to the first end face, with a single-core single-mode fiber; wherein at a position contiguous to the second end face of said multi-mode optical waveguide, a groove structure for holding an optical fiber to be coupled optically to the second end face of said multi-mode optical waveguide is set.