Patent ID: 8358887

Claim:
An optical waveguide with a light emitting device comprising: a light emitting device; and an optical waveguide including a core for guiding light emitted from the light emitting device to generate light beams, wherein the core is embedded in a cladding layer and the core has a refractive index higher than the cladding layer, the cladding layer comprises: an under-cladding layer; and an over-cladding layer, and the core is formed on the under-cladding layer and embedded by the over-cladding layer, the core comprises: a main path; and a plurality of branched paths branched at branched points from the main path, an end of the main path-side on the core is optically coupled to the light emitting device, the branched points are sequentially provided in a guiding light direction, the width of the main path becomes narrower as the main path moves away from the light emitting device, and an angle θ formed by one side extending in the light guiding direction and the other side opposed to the one side is 0.1° to 5°, and the light emitting device is a light-emitting diode or a semiconductor laser.