Optical module and method for manufacturing the same

Abstract

An optical waveguide includes three cores formed within a single cladding, and each of the cores embed therein a light source and a light-receiving section, whose respective optical axes are aligned to each other. The light-receiving section includes a tapered reflective side surface, a light blocking section, and a light-receiving body. The tapered reflective side surface guides, among lights that propagate through the cores, only a light having an incidence angle within a range whose upper limit of is an angle θ0C decided based on NA of the optical waveguide, to an effective light-receiving portion. The tapered reflective side surface has a spread angle facing toward a direction of the light source, and is installed in a periphery of the effective light-receiving portion. An aperture diameter of the tapered reflective side surface is designed to be equal to or less than a width (or diameter) of the cores.

Dependencies are inferred from the claim text.