Light-Receiving Structure for Waveguide Type Optical Devices

A light receiving structure for waveguide type optical devices, which excels in productivity, is compactly formed and permits highly efficient coupling, is provided. A recess is provided in part of the surface of a substrate on which an optical waveguide is formed, and a light-receiving element is mounted on the recess, with its light-receiving face upward. Near the recess is formed an end face of the optical waveguide in advance, so that a light be emitted therefrom. On the other hand, over the substrate is arranged a cover in which a groove is formed in a position opposite to the optical waveguide and a reflector is formed in a position opposite to the light receiving element. The light emitted from the optical waveguide is reflected by the reflector and coupled to the light receiving element. A through hole can be bored in the substrate in advance, so that the packaging density can be improved by mounting the light-receiving element with its light-receiving face toward the through hole and thereby mounting the light-receiving element on the under side. <IMAGE>