Optical waveguide device, coherent light source, integrated unit, and optical pickup

摘要

An optical waveguide device comprises a substrate having first and second surfaces, and an optical waveguide provided on the first surface of the substrate, having a light-incoming facet and a facet inclined with respect to the optical waveguide. Guided light incident to the optical waveguide through the light-incoming facet is totally reflected off the inclined facet, and the guided light is transmitted through the first or second surface of the substrate.