Optical waveguide device and method for manufacturing the same

Abstract

The optical waveguide component of the present disclosure provides a configuration for optically connecting two optical waveguides composed of different materials with low loss. The first optical circuit including the core of a first material and a second optical circuit including a core of a second material are configured on a single substrate. The optical waveguide component of the present disclosure includes an optical connection part between two optical circuits, and has a double structure in which a core cross-sectional region of one optical waveguide is included in a core cross-sectional region of the other optical waveguide between the two optical waveguides. The optical connection part is provided with a protrusion part of the underclad extending along the first core from the high-level surface toward the low-level surface of the underclad toward, and the width of the protrusion part is gradually narrowed toward the second optical circuit.