Patent ID: 7283710

Claim:
An optical waveguide device comprising: a substrate having an optical fiber mounting region and an optical waveguide mounting region, wherein the optical fiber mounting region has formed therein an optical fiber guide to mount an optical fiber; an optical waveguide provided in the optical waveguide mounting region and comprising a core for propagating light and a clad layer surrounding the core; and an optical waveguide held by the optical fiber guide, wherein the optical waveguide has a slanted face slanting from a face perpendicular to a length direction of the optical fiber guide so as to extend above the optical fiber guide, in at least one part of an end face of the optical waveguide, and at least one part of an end face of the optical fiber held by the optical fiber guide is in contact with the slanted face provided on the end face of the optical waveguide; wherein the end face of the optical fiber is slanted in the same direction as that of the end face of the optical waveguide with respect to the face perpendicular to the length direction of the optical fiber guide, and inclination of the end face of the optical fiber from the perpendicular face is smaller than that of the end face of the optical waveguide from the perpendicular face so that a space is formed between the end face of the optical fiber and the end face of the optical waveguide.