OPTICAL WAVEGUIDE DEVICE, METHOD FOR MANUFACTURING THE SAME, LIGHT SOURCE USING THE SAME AND OPTICAL SYSTEM USING THE SAME

摘要

PROBLEM TO BE SOLVED: To improve coupling efficiency and to lower return light noise in direct coupling of a semiconductor laser and an optical waveguide device. SOLUTION: The end face of a substrate formed with the optical waveguide and the end face of the optical waveguide are formed at different angles.