| 摘要 |
To provide an optical integrated module that can eliminate an influence that unguided optical signal given rise to due to discontinuities between optical waveguides which is essentially inevitable in hybrid photonic integration exerts optical switching performance, adjacent angled optical waveguide portions on both incident and emission facets of an optical waveguide of an optical waveguide device are formed so as to get bent toward the same side with respect to a straight line in the longitudinal direction of an optical waveguide platform, and an input optical waveguide and an output optical waveguide of the optical waveguide platform are also formed so as to get bent toward the same direction corresponding with the bending of the optical waveguide of the optical waveguide device. Unguided optical signal which is given rise to at the time of wave-guiding from the input optical waveguide to the optical waveguide device is launched into the output optical waveguide at a deep angle exceeding an effective aperture for the output optical waveguide so that a crosstalk component for the output optical waveguide is controlled. Consequently, it becomes possible that only optical coupling efficiency for unguided optical signal is selectively and extremely effectively controlled while deterioration in coupling efficiency for the optical signal is suppressed to be as small as possible.
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