Patent ID: 11892743
Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical modulation element comprising:
two Mach-Zehnder type optical waveguides that are provided on a substrate;
a branched waveguide that branches input light which is input from an outside of the substrate into two light beams;
two connection waveguides that respectively guide the light beams branched by the branched waveguide to the two Mach-Zehnder type optical waveguides; and
electrodes that respectively control optical waves propagating in optical waveguides configuring the two Mach-Zehnder type optical waveguides, wherein
respective parallel waveguides of the two Mach-Zehnder type optical waveguides are configured to extend linearly along one side of the substrate,
the branched waveguide is a Y-branch optical waveguide disposed such that light is input from a direction of the one side of the substrate,
the branched waveguide is formed to be line-symmetrical with respect to a propagation direction of the light input to the branched waveguide and to output the two branched light beams in a direction different from the propagation direction,
the two connection waveguides each includes a linear waveguide and a curved waveguide, and
the linear waveguides each included in the connection waveguides extend in a direction different from the direction of extension of the parallel waveguides.