Patent ID: 9557624
Date: 2017-01-31
CPC Classifications: G02F,H04B

Claim:
1. An optical modulator comprising: a substrate that has an optical waveguide that includes a split section that splits light into two light waves, a pair of arms through which the light waves propagate, and a combining section that combines the light waves from the pair of arms with each other; and an electrode that generates an electric field by a voltage applied to the electrode, wherein the optical waveguide has a first waveguide portion and a second waveguide portion, the electrode overlaps the first waveguide portion of the optical waveguide; and the second waveguide portion of the optical waveguide has a narrow portion that is narrower than the first waveguide portion of the optical waveguide and emits light in higher-order modes to outside of the optical waveguide.