OPTICAL MODULATOR

摘要

An optical modulator includes a substrate, an electrode, and an optical waveguide. The substrate includes a flat portion and a protruding portion protruded from the flat portion. The electrode is supported by the protruding portion. The optical waveguide is formed inside the protruding portion and waveguides light to be modulated with a voltage applied to the electrode. The protruding portion contains a part, present on the side of the electrode, of a light distribution region over which the light waveguided by the optical waveguide is distributed. A height of a tip of the protruding portion from the flat portion is smaller than a width of the light distribution region along a protruding direction of the protruding portion. A width of the tip of the protruding portion is smaller than a width of the light distribution region along a direction perpendicular to the protruding direction of the protruding portion.

主权项

1. An optical modulator comprising:
a substrate that has a flat portion and a protruding portion protruded from the flat portion; an electrode supported by the protruding portion; and an optical waveguide that is formed inside the protruding portion and waveguides light to be modulated with a voltage applied to the electrode, wherein the protruding portion contains a part, present on a side of the electrode, of a light distribution region over which the light waveguided by the optical waveguide is distributed, the protruding portion has a tip with a height thereof from the flat portion being smaller than a width of the light distribution region along a protruding direction of the protruding portion, and the tip of the protruding portion has a width smaller than a width of the light distribution region along a direction perpendicular to the protruding direction of the protruding portion.