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US 12,498,596 B2Granted
Optical modulator
AssigneeTDK Corporation
InventorsKenji Nagase, Hiroshi Take, Anthony Reymund Melad Binarao, Cheng Bu Heng
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Abstract
An optical modulator, including: a substrate; a plurality of electro-optic material layers formed on the substrate; and an electrode formed on the electro-optic material layer; wherein the electro-optic material layer has a patterned RF portion waveguide that applies a modulated signal and a patterned DC portion waveguide that applies a direct current bias signal; and on a section perpendicular to a light propagation direction, the sectional area of the DC portion waveguide is greater than the sectional area of the RF portion waveguide.
Claims5
An optical modulator, comprising:
- a substrate;
- a plurality of electro-optic material layers formed on the substrate;
- and
- an electrode formed on the electro-optic material layer;
- wherein
- the electro-optic material layer has a patterned RF portion waveguide that applies a modulated signal and a patterned DC portion waveguide that applies a direct current bias signal;
- and
- on a section perpendicular to a light propagation direction, a sectional area of the DC portion waveguide is greater than a sectional area of the RF portion waveguide,
- wherein
- the DC portion waveguide comprises:
- a first layered portion formed on the substrate, a first intermediate protrusion portion formed by protruding from the first layered portion, and a first uppermost protrusion portion formed by protruding from the first intermediate protrusion portion;
- the RF portion waveguide comprises:
- a second layered portion formed on the substrate, a second intermediate protrusion portion formed by protruding from the second layered portion, and a second uppermost protrusion portion formed by protruding from the second intermediate protrusion portion;
- and
- the height of the uppermost end of the first intermediate protrusion portion is higher than the height of the uppermost end of the second intermediate protrusion portion.
12 more elements
Dependencies are inferred from the claim text.