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US 11,892,716 B2Granted
Optical device and optical transceiver using the same
AssigneeFujitsu Optical Components Limited
InventorMasaki Sugiyama
Life of this patent
Estimating the term…
Abstract
An optical device includes a substrate, a layered structure provided on the substrate and including an intermediate layer, an optical waveguide formed of a thin crystal film having an electro-optic effect, and a buffer layer stacked in this order, and an electrode provided on or above the buffer layer and configured to apply a direct current voltage to the optical waveguide. The resistivity of the intermediate layer is higher than the resistivity of the buffer layer.
Claims15
An optical device comprising:
- a substrate;
- a layered structure provided on the substrate, the layered structure including an intermediate layer, an optical waveguide formed of a thin crystal film having an electro-optic effect, and a buffer layer stacked in this order;
- and
- an electrode provided on or above the buffer layer and configured to apply a direct current voltage to the optical waveguide,
- wherein a resistivity of the intermediate layer is higher than a resistivity of the buffer layer, and the resistivity of the buffer layer is lower than a resistivity of the optical waveguide formed of the thin crystal film.
2 more elements
An optical device comprising:
- a substrate;
- a layered structure provided on the substrate, the layered structure including an intermediate layer, an optical waveguide formed of a thin crystal film having an electro-optic effect, and a buffer layer stacked in this order;
- and
- an electrode provided on or above the buffer layer and configured to apply a direct current voltage to the optical waveguide,
- wherein a resistivity of the intermediate layer is higher than a resistivity of the buffer layer, and the resistivity of the intermediate layer is higher than a resistivity of the optical waveguide formed of the thin crystal film.
2 more elements
An optical device comprising:
- a substrate;
- a layered structure provided on the substrate, the layered structure including an intermediate layer, an optical waveguide formed of a thin crystal film having an electro-optic effect, and a buffer layer stacked in this order;
- and
- an electrode provided on or above the buffer layer and configured to apply a direct current voltage to the optical waveguide,
- wherein a resistivity of the intermediate layer is higher than a resistivity of the buffer layer, and a resistivity of the substrate is higher than the resistivity of the buffer layer.
2 more elements
An optical transceiver comprising:
- an optical transmitter circuit;
- and
- an optical receiver circuit,
- wherein the optical transmitter circuit has an optical device comprising a substrate, a layered structure provided on the substrate and including an intermediate layer, an optical waveguide formed of a thin crystal film having an electro-optic effect, and a buffer layer stacked in this order, and an electrode provided on or above the buffer layer and configured to apply a direct current voltage to the optical waveguide, and
- wherein a resistivity of the intermediate layer is higher than a resistivity of the buffer layer, and the resistivity of the buffer layer is lower than a resistivity of the optical waveguide formed of the thin crystal film.
2 more elements
An optical transceiver comprising:
- an optical transmitter circuit;
- and
- an optical receiver circuit,
- wherein the optical transmitter circuit has an optical device comprising a substrate, a layered structure provided on the substrate and including an intermediate layer, an optical waveguide formed of a thin crystal film having an electro-optic effect, and a buffer layer stacked in this order, and an electrode provided on or above the buffer layer and configured to apply a direct current voltage to the optical waveguide, and
- wherein a resistivity of the intermediate layer is higher than a resistivity of the buffer layer, and the resistivity of the intermediate layer is higher than a resistivity of the optical waveguide formed of the thin crystal film.
2 more elements
An optical transceiver comprising:
- an optical transmitter circuit;
- and
- an optical receiver circuit,
- wherein the optical transmitter circuit has an optical device comprising a substrate, a layered structure provided on the substrate and including an intermediate layer, an optical waveguide formed of a thin crystal film having an electro-optic effect, and a buffer layer stacked in this order, and an electrode provided on or above the buffer layer and configured to apply a direct current voltage to the optical waveguide, and
- wherein a resistivity of the intermediate layer is higher than a resistivity of the buffer layer, and a resistivity of the substrate is higher than the resistivity of the buffer layer.
2 more elements
Dependencies are inferred from the claim text.