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US 2022/0066093 A1Published application
Optical waveguide and optical device
AssigneeFujitsu Limited
InventorTokuharu Kimura
Life of this patent
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Abstract
An optical waveguide includes a core, a first cladding, a second cladding, and a heater. The first cladding configured to cover the core. The second cladding disposed over the first cladding. The heater disposed over the second cladding to heat the core. The first cladding and the second cladding are silicon oxide films. A first fixed charge density of the first cladding is lower than a second fixed charge density of the second cladding.
Claims9
An optical waveguide comprising:
- a core;
- a first cladding configured to cover the core;
- a second cladding disposed over the first cladding;
- and
- a heater disposed over the second cladding to heat the core,
- wherein the first cladding and the second cladding are silicon oxide films, and a first fixed charge density of the first cladding is lower than a second fixed charge density of the second cladding.
3 more elements
An optical device comprising:
- a wavelength tunable laser configured to output a laser light;
- and
- a modulator configured to modulate the laser light, wherein
- the wavelength tunable laser includes an optical waveguide, the optical waveguide includes:
- a first cladding configured to cover the core,
- a second cladding disposed over the first cladding, and
- a heater disposed over the second cladding to heat the core,
- wherein the first cladding and the second cladding are silicon oxide films, and a first fixed charge density of the first cladding is lower than a second fixed charge density of the second cladding.
5 more elements
An optical device comprising:
- a wavelength tunable laser configured to output a laser light;
- and
- a receiver configured to receive an optical signal and generate an interference by mixing the optical signal and laser light, wherein
- the wavelength tunable laser includes an optical waveguide, the optical waveguide includes:
- a first cladding configured to cover the core,
- a second cladding disposed over the first cladding, and
- a heater disposed over the second cladding to heat the core,
- wherein the first cladding and the second cladding are silicon oxide films, and a first fixed charge density of the first cladding is lower than a second fixed charge density of the second cladding.
5 more elements
Dependencies are inferred from the claim text.