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US 9,620,931 B2Granted
Optical device, optical transmission device, optical reception device, hybrid laser and optical transmission apparatus
AssigneeFujitsu Limited
InventorShinsuke Tanaka
Life of this patent
Estimating the term…
Abstract
An optical device includes a silicon waveguide core having a tapered portion having a sectional size that decreases toward a terminal end portion thereof, a dielectric waveguide core contiguous to the silicon waveguide core while covering at least the tapered portion, the dielectric waveguide core having a refractive index lower than that of the silicon waveguide core and configuring a single-mode waveguide, and a diffraction grating provided at the single-mode waveguide and configuring a distributed Bragg reflection mirror.
Claims17
An optical device, comprising:
- a silicon waveguide core having a tapered portion having a sectional size that decreases toward a terminal end portion thereof;
- a dielectric waveguide core contiguous to the silicon waveguide core while covering at least the tapered portion, the dielectric waveguide core having a refractive index lower than that of the silicon waveguide core and configuring a single-mode waveguide;
- and
- a diffraction grating provided at a region, in which the silicon waveguide core does not exist, of a dielectric waveguide including the dielectric waveguide core and configuring a distributed Bragg reflection mirror, the diffraction grating not being in contact with the silicon waveguide core;
- wherein
- the diffraction grating is configured from a silicon film having a refractive index greater than that of the dielectric waveguide core and is provided on the same plane as that of the silicon waveguide core.
3 more elements
An optical device, comprising:
- a silicon waveguide core having a tapered portion having a sectional size that decreases toward a terminal end portion thereof;
- a dielectric waveguide core contiguous to the silicon waveguide core while covering at least the tapered portion, the dielectric waveguide core having a refractive index lower than that of the silicon waveguide core and configuring a single-mode waveguide;
- and
- a diffraction grating provided at a region, in which the silicon waveguide core does not exist, of a dielectric waveguide including the dielectric waveguide core and configuring a distributed Bragg reflection mirror, the diffraction grating not being in contact with the silicon waveguide core;
- wherein the diffraction grating is configured by periodically varying the sectional size of the dielectric waveguide core.
2 more elements
Dependencies are inferred from the claim text.