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US 6,807,354 B2Granted
Waveguide optical device
AssigneeFujitsu Limited
InventorsGoji Nakagawa, Haruhiko Tabuchi
Life of this patent
Estimating the term…
Abstract
A channel core pattern includes a plurality of core pattern elements having different lengths, another core pattern connected with the channel core pattern in series, and a refractive index of the channel core pattern is higher than a refractive index of the another core pattern.
Claims20
A waveguide optical device, comprising:
- a channel core pattern comprising a plurality of core pattern elements having different lengths;
- another core pattern connected with said channel core pattern in series,
- wherein a refractive index of said channel core pattern is higher than a refractive index of said another core portion;
- and
- an enclosing part to enclose said channel core pattern and having a refractive index approximately equal to the refractive index of said another core pattern.
2 more elements
A waveguide optical device, comprising:
- a channel core pattern comprising a plurality of core pattern elements having different lengths;
- and
- another core pattern connected with said channel core pattern in series,
- wherein a specific refractive index of said channel core pattern with respect to a clad thereof is higher than a specific refractive index of said another core pattern with respect to a clad thereof;
- and
- an enclosing part to enclose said channel core pattern and having a refractive index approximately equal to the refractive index of said another core pattern.
3 more elements
A waveguide optical device for combining a plurality of optical signals having different wavelengths or demultiplexing a multiplexed optical signal, comprising:
- a base part having a predetermined refractive index;
- an input waveguide having a refractive index higher than that of said base part, and comprising a core connected with a core of an optical fiber;
- an input slab waveguide comprising a core connected with said input waveguide having a refractive index approximately equal to that of said input waveguide, wherein the core width is wider than that of said input waveguide;
- a channel waveguide having a refractive index higher than that of said input slab waveguide, comprising a plurality of cores having different lengths and connected with said input slab waveguide, and enclosed by an enclosing part having a refractive index approximately equal to that of said input waveguide;
- an output slab waveguide having a core connected with the respective cores of said channel waveguide, and having a refractive index approximately equal to that of said enclosing part of said channel waveguide;
- and
- an output waveguide having a plurality of cores having a refractive index approximately equal to that of said output slab waveguide and connected with the core of said output slab waveguide, wherein each core of said plurality of cores has a width narrower than that of said output slab waveguide.
4 more elements
A waveguide optical device, comprising:
- a first core pattern comprising a plurality of elements;
- a second core pattern connected with said first core pattern and having a refractive index;
- and
- an encloser to enclose said first core pattern and having a refractive index approximately equal to the refractive index of said second core pattern.
1 more element
A waveguide optical device to combine a plurality of optical signals having different wavelengths or demultiplexing a multiplexed optical signal, comprising:
- a base having a refractive index;
- an input waveguide supported by the base and having a refractive index higher than the refractive index of the base;
- an input slab waveguide connected with the input waveguide;
- a channel waveguide connected to the input slab waveguide and having a refractive index higher than the refractive index of the input waveguide;
- an encloser to enclose the channel waveguide, having a refractive index approximately equal to the refractive index of the input waveguide;
- an output slab waveguide connected the channel waveguide, and having a refractive index approximately equal to the refractive index of the encloser;
- and
- an output waveguide connected to the output slab waveguide and having a refractive index approximately equal to the refractive index of the output slab waveguide.
5 more elements
Dependencies are inferred from the claim text.