Optical Coupler
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Abstract
A semiconductor photonic device includes a substrate, facet(s), and optical coupler(s) associated with the facet(s). Each optical coupler can couple an electromagnetic field incident on the respective facet towards the substrate as the electromagnetic field proceeds into the semiconductor photonic device. In some examples, each coupler has waveguides extending in a longitudinal direction and at least partly encapsulated within corresponding cladding layers. A first waveguide extends farther from the facet in the longitudinal direction than does a second waveguide. The second waveguide is located farther above the silicon substrate than is the first waveguide. The coupler can include a stack of waveguide assemblies. A lower waveguide assembly can include one waveguide. An intermediate or upper waveguide assembly can include multiple waveguides. In some examples, at least one waveguide tapers along its length.
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Citations
40 Claims
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1-20. -20. (canceled)
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21. A device, comprising:
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a semiconductor substrate; a first cladding layer arranged over the semiconductor substrate and having a relatively lower refractive index; and a plurality of waveguide assemblies arranged in a stack over the first cladding layer, the plurality of waveguide assemblies comprising; a lower waveguide assembly arranged over the first cladding layer and comprising; a lower cladding layer having a relatively lower refractive index; and a tapered lower waveguide at least partly encapsulated in the lower cladding layer and having a relatively higher refractive index; at least one intermediate waveguide assembly arranged over a preceding waveguide assembly of the plurality of waveguide assemblies, each intermediate waveguide assembly comprising; a respective cladding layer having a relatively lower refractive index; and at least one intermediate waveguide at least partly encapsulated in the respective cladding layer and having a relatively higher refractive index; and an upper waveguide assembly arranged over an uppermost of the at least one intermediate waveguide assembly, the upper waveguide assembly comprising; an upper cladding layer having a relatively lower refractive index; and at least two upper waveguides spaced apart laterally, each of the at least two upper waveguides at least partly encapsulated in the upper cladding layer and having a relatively higher refractive index, wherein a first waveguide of the at least one intermediate waveguide or of the at least two upper waveguides tapers along a length of the selected waveguide. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A device comprising:
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a substrate; and an optical coupler comprising a plurality of waveguide assemblies arranged over the substrate, the plurality of waveguide assemblies comprising; a first waveguide assembly comprising a first cladding layer and one or more first waveguides that are at least partly encapsulated within the first cladding layer; and a second waveguide assembly arranged over the first waveguide assembly, the second waveguide assembly comprising a second cladding layer and one or more second waveguides that are at least partly encapsulated within the second cladding layer - View Dependent Claims (31, 32, 33, 34, 35, 36)
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37. An assembly comprising:
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a semiconductor photonic device having; a substrate; a plurality of facets; and a plurality of optical couplers associated with respective facets of the plurality of facets; and a plurality of single-mode optical fibers disposed in a splice configuration with respect to respective facets of the plurality of facets, wherein; each optical coupler of the plurality of optical couplers comprises; a plurality of waveguide assemblies arranged over the substrate, the plurality of waveguide assemblies comprising; a first waveguide assembly comprising a first waveguide at least partly encapsulated within a first cladding layer; and a second waveguide assembly arranged over the first waveguide assembly, the second waveguide assembly comprising a second waveguide at least partly encapsulated within a second cladding layer, each optical coupler of the plurality of optical couplers comprises means for coupling an electromagnetic field incident on the facet towards the substrate as the electromagnetic field proceeds into the semiconductor photonic device, and a selected waveguide among the respective first waveguides and the respective second waveguides tapers along a length of the selected waveguide. - View Dependent Claims (38, 39, 40)
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Specification