Optical waveguide, optical interposer and light source
First Claim
Patent Images
1. An optical waveguide, comprising:
- a substrate;
a first core provided over the substrate and having a first taper region that extends from a first side toward a second side being the opposite side to the first side and has a sectional area that decreases toward the second side; and
a plurality of second cores provided over the substrate and over or under the first core with a first cladding layer sandwiched therebetween and extending in parallel to the substrate and the first core,wherein the first core is positioned on an inner side with respect to two second cores positioned on the most outer sides as viewed from above from among the plurality of the second cores, andwherein the first taper region and each second core of the plurality of the second cores have a portion overlapping with each other in an extending direction of the first core and the second core.
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Abstract
An optical waveguide includes a substrate, a first core provided over the substrate and having a first taper region that extends from one side toward the other side and has a sectional area that decreases toward the other side, and a plurality of second cores provided over the substrate and over or under the first core with a first cladding layer sandwiched therebetween and extending in parallel to the substrate and the first core.
14 Citations
20 Claims
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1. An optical waveguide, comprising:
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a substrate; a first core provided over the substrate and having a first taper region that extends from a first side toward a second side being the opposite side to the first side and has a sectional area that decreases toward the second side; and a plurality of second cores provided over the substrate and over or under the first core with a first cladding layer sandwiched therebetween and extending in parallel to the substrate and the first core, wherein the first core is positioned on an inner side with respect to two second cores positioned on the most outer sides as viewed from above from among the plurality of the second cores, and wherein the first taper region and each second core of the plurality of the second cores have a portion overlapping with each other in an extending direction of the first core and the second core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An optical interposer, comprising:
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a substrate; an optical waveguide provided on the substrate; an optical modulator provided on the substrate; and an optical detector provided on the substrate;
wherein the optical waveguide includes;a first core provided over the substrate and having a first taper region extending from a first side toward a second side being the opposite side to the first side and having a sectional area that decreases toward the second side; and a plurality of second cores provided over the substrate and over or under the first core with a first cladding layer sandwiched therebetween and extending in parallel to the substrate and the first core, wherein the first taper region and each second core of the plurality of the second cores have a portion overlapping with each other in an extending direction of the first core and the second core. - View Dependent Claims (19)
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20. A light source, comprising:
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a substrate; an optical waveguide provided on the substrate; and a light emitter provided on the substrate;
wherein the optical waveguide includes;a first core provided over the substrate and having a first taper region extending from a first side toward a second side being the opposite side to the first side and having a sectional area that decreases toward the second side; and a plurality of second cores provided over the substrate and over or under the first core with a first cladding layer sandwiched therebetween and extending in parallel to the substrate and the first core, wherein the first taper region and each second core of the plurality of the second cores have a portion overlapping with each other in an extending direction of the first core and the second core.
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Specification