OPTICAL COUPLER
First Claim
1. An optical coupler configured to connect an optical device and an optical fiber, the optical coupler comprising:
- a substrate;
a buffer layer on the substrate;
a ridge waveguide on the buffer layer, the ridge waveguide having a first side surface connected with the optical fiber and a second side surface opposed to the first side surface, the first side surface having a greater width than the second side surface; and
a first waveguide on the buffer layer, the first waveguide disposed adjacent to the second side surface,wherein the first waveguide includes a first body part and a first connecting part extending from one end of the first body part to thereby be inserted in the ridge waveguide,wherein the first connecting part has a width decreasing in a direction away from the second side surface, andwherein the ridge waveguide includes an extension part extending under an upper surface of the buffer layer.
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Accused Products
Abstract
Provided is an optical coupler including a substrate, a buffer layer on the substrate, a ridge waveguide having a first side surface and a second side surface opposed to the first side surface, and a first waveguide disposed adjacent to the second side surface. The first waveguide includes a first body part and a first connecting part extending from one end of the first body part to be inserted in the ridge waveguide. The first connecting part has a width decreasing in the direction away from the second side surface, and the ridge waveguide includes an extension part extending under an upper surface of the buffer layer.
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Citations
20 Claims
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1. An optical coupler configured to connect an optical device and an optical fiber, the optical coupler comprising:
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a substrate; a buffer layer on the substrate; a ridge waveguide on the buffer layer, the ridge waveguide having a first side surface connected with the optical fiber and a second side surface opposed to the first side surface, the first side surface having a greater width than the second side surface; and a first waveguide on the buffer layer, the first waveguide disposed adjacent to the second side surface, wherein the first waveguide includes a first body part and a first connecting part extending from one end of the first body part to thereby be inserted in the ridge waveguide, wherein the first connecting part has a width decreasing in a direction away from the second side surface, and wherein the ridge waveguide includes an extension part extending under an upper surface of the buffer layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An optical coupler configured to connect an optical device and an optical fiber, the optical coupler comprising:
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a substrate; a buffer layer on the substrate; a ridge waveguide on the buffer layer, the ridge waveguide having a first side surface connected with the optical fiber and a second side surface opposed to the first side surface; a first waveguide on the buffer layer, the first waveguide disposed adjacent to the second side surface; and a second waveguide on the buffer layer and optically coupled to the first waveguide, wherein the first waveguide includes a first body part, a first connecting part, and a second connection part, the first connecting part extending from one end of the first body part to thereby be inserted in the ridge waveguide, the second connecting part extending from the other end of the first body part, wherein the first connecting part has a width decreasing in a direction away from the second side surface, wherein the ridge waveguide includes an extension part extending under an upper surface of the buffer layer, wherein the second waveguide includes; a second body part, and a third connecting part extending from one end of the second body part and having a width decreasing in a direction away from the second body part, and wherein the third connecting part is connected to the second connecting part. - View Dependent Claims (17, 18, 19, 20)
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Specification