OPTICAL COUPLER FOR COUPLING AN OPTICAL FIBER INTO A WAVEGUIDE
First Claim
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1. An optical coupler for coupling light from an optical fiber to a silicon-on-insulator waveguide, comprising:
- first and second top planar portions;
a tapered top portion connecting the first and second top planar portions; and
a base portion connecting to the first and second top planar portions with side portions, the intersection of the base portion and one side portion forming a termination point;
wherein the tapered portion has a slope angle such that the light from the optical fiber reflects from the tapered portion and is incident upon the termination point, and the incident angle of the light at the termination point equals a mode angle of the silicon-on-insulator waveguide.
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Abstract
An optical coupler for parallel coupling from a single mode optical fiber, or fiber ribbon, into a silicon-on-insulator (SOI) waveguide for integration with silicon optoelectronic circuits. The optical coupler incorporates the advantages of the vertically tapered waveguides and prism couplers, yet offers the flexibility of planar integration. The optical coupler may be fabricated using wafer polishing technology or grayscale photolithography. The optical coupler can be packaged using epoxy bonding to form a fiber-waveguide parallel coupler or connector.
21 Citations
10 Claims
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1. An optical coupler for coupling light from an optical fiber to a silicon-on-insulator waveguide, comprising:
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first and second top planar portions;
a tapered top portion connecting the first and second top planar portions; and
a base portion connecting to the first and second top planar portions with side portions, the intersection of the base portion and one side portion forming a termination point;
wherein the tapered portion has a slope angle such that the light from the optical fiber reflects from the tapered portion and is incident upon the termination point, and the incident angle of the light at the termination point equals a mode angle of the silicon-on-insulator waveguide. - View Dependent Claims (2, 3, 4, 5)
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6. An optoelectronic package, comprising:
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an optical fiber;
a silicon-on-insulator waveguide; and
an optical coupler affixed to the optical fiber and the silicon-on-insulator waveguide for coupling light from an optical fiber to a silicon-on-insulator waveguide, the optical coupler comprising;
first and second top planar portions;
a tapered top portion connecting the first and second top planar portions; and
a base portion connecting to the first and second top planar portions with side portions, the intersection of the base portion and one side portion forming a termination point;
wherein the tapered portion has a slope angle such that the light from the optical fiber reflects from the tapered portion and is incident upon the termination point, and the incident angle of the light at the termination point equals a mode angle of the silicon-on-insulator waveguide. - View Dependent Claims (7, 8, 9, 10)
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Specification