Integrated waveguide coupler
First Claim
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1. A method for fabricating an integrated waveguide coupler, the method comprising:
- at least partially filling a gap with a first material having a first index of refraction, wherein;
the gap is from 5 to 100 microns wide;
the gap is between a semiconductor waveguide and an opto-electronic device;
the semiconductor waveguide is configured to guide light in a direction of beam propagation;
the opto-electronic device comprises a facet;
the facet has an orientation identified by a direction normal to the facet;
the direction normal to the facet is not parallel with the direction of beam propagation; and
the opto-electronic device is configured to guide light to pass through the facet; and
at least partially filling the gap with a second material having a second index of refraction that is greater than the first index of refraction, wherein the direction of beam propagation is ascertained at an interface between the semiconductor waveguide and the second material.
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Abstract
A waveguide coupler includes a first waveguide and a second waveguide. The waveguide coupler also includes a connecting waveguide disposed between the first waveguide and the second waveguide. The connecting waveguide includes a first material having a first index of refraction and a second material having a second index of refraction higher than the first index of refraction.
27 Citations
11 Claims
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1. A method for fabricating an integrated waveguide coupler, the method comprising:
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at least partially filling a gap with a first material having a first index of refraction, wherein; the gap is from 5 to 100 microns wide; the gap is between a semiconductor waveguide and an opto-electronic device; the semiconductor waveguide is configured to guide light in a direction of beam propagation; the opto-electronic device comprises a facet; the facet has an orientation identified by a direction normal to the facet; the direction normal to the facet is not parallel with the direction of beam propagation; and the opto-electronic device is configured to guide light to pass through the facet; and at least partially filling the gap with a second material having a second index of refraction that is greater than the first index of refraction, wherein the direction of beam propagation is ascertained at an interface between the semiconductor waveguide and the second material. - View Dependent Claims (2, 3, 4, 5)
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6. An integrated waveguide coupler comprising:
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a silicon substrate; a semiconductor waveguide, wherein; the semiconductor waveguide is disposed on the silicon substrate; the semiconductor waveguide is configured to guide light in a direction of beam propagation; and the semiconductor waveguide comprises crystalline silicon; a chip, wherein; the chip is disposed on the silicon substrate; the chip comprises III-V material; the chip comprises a facet; the chip is configured to guide light to pass through the facet; the facet has an orientation identified by a direction normal to the facet; and the direction normal to the facet is not parallel with the direction of beam propagation of the semiconductor waveguide; and a connecting waveguide between the semiconductor waveguide and the facet of the chip, wherein; the connecting waveguide comprises amorphous silicon; the direction of beam propagation is ascertained at an interface between the semiconductor waveguide and the connecting waveguide; and the connecting waveguide is configured to guide light in the amorphous silicon from the semiconductor waveguide to the chip. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification