Waveguide bends with field confinement
First Claim
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1. A structure comprising:
- a waveguide;
a first waveguide bend that is contiguous with the waveguide, the first waveguide bend having an inner surface curved in a first arc with a first arc length; and
a second waveguide bend spaced in a vertical direction from the first waveguide bend, the second waveguide bend having a first overlapping arrangement with the first waveguide bend in a lateral direction, the second waveguide bend having an inner surface curved in a second arc with a second arc length,wherein the inner surface of the second waveguide bend over the second arc with the second arc length is concentric with the inner surface of the first waveguide bend over the first arc with the first arc length.
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Abstract
Structures including waveguide bends, methods of fabricating a structure that includes waveguide bends, and systems that integrate optical components containing different materials. A first waveguide bend is contiguous with a waveguide, and a second waveguide bend is spaced in a vertical direction from the first waveguide bend. The second waveguide bend has an overlapping arrangement with the first waveguide bend in a lateral direction.
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Citations
20 Claims
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1. A structure comprising:
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a waveguide; a first waveguide bend that is contiguous with the waveguide, the first waveguide bend having an inner surface curved in a first arc with a first arc length; and a second waveguide bend spaced in a vertical direction from the first waveguide bend, the second waveguide bend having a first overlapping arrangement with the first waveguide bend in a lateral direction, the second waveguide bend having an inner surface curved in a second arc with a second arc length, wherein the inner surface of the second waveguide bend over the second arc with the second arc length is concentric with the inner surface of the first waveguide bend over the first arc with the first arc length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 19, 20)
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12. A system comprising:
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a waveguide bend comprised of fully-etched single-crystal semiconductor material; a first plurality of optical components; a second plurality of optical components; a first waveguide arranged to couple the first plurality of optical components with the waveguide bend; a second waveguide arranged to couple the second plurality of optical components with the waveguide bend; and a first waveguide-to-waveguide coupler coupling the first waveguide to the waveguide bend. - View Dependent Claims (13, 14, 15)
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16. A method comprising:
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forming a waveguide and a first waveguide bend that is contiguous with the waveguide; and forming a second waveguide bend that is spaced in a vertical direction from the first waveguide bend and that overlaps with the first waveguide bend in a lateral direction, wherein the first waveguide bend has an inner surface curved in a first arc with a first arc length, the second waveguide bend has an inner surface curved in a second arc with a second arc length, and the inner surface of the second waveguide bend over the second arc with the second arc length is concentric with the inner surface of the first waveguide bend over the first arc with the first arc length. - View Dependent Claims (17, 18)
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Specification