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US 2023/0266531 A1Published application
Bilayer silicon nitride polarization splitter and rotator
AssigneeCisco Technology, Inc.
InventorJean-Luc Joseph Tambasco
Life of this patent
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Abstract
A photonic polarization splitter rotator (PSR) includes a substrate, a first optical waveguide disposed on the substrate at a first layer, the first optical waveguide having a substantially rectangular shape and longitudinally arranged between a first end of the first optical waveguide and a second end of the first optical waveguide, and a second optical waveguide arranged to have a partial and fixed amount of overlap over a predetermined length of the first optical waveguide.
Claims20
A device comprising:
- a substrate;
- a first optical waveguide disposed on the substrate at a first layer, the first optical waveguide having a substantially rectangular shape and longitudinally arranged between a first end of the first optical waveguide and a second end of the first optical waveguide;
- and
- a second optical waveguide arranged to have a partial and fixed amount of overlap over a predetermined length of the first optical waveguide.
1 more element
A device comprising:
- a first optical waveguide;
- and
- a second optical waveguide,
- wherein the device includes a first region;
- a second region, and a third region, the second region disposed between the first region and the second region,
- wherein in the first region, the second optical waveguide comprises a bent end that is translated away from the first optical waveguide,
- wherein in the second region, the second optical waveguide has a first edge that shifts away from a second edge of the second optical waveguide, and the second optical waveguide at least partially overlaps with the first optical waveguide, and
- wherein in the third region, the second optical waveguide translates fully away from any overlap with the first optical waveguide.
5 more elements
A method comprising:
- inputting light, from an optical fiber, at a first end of a first optical waveguide;
- causing the light to interact with a second optical waveguide partially overlapping with the first optical waveguide, the second optical waveguide including a first end of the second optical waveguide and a second end of the second optical waveguide, wherein the second optical waveguide includes a bent end narrowing to a tip at the first end of the second optical waveguide, and only one edge of a portion of the second optical waveguide shifts away at a diagonal from a side of the first optical waveguide over a predetermined length of the first optical waveguide;
- outputting a first optical signal at a second end of the first optical waveguide;
- and
- outputting a second optical signal at the second end of the second optical waveguide.
2 more elements
Dependencies are inferred from the claim text.