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US 2002/0159739 A1Published application
Optical waveguide crossing and method of making same
AssigneeSarnoff Corporation
InventorsLiyou Yang, Nagandranath Maley
Life of this patent
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Abstract
A photonic device including: at least first and second optical waveguides; and, a buffer at least partially interposed between the first and second optical waveguides where they at least partially overlie one-another so as to at least partially mitigate interference between optical signals traversing the first and second optical waveguides.
Claims34
A photonic device comprising:
- at least first and second optical waveguides;
- and,
- a buffer at least partially interposed between said first and second optical waveguides where they at least partially overlie one-another so as to at least partially mitigate interference between optical signals traversing said first and second optical waveguides.
A method for making a photonic integrated circuit, said method comprising:
- forming a first optical waveguide;
- forming a buffer over at least a portion of said first optical waveguide;
- and,
- forming a second optical waveguide over at least a portion of said buffer;
- wherein, said buffer is adapted to at least partially mitigate interference between optical signals traversing said first and second optical waveguides.
2 more elements
An optical communications device comprising:
- a plurality of optical waveguides crossing one another;
- and,
- a buffer positioned above at least one of said waveguides to elevate at least one other of said waveguides over said at least one of said waveguides where they cross;
- wherein, said buffer at least partially mitigates losses in signals traversing said at least one and one other of said plurality of waveguides due to said crossing and elevates said at least one other of said waveguides sufficiently gradual to at least partially mitigate loss of optical signals traversing said at least one other of said optical waveguides due to said elevation.
1 more element
Dependencies are inferred from the claim text.