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Crossovers Without Crosstalk

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Technique allows waveguides to intersect without coupling to each other.

Breck Hitz

In an electronic integrated circuit, tiny conductors connect the various components, and in a nanophotonic integrated circuit, photonic wires — slim submicron waveguides millimeters or centimeters in length — can serve the same function. But whereas electronic integrated circuits are fabricated in multiple layers so conductors can cross each other on different layers without making contact, photonic integrated circuits typically are fabricated on a single layer. Thus, photonic wires cannot duck under each other as they zigzag across the device and instead must intersect directly. The problem...Read full article

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    Published: December 2007
    Basic Scienceelectronic integrated circuitResearch & Technologysubmicron waveguides millimeterstiny conductors

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