Critically coupled microring resonator and method

Optical waveguides – With optical coupler – Particular coupling structure

Reexamination Certificate

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C385S014000, C703S002000

Reexamination Certificate

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07965914

ABSTRACT:
A microring resonator and methods critically couple a microring waveguide to an adjacent bus waveguide. A method of determining parameters of a critically coupled microring resonator includes modeling a coupled portion of the microring resonator as a U-shaped waveguide spaced apart from a straight waveguide by a gap and selecting a straight waveguide width and a gap size to optimize an output coupling ratio between the U-shaped waveguide and the straight waveguide. A method of producing the microring resonator includes using the determined parameters to produce, and a critically coupled microring resonator includes, a ring-shaped or microring waveguide spaced from the bus waveguide by a gap.

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