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US 8,542,960 B2Granted
Tunable ring resonator
AssigneeHewlett-Packard Development Company, L.P.
InventorsDavid Fattal, Sagi Mathal, Marco Fiorentino, Charles Santori, Robert G Walmsley
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Abstract
A ring resonator has a first optical waveguide arranged in a loop, a second optical waveguide tangentially optically coupled to the first optical waveguide, and a translatable body configured to selectively move into an evanescent field region of said first optical waveguide.
Claims20
A ring resonator, comprising:
- a first optical waveguide arranged in a loop;
- a second optical waveguide that is tangentially optically coupled to said first optical waveguide;
- a first doped semiconductor region, said first doped semiconductor region being surrounded by said loop of said first optical waveguide and electrically coupled to a first electrode that extends from said first doped semiconductor region across a portion of said first optical waveguide;
- a second doped semiconductor region disposed outside of said loop of said first optical waveguide, said second doped semiconductor region being electrically coupled to a second electrode such that a selectively applied voltage between said first and second electrodes selectively injects or removes charge from said first optical waveguide;
- and
- a translatable body configured to selectively move into an evanescent field region of said first optical waveguide, said translatable body comprising a curved portion configured to substantially overlap a majority of said first optical waveguide without crossing said first electrode.
3 more elements
An optical system, comprising:
- a ring resonator having;
- a first optical waveguide arranged in a loom;
- a second optical waveguide that is tangentially optically coupled to said first optical waveguide;
- a first doped semiconductor region, said first doped semiconductor region being surrounded by said loop of said first optical waveguide and electrically coupled to a first electrode that extends from said first doped semiconductor region across a portion of said first optical waveguide;
- a second doped semiconductor region disposed outside of said loop of said first optical waveguide, said second doped semiconductor region being electrically coupled to a second electrode;
- and
- a translatable body configured to selectively move into an evanescent field region of said first optical waveguide, said translatable body comprising a curved portion configured to substantially overlap a majority of said first optical waveguide without crossing said first electrode;
- and
- a controller configured to selectively tune a resonant frequency of said ring resonator by selectively controlling a position of said translatable body and modulate light transmitted through said ring resonator by selectively applying a voltage between said first and second electrodes.
6 more elements
A method of selectively tuning a ring resonator, said method comprising:
- providing an optical ring resonator having:
- an optical waveguide arranged in a loop;
- a first doped semiconductor region, said first doped semiconductor region being surrounded by said loop of said first optical waveguide and electrically coupled to a first electrode that extends from said first doped semiconductor region across a portion of said first optical waveguide;
- a second doped semiconductor region disposed outside of said loop of said first optical waveguide, said second doped semiconductor region being electrically coupled to a second electrode;
- and
- a translatable body comprising a curved portion configured to substantially overlap a majority of said first optical waveguide without crossing said first electrode;
- and
- selectively altering a resonant frequency of said resonator by selectively positioning said translatable body within an evanescent field region of said optical waveguide.
5 more elements
Dependencies are inferred from the claim text.