Resonantly coupled waveguides using a taper
AssigneeUniversity of Maryland
InventorsSimarjeet S. Saini, Vijayanand Vusirikala, Peter J. Heim, Robert Ernest Bartolo, Mario Dagenais
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Abstract
A resonant coupler has a coupling region having first and second ends, a coupling length, and a tapered variable width, such that a phase matching condition for the waveguide is met within the coupling length. In an exemplary embodiment the first and second ends each have a corresponding variable width which varies at a rate greater than the variable width of the coupling length. In yet another embodiment the coupling region has an electrically sensitive phase matching characteristic and an electrode in operative relation with the coupling region for varying the phase matching characteristic.
Claims24
A resonant coupler for coupling modes between waveguides, comprising a coupling region having first and second ends, a coupling length, and a tapered region having variable width varying at a first selected rate, such that a phase matching condition for the waveguides is met within the coupling length of said coupling region.
A resonant coupler for coupling modes between waveguides, comprising:
- a coupling region having an electrically sensitive phase-matching condition, first and second ends, a coupling length. and a tapered region having a variable width varying at a first selected rate;
- and
- an electrode in operative relation with the coupling region for varying of the phase-matching condition, such that a phase matching condition for the waveguides is met within the coupling length of said coupling region when no bias voltage is applied to the electrode, and such that a phase matching condition for the waveguides is destroyed within the coupling length of said coupling region when a bias voltage is applied to the electrode.
A method of operating a resonant coupler for coupling modes between waveguides, the resonant coupler including a coupling region having an electrically sensitive phase-matching condition, first and second ends, a coupling length, and a tapered region having a variable width varying at a first selected rate, the method comprising:
- applying a bias voltage to the resonant coupler so that a phase matching condition for the waveguides is destroyed within the coupling length of said coupling region.
A resonant coupler for coupling modes between waveguides, comprising:
- a coupling region having an electrically sensitive phase-matching condition, first and second ends, a coupling length, and a tapered region having a variable width varying at a first selected rate;
- and
- an electrode in operative relation with the coupling region for varying of the phase-matching condition, such that a phase matching condition for the waveguides is destroyed within the coupling length of said coupling region when no bias voltage is applied to the electrode, and such that a phase matching condition for the waveguides is met within the coupling length of said coupling region when a bias voltage is applied to the electrode.
A method of operating a resonant coupler for coupling modes between waveguides, the resonant coupler including a coupling region having an electrically sensitive phase-matching condition, first and second ends, a coupling length, and a tapered region having a variable width varying at a first selected rate, the method comprising:
- applying a bias voltage to the resonant coupler so that a phase matching condition for the waveguides is established within the coupling length of said coupling region.
Dependencies are inferred from the claim text.