Magneto-optical waveguide device and coupling methods
AssigneeInternational Business Machines Corporation
InventorsBarnim Alexander JANTA-POLCZYNSKI, Francois Menard
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Abstract
A magneto-optical waveguide device includes a waveguide coupled with a magneto-optical crystal material. The magneto-optical waveguide device includes a patterned nanostructure within the magneto-optical crystal material that includes an internal optical waveguide through the magneto-optical crystal material. The patterned nanostructure modifies the refractive index of the magneto-optical crystal material below diffraction limit. The patterned nanostructure creates metamaterial effective properties that optimize core-cladding inside the magneto-optical crystal material to create the optical waveguide.
Claims21
A magneto-optical waveguide device comprising:
- an input port comprising first and second optical waveguide input ports;
- an output port comprising an optical waveguide output port;
- a magneto-optical crystal material to which the input port and the output port are coupled;
- and
- a patterned nanostructure within the magneto-optical crystal material comprising an internal optical waveguide through the magneto-optical crystal material, wherein the patterned nanostructure modifies the refractive index of the magnetic-optical crystal material below diffraction limit and wherein the patterned nanostructure creates metamaterial effective properties that optimize core-cladding inside the magneto-optical crystal material to create the internal optical waveguide,
- wherein:
- a first signal propagating in a first direction and received by the first optical waveguide input port is transmitted through the internal optical waveguide to the optical waveguide output port,
- a second signal propagating in a second direction opposite the first direction and received by the optical waveguide output port is transmitted through the internal optical waveguide to the second optical waveguide input port, and
- the internal optical waveguide comprises a multimode interference (MMI) device.
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An integrated optical waveguide circuit comprising:
- first and second input optical waveguides;
- an output optical waveguide;
- and
- a magneto-optical waveguide device coupled to the first and second input optical waveguides and the output optical waveguide, the magneto-optical waveguide comprising a patterned nanostructure within a magneto-optical crystal material, wherein the magneto-optical waveguide device induces a non-reciprocal phase shift (NRPS) on optical signals traversing through the magneto-optical waveguide device and so that:
- a first signal propagating in a first direction and received by the first input optical waveguide is transmitted through the magneto-optical waveguide device to the output optical waveguide, and
- optical back reflections are directed from the output optical waveguide to the second input optical waveguide, and
- wherein the magneto-optical waveguide comprises a multimode interference (MMI) device.
A magneto-optical waveguide device comprising:
- first and second optical waveguide input ports;
- an optical waveguide output port;
- and
- a patterned nanostructure within a magneto-optical crystal material comprising an internal optical waveguide, wherein the patterned nanostructure modifies the refractive index of the magnetic-optical crystal material below diffraction limit and creates metamaterial effective properties that optimize core-cladding inside the magneto-optical crystal material to create the internal optical waveguide,
- wherein:
- a first signal propagating in a first direction and received by the first optical waveguide input port is transmitted through the internal optical waveguide to the optical waveguide output port, and
- a second signal propagating in a second direction opposite the first direction and received by the optical waveguide output port is transmitted through the internal optical waveguide to the second optical waveguide input port,
- wherein the internal optical waveguide comprises a multimode interference (MMI) device.
Dependencies are inferred from the claim text.