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US 8,559,769 B2Granted
All-optical phase shifter in silicon
AssigneeAlcatel Lucent
InventorMahmoud Rasras
Life of this patent
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Abstract
A device includes a semiconductor waveguide and a control signal waveguide formed along a planar surface of a substrate. The control signal waveguide includes a segment located along and proximate a segment of the semiconductor waveguide. The control signal waveguide is configured to photo-excite charge carriers in said semiconductor waveguide.
Claims20
A device, comprising:
- a substrate having a planar surface;
- a semiconductor waveguide located along said planar surface;
- and
- a control signal waveguide having a segment located along and proximate a segment of said semiconductor waveguide;
- and
- wherein the control signal waveguide is configured to photo-excite charge carriers in said semiconductor waveguide.
3 more elements
A system, comprising:
- a substrate having a surface;
- a electrical control region along said surface of said substrate, the region including at least one electrical device being configured to produce an optical control signal;
- and
- a second region of said substrate that is laterally separated from the electrical control region and includes at least one all-Optical device being configured to receive said optical control signal,
- wherein said optical device includes:
- a semiconductor waveguide located along the surface of the substrate;
- and
- a control signal waveguide having a segment located along and proximate to a segment of said semiconductor waveguide;
- and
- wherein the control signal waveguide is configured to photo-excite charge carriers within said semiconductor waveguide.
7 more elements
A method, comprising:
- providing a semiconductor waveguide along a surface of a substrate, said semiconductor waveguide being formed from a semiconductor material having a bandgap energy;
- forming a control signal waveguide located along and proximate to a segment of said semiconductor waveguide;
- optically coupling said control signal waveguide to an optical source that is capable of producing an optical control signal at a wavelength that has an associated energy greater than the bandgap energy.
Dependencies are inferred from the claim text.