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US 11,169,325 B2Granted
Filtering device in a waveguide
AssigneeSTMicroelectronics (Crolles 2) SAS
InventorsSylvain Guerber, Charles Baudot
Life of this patent
Estimating the term…
Abstract
An optical waveguide is configured to propagate a light signal. Metal vias are arranged along and on either side of a portion of the optical waveguide. Additional metal vias are further arranged along and on either side of the optical waveguide both upstream and downstream of the portion of the optical waveguide. The metal vias and additional metal vias are oriented orthogonal to a same plane, the same plane being orthogonal to a transverse cross-section of the portion of the optical waveguide.
Claims37
A device, comprising:
- an optical waveguide through which a light signal propagates;
- and
- a filtering device formed by a plurality of metal vias arranged along and on either side of a portion of the optical waveguide and configured to filter parasitic optical modes radiated from the optical waveguide;
- wherein, in a plane orthogonal to the metal vias, a distance between the metal vias and said portion of the optical waveguide is shorter than a maximum distance beyond which power of a parasitic optical mode is smaller than −60 dB for the light signal to be propagated through the optical waveguide.
1 more element
A device, comprising:
- an optical waveguide through which a light signal propagates;
- and
- a filtering device formed by a plurality of metal vias arranged along and on either side of a portion of the optical waveguide and configured to filter parasitic optical modes radiated from the optical waveguide;
- wherein, in a plane orthogonal to the metal vias, a distance between the metal vias and said portion of the optical waveguide is shorter than a maximum distance equal to 1.7 μm.
1 more element
A device, comprising:
- an optical waveguide through which a light signal propagates;
- and
- a filtering device formed by a plurality of metal vias arranged along and on either side of a portion of the optical waveguide and configured to filter parasitic optical modes radiated from the optical waveguide;
- additional metal vias along and on either side of the optical waveguide both upstream and downstream of said portion of the optical waveguide;
- wherein the additional metal vias along the optical waveguide both upstream and downstream of said portion of the optical waveguide are configured so that an effective index of a guided optical mode for the light signal to be propagated through the optical waveguide varies progressively toward said portion of the optical waveguide.
2 more elements
A device, comprising:
- an optical waveguide through which a light signal propagates;
- and
- a filtering device formed by a plurality of metal vias arranged along and on either side of a portion of the optical waveguide and configured to filter parasitic optical modes radiated from the optical waveguide;
- a strip of a material absorbing at wavelengths of the light signal to be transmitted by the optical waveguide, said strip of the material being parallel to a plane orthogonal to the metal vias, at least partly arranged opposite said portion of the optical waveguide and configured to at least partly absorb parasitic optical modes radiated from said portion of the optical waveguide when the light signal propagates through the optical waveguide.
1 more element
A device, comprising:
- an optical waveguide through which a light signal propagates;
- and
- a filtering device formed by a plurality of metal vias arranged along and on either side of a portion of the optical waveguide and configured to filter parasitic optical modes radiated from the optical waveguide;
- wherein said portion of the optical waveguide extends between two additional portions of the optical waveguide, the two additional portions being configured so that an effective index of a guided optical mode of the light signal to be propagated through the optical waveguide varies progressively toward said portion of the optical waveguide.
1 more element
A device, comprising:
- an optical waveguide;
- a plurality of metal vias arranged extending along and on either side of a portion of the optical waveguide;
- and
- a plurality of additional metal vias arranged extending along and on either side of the optical waveguide both upstream and downstream of said portion of the optical waveguide;
- wherein the plurality of additional metal vias are configured so that an effective index of a guided optical mode of a light signal to be propagated through the optical waveguide varies progressively toward said portion of the optical waveguide.
2 more elements
Dependencies are inferred from the claim text.