Polarization splitter-rotator
AssigneeLumentum Operations LLC
InventorsMd Borhan MIA, Kenneth A. MCGREER, Erman TIMURDOGAN
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Abstract
A photonic integrated circuit (PIC) may include a polarization rotator. The polarization rotator may include a first waveguide layer comprising a first set of waveguides. At least one waveguide of the first set of waveguides may be a segmented waveguide. The polarization rotator may include a second waveguide layer comprising a second set of waveguides. A refractive index of a core material of the second set of waveguides may be less than a refractive index of a core material of the first set of waveguides.
Claims29
A photonic integrated circuit (PIC) comprising a polarization rotator, the polarization rotator comprising:
- a first waveguide layer comprising a first set of waveguides, wherein at least one waveguide of the first set of waveguides is a segmented waveguide;
- and
- a second waveguide layer comprising a second set of waveguides,
- wherein a refractive index of a core material of the second set of waveguides is less than a refractive index of a core material of the first set of waveguides.
A photonic integrated circuit (PIC) comprising a polarization splitter-rotator, the polarization splitter-rotator comprising:
- a polarization rotator including:
- a first set of waveguides in a first waveguide layer, wherein at least one waveguide of the first set of waveguides is a segmented waveguide, and
- a second set of waveguides in a second waveguide layer,
- wherein a refractive index of a core material of the second set of waveguides is less than a refractive index of a core material of the first set of waveguides;
- and
- a polarization splitter and a mode splitter, wherein the polarization splitter is optically connected to the mode splitter.
A photonic integrated circuit (PIC) comprising a polarization rotator, the polarization rotator comprising:
- a silicon (Si) waveguide layer comprising a set of segmented Si waveguides,
- wherein a periodicity of a segmented Si waveguide in the set of segmented Si waveguides less than approximately 900 nanometers (nm), and
- wherein a filling fraction of the segmented Si waveguide is in a range from approximately 0.1 to approximately 0.8;
- and
- a silicon nitride (SiNx) waveguide layer comprising a set of SiNx waveguides.
Dependencies are inferred from the claim text.