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    Optical ring modulator with photonic crystal
    31.
    发明授权
    Optical ring modulator with photonic crystal 有权

    公开(公告)号：US11609475B2

    公开(公告)日：2023-03-21

    申请号：US17119042

    申请日：2020-12-11

    Applicant: GLOBALFOUNDRIES U.S. INC.

    Inventor： Michal Rakowski ,  Yusheng Bian ,  Won Suk Lee ,  Roderick A. Augur

    IPC: G02F1/225

    Abstract: Embodiments of the disclosure provide an optical ring modulator. The optical ring modulator includes waveguide with a first semiconductor material of a first doping type, and a second semiconductor material having a second doping type adjacent the first semiconductor material. A P-N junction is between the first semiconductor material and the second semiconductor material. A plurality of photonic crystal layers, each embedded within the first semiconductor material or the second semiconductor material, has an upper surface that is substantially coplanar with an upper surface of the waveguide structure.

    OPTICAL DEVICE WITH LOW-LOSS THERMALLY TUNABLE CLOSED-CURVE OPTICAL WAVEGUIDE
    34.
    发明申请
    OPTICAL DEVICE WITH LOW-LOSS THERMALLY TUNABLE CLOSED-CURVE OPTICAL WAVEGUIDE 有权

    公开(公告)号：US20230003937A1

    公开(公告)日：2023-01-05

    申请号：US17363846

    申请日：2021-06-30

    Applicant: GLOBALFOUNDRIES U.S. Inc.

    Inventor： Michal Rakowski ,  Petar I. Todorov ,  Yusheng Bian ,  Won Suk Lee ,  Asif J. Chowdhury ,  Kenneth Giewont

    IPC: G02B6/125 ,  G02F1/01

    Abstract: Disclosed is a photonic structure and associated method. The structure includes a closed-curve waveguide having a first height, as measured from the top surface of an insulator layer, and an outer curved sidewall that extends essentially vertically the full first height (e.g., to minimize signal loss). The structure includes a closed-curve thermal coupler and a heating element. The closed-curve thermal coupler is thermally coupled to and laterally surrounded by the closed-curve waveguide and has a second height that is less than the first height. In some embodiments, the closed-curve waveguide and the closed-curve thermal coupler are continuous portions of the same semiconductor layer having different thicknesses. The heating element is thermally coupled to the closed-curve thermal coupler and thereby indirectly thermally coupled to the closed-curve waveguide. Thus, the heating element is usable for thermally tuning the closed-curve waveguide via the closed-curve thermal coupler to minimize any temperature-dependent resonance shift (TDRS).

    BROADBAND OPTICAL SWITCHES BASED ON A RING-ASSISTED MACH-ZHENDER INTERFEROMETER
    40.
    发明申请
    BROADBAND OPTICAL SWITCHES BASED ON A RING-ASSISTED MACH-ZHENDER INTERFEROMETER 有权

    公开(公告)号：US20240419047A1

    公开(公告)日：2024-12-19

    申请号：US18210151

    申请日：2023-06-15

    Applicant: GlobalFoundries U.S. Inc.

    Inventor： Michal Rakowski ,  Sujith Chandran ,  Takako Hirokawa ,  Pilar Gonzalez

    IPC: G02F1/225 ,  G02F1/01 ,  G02F1/21

    Abstract: Structures for a broadband optical switch and methods of forming such structures. The structure comprises a Mach-Zehnder interferometer including first and second arms. The first arm comprises a first waveguide core, and the second arm comprises a second waveguide core. The structure further comprises a ring resonator comprising a third waveguide core that has a first thickness. A portion of the third waveguide core is adjacent to a portion of the first waveguide core over a light coupling region. A slab layer connects the portion of the first waveguide core to the portion of the third waveguide core. The slab layer has a second thickness that is less than the first thickness of the first waveguide core.

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