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    Optical ring modulator with photonic crystal
    4.
    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
    6.
    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).

    Optical couplers for transitioning between a single-layer waveguide and a multiple-layer waveguide
    8.
    发明授权
    Optical couplers for transitioning between a single-layer waveguide and a multiple-layer waveguide 有权

    公开(公告)号：US12271030B2

    公开(公告)日：2025-04-08

    申请号：US17952969

    申请日：2022-09-26

    Applicant: GlobalFoundries U.S. Inc.

    Inventor： Yusheng Bian ,  Won Suk Lee

    IPC: G02B6/122 ,  G02B6/12 ,  G02B6/13

    Abstract: Structures for an optical coupler and methods of forming a structure for an optical coupler. The structure comprises a stacked waveguide core including a first waveguide core and a second waveguide core. The first waveguide core includes a first tapered section, and the second waveguide core includes a second tapered section positioned to overlap with the first tapered section. The structure further comprises a third waveguide core including a third tapered section positioned adjacent to the first tapered section of the first waveguide core and the second tapered section of the second waveguide core.

    Structure with polarization device with light absorber with at least a hook shape
    9.
    发明授权
    Structure with polarization device with light absorber with at least a hook shape 有权

    公开(公告)号：US12189183B2

    公开(公告)日：2025-01-07

    申请号：US18046189

    申请日：2022-10-13

    Applicant: GlobalFoundries U.S. Inc.

    Inventor： Yusheng Bian ,  Won Suk Lee ,  Andreas D. Stricker

    IPC: G02B6/126 ,  G02B6/122 ,  G02B6/27 ,  G02B6/12 ,  G02B6/125

    Abstract: A structure includes a polarization device such as a polarization splitter, a polarization combiner or a polarization splitter rotator including a waveguide having a light absorber at an end section with an at least hook shape, e.g., it can be hooked or spiral shape. The structure also includes another waveguide adjacent the stated waveguide. The hook or spiral shape acts as a light absorber that reduces undesired optical noise such as excessive light insertion loss and/or light scattering. The hook or spiral shape may also be used on supplemental waveguides used to further filter and/or refine an optical signal in one of the waveguides of the polarization device, e.g., downstream of an output section of the polarization splitter and/or rotator.

    OPTICAL DEVICE WITH LOW-LOSS THERMALLY TUNABLE CLOSED-CURVE OPTICAL WAVEGUIDE
    10.
    发明申请
    OPTICAL DEVICE WITH LOW-LOSS THERMALLY TUNABLE CLOSED-CURVE OPTICAL WAVEGUIDE 有权

    公开(公告)号：US20230073958A1

    公开(公告)日：2023-03-09

    申请号：US18055576

    申请日：2022-11-15

    Applicant: GlobalFoundries U.S. Inc.

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

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