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    BROADBAND OPTICAL SWITCHES BASED ON A RING-ASSISTED MACH-ZHENDER INTERFEROMETER
    42.
    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.

    ELECTRO-ABSORPTION MODULATORS WITH STACKED WAVEGUIDE TAPERS
    43.
    发明公开
    ELECTRO-ABSORPTION MODULATORS WITH STACKED WAVEGUIDE TAPERS 审中-公开

    公开(公告)号：US20240085624A1

    公开(公告)日：2024-03-14

    申请号：US17944252

    申请日：2022-09-14

    Applicant: GlobalFoundries U.S. Inc.

    Inventor： Yusheng Bian ,  Steven M. Shank ,  Judson Holt ,  Michal Rakowski ,  Bartlomiej Jan Pawlak

    IPC: G02B6/122 ,  G02B6/13

    CPC classification number: G02B6/1228 ,  G02B6/13

    Abstract: Structures including an electro-absorption modulator and methods of forming such structures. The structure comprises a waveguide core including a first tapered section, a second tapered section, and a longitudinal axis. The first tapered section and the second tapered section are aligned along the longitudinal axis. The structure further comprises a first waveguide taper overlapping the first tapered section of the waveguide core, a second waveguide taper overlapping the second tapered section of the waveguide core, and a multiple-layer structure on the waveguide core between the first waveguide taper and the second waveguide taper.

    Photonic devices integrated with reflectors
    44.
    发明授权
    Photonic devices integrated with reflectors 有权

    公开(公告)号：US11852867B2

    公开(公告)日：2023-12-26

    申请号：US17454063

    申请日：2021-11-09

    Applicant: GLOBALFOUNDRIES U.S. Inc.

    Inventor： Yusheng Bian ,  Bo Peng ,  Michal Rakowski

    IPC: G02B6/122 ,  G02B6/12

    CPC classification number: G02B6/1225 ,  G02B2006/1213 ,  G02B2006/12104

    Abstract: The present disclosure generally relates to semiconductor devices for use in optoelectronic/photonic applications and integrated circuit (IC) chips. More particularly, the present disclosure relates to semiconductor devices having a reflector and a photonic component and a method of forming the same. The present disclosure provides a semiconductor device having a substrate, a photonic component arranged above the substrate, a bottom reflector arranged above the substrate and positioned below the photonic component, in which the bottom reflector has a plurality of grating structures configured to reflect electromagnetic waves towards the photonic component, and a top reflector arranged above the photonic component, in which the top reflector has a plurality of grating structures configured to reflect electromagnetic waves towards the photonic component.

    Optical device with low-loss thermally tunable closed-curve optical waveguide
    45.
    发明授权
    Optical device with low-loss thermally tunable closed-curve optical waveguide 有权

    公开(公告)号：US11555964B1

    公开(公告)日：2023-01-17

    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 J. Giewont

    IPC: G02B6/125 ,  G02F1/01 ,  G02B6/136 ,  G02B6/12

    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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