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    WAVEGUIDE ESCALATORS FOR A PHOTONICS CHIP
    62.
    发明公开
    WAVEGUIDE ESCALATORS FOR A PHOTONICS CHIP 审中-公开

    公开(公告)号：US20240288631A1

    公开(公告)日：2024-08-29

    申请号：US18115046

    申请日：2023-02-28

    Applicant: GlobalFoundries U.S. Inc.

    Inventor： Yusheng Bian ,  Kevin Dezfulian ,  Kenneth Giewont ,  Karen Nummy

    IPC: G02B6/12

    CPC classification number: G02B6/12004 ,  G02B2006/12061 ,  G02B6/136

    Abstract: Structures for a waveguide escalator and methods of forming such structures. A structure comprises a first waveguide core, and a back-end-of-line stack including a first dielectric layer, a second dielectric layer on the first dielectric layer, an opening in the second dielectric layer, a second waveguide core including a section that overlaps with a section of the first waveguide core, and a plurality of third waveguide cores disposed between the section of the first waveguide core and the section of the second waveguide core. The plurality of third waveguide cores are positioned inside the opening in the second dielectric layer, the first dielectric layer comprises a first material with a first refractive index, and the second dielectric layer comprises a second material with a second refractive index different from the first refractive index.

    DIRECTIONAL COUPLERS WITH HETEROGENOUS CLADDINGS
    63.
    发明公开
    DIRECTIONAL COUPLERS WITH HETEROGENOUS CLADDINGS 审中-公开

    公开(公告)号：US20240241314A1

    公开(公告)日：2024-07-18

    申请号：US18096607

    申请日：2023-01-13

    Applicant: GlobalFoundries U.S. Inc.

    Inventor： Yusheng Bian

    IPC: G02B6/125 ,  G02B6/124

    CPC classification number: G02B6/125 ,  G02B6/124 ,  G02B2006/12147

    Abstract: Structures for a directional coupler and methods of forming a structure for a directional coupler. The structure comprises a first waveguide core including a first plurality of segments, and a second waveguide core including a second plurality of segments disposed adjacent to the first plurality of segments in a coupling region. The structure further comprises a first cladding layer comprising a first material that has a first refractive index, and a second cladding layer comprising a second material that has a second refractive index different from the first refractive index. The first cladding layer adjoins a first sidewall of each of the first plurality of segments and a first sidewall of each of the second plurality of segments, and the second cladding layer adjoins a second sidewall of each of the first plurality of segments and a second sidewall of each of the second plurality of segments.

    Optical waveguide with stacked cladding material layers
    66.
    发明授权
    Optical waveguide with stacked cladding material layers 有权

    公开(公告)号：US11971572B2

    公开(公告)日：2024-04-30

    申请号：US17674905

    申请日：2022-02-18

    Applicant: GlobalFoundries U.S. Inc.

    Inventor： Shesh Mani Pandey ,  Yusheng Bian ,  Francis O. Afzal

    IPC: G02B6/036 ,  G02B6/028

    CPC classification number: G02B6/0288 ,  G02B6/036

    Abstract: Disclosed is an optical waveguide including a waveguide core and waveguide cladding surrounding the waveguide core. The waveguide cladding includes at least one stack of cladding material layers positioned laterally adjacent to a sidewall of the waveguide core such that each cladding material layer in the stack abuts the sidewall of the waveguide core. Each of the cladding material layers in the stack has a smaller refractive index than the waveguide core and at least two of the cladding material layers in the stack have different refractive indices, thereby tailoring field confinement and reshaping the optical mode. Different embodiments include different numbers of cladding material layers in the stack, different stacking orders of the cladding material layers, different waveguide core types, symmetric or asymmetric cladding structures on opposite sides of the waveguide core, etc. Also disclosed is a method of forming the optical waveguide.

    WAVEGUIDE CROSSINGS WITH A FREE SPACE PROPAGATION REGION
    69.
    发明公开
    WAVEGUIDE CROSSINGS WITH A FREE SPACE PROPAGATION REGION 审中-公开

    公开(公告)号：US20240027684A1

    公开(公告)日：2024-01-25

    申请号：US17869065

    申请日：2022-07-20

    Applicant: GlobalFoundries U.S. Inc.

    Inventor： Yusheng Bian

    IPC: G02B6/125 ,  G02B6/122 ,  G02B6/136

    CPC classification number: G02B6/125 ,  G02B6/1228 ,  G02B6/136 ,  G02B2006/12061

    Abstract: Structures for a waveguide crossing and methods of forming such structures. The structure comprises a first waveguide core including a first section, a second section, and a first longitudinal axis. The first section and the second section are aligned along the first longitudinal axis, the first section is terminated by a first end, the second section is terminated by a second end, and the first end of the first section is longitudinally spaced from the second end of the second section by a gap. The structure further comprises a second waveguide core having a second longitudinal axis angled relative to the first longitudinal axis. The second longitudinal axis of the second waveguide core crosses the first longitudinal axis of the first waveguide core within the gap.

    GRATINGS WITH NON-RECTANGULAR SEGMENTS
    70.
    发明公开
    GRATINGS WITH NON-RECTANGULAR SEGMENTS 审中-公开

    公开(公告)号：US20240012200A1

    公开(公告)日：2024-01-11

    申请号：US17861345

    申请日：2022-07-11

    Applicant: GlobalFoundries U.S. Inc.

    Inventor： Yusheng Bian

    IPC: G02B6/124 ,  G02B6/122 ,  G02B6/13

    CPC classification number: G02B6/124 ,  G02B6/1228 ,  G02B6/13 ,  G02B2006/12121

    Abstract: Structures for a grating that may be deployed in edge coupler and methods of forming such structures. The structure comprises a waveguide core positioned on a substrate. The waveguide core includes a longitudinal axis and a grating having first and second segments positioned along the longitudinal axis in a spaced-apart arrangement. The first segment has a first sidewall sloped at a first angle relative to the longitudinal axis and a second sidewall oriented transverse to the longitudinal axis. The second segment has a first sidewall sloped at a second angle relative to the longitudinal axis and a second sidewall oriented transverse to the longitudinal axis. The first sidewall of the first segment positioned adjacent to the first sidewall of the second segment.

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