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    Ultra-long subwavelength grating based optical antenna for optical phased array
    2.
    发明授权
    Ultra-long subwavelength grating based optical antenna for optical phased array 有权

    公开(公告)号：US11940560B2

    公开(公告)日：2024-03-26

    申请号：US17168089

    申请日：2021-02-04

    Applicant: Harbin Institute of Technology, Shenzhen

    Inventor： Xiaochuan Xu ,  Jiaxin Chen ,  Wanxin Li ,  Yong Yao

    IPC: H01Q3/26 ,  G01S7/481 ,  G02B6/124 ,  G02F1/295

    CPC classification number: G01S7/4814 ,  G02B6/124 ,  G02F1/2955

    Abstract: An ultra-long sub-wavelength grating as an optical antenna for optical phased arrays includes a top structure and a bottom structure which are vertically stacked. The bottom structure is made of a material with a refractive index lower than a refractive index of the top structure. The top structure is made of a material with a refractive index higher than that of the bottom structure. A strip waveguide is disposed in the middle of the top structure. subwavelength blocks are disposed periodically on two sides of the straight strip waveguides. The invention has the following beneficial effects. The structure could increase the effective length of the grating; uniform near field distribution can be achieved by controlling the positions of the subwavelength blocks. The structure is simpler with lower fabrication requirements and lower cost.

    Free-space Beam Steering Systems, Devices, and Methods
    5.
    发明公开
    Free-space Beam Steering Systems, Devices, and Methods 审中-公开

    公开(公告)号：US20230280633A1

    公开(公告)日：2023-09-07

    申请号：US18115741

    申请日：2023-02-28

    Applicant: Jason W. Sickler

    Inventor： Jason W. Sickler

    IPC: G02F1/295

    CPC classification number: G02F1/295 ,  G02F1/2955 ,  G02F2203/24 ,  G01S7/4817

    Abstract: Devices and systems having a vertical waveguide array are provided having a plurality of vertical waveguides disposed on a support substrate in an array, where each vertical waveguide further includes a reflective layer positioned to reflect impinging light toward the support substrate, a core region extending from the reflective layer to the support substrate, the core region further comprising, a first contact region and a second contact region electrically isolated from one another disposed between the reflective layer and the support substrate, and a low refractive index material disposed between the first contact region and the second contact region. The first contact region and the second contact region are operable to create a voltage drop across the low refractive index material and the low refractive index material has a lower refractive index compared to the refractive indexes of the first contact region and the second contact region. Additionally, a confinement structure surrounds the periphery of each waveguide, where the confinement structure has a lower refractive index compared to the refractive indexes of the first contact region and the second contact region.

    Modular hybrid optical phased arrays
    6.
    发明授权
    Modular hybrid optical phased arrays 有权

    公开(公告)号：US11726383B2

    公开(公告)日：2023-08-15

    申请号：US17501971

    申请日：2021-10-14

    Applicant: California Institute of Technology

    Inventor： Seyed Ali Hajimiri

    IPC: G02F1/295 ,  H04B10/25

    CPC classification number: G02F1/2955 ,  H04B10/25

    Abstract: An optical phased array includes a first multitude of tiles forming an array of optical signal transmitters and/or receivers. Each such tile includes optical components for processing of an optical signal. The phased array further includes a second multitude of tiles each positioned below one of the first multitude of tiles. Each of the second multitude of tiles includes a circuit for processing of an electrical signal and is in electrical communication with one or more of the first multitude of tiles. Each of the first multitude of tiles is adapted to receive in a modular form, be adjacent to, and couple to at least one additional tile that is similar to that tile. Each of the second multitude of tiles is adapted to receive in a modular form, be adjacent to, and couple to at least one additional tile that is similar to that tile.

    ON-CHIP OPTICAL PHASED ARRAY USING A SERIAL GRATING ANTENNA DESIGN
    9.
    发明申请
    ON-CHIP OPTICAL PHASED ARRAY USING A SERIAL GRATING ANTENNA DESIGN 审中-公开

    公开(公告)号：US20190219888A1

    公开(公告)日：2019-07-18

    申请号：US15874779

    申请日：2018-01-18

    Applicant: Litexel Inc.

    Inventor： Xiaochen Sun ,  Lingxuan Zhang ,  Ningning Feng

    IPC: G02F1/295

    CPC classification number: G02F1/2955 ,  G02F2201/066 ,  G02F2201/302 ,  G02F2203/50

    Abstract: An on-chip optical phased array includes an array of photonic antenna units connected in series by photonic waveguides and arranged in a two-dimensional array to produce complex still and scanning optical patterns through optical interference effect. Each antenna unit includes an output photonic antenna (e.g. grating antenna), and a waveguide phase shifter for adjusting the optical phase of the optical beam output by the antenna unit. The grating antenna and the waveguide phase shifter are formed in the same optical wave guiding layer which includes a core layer between two cladding layers. The grating antennas may be a shallow-etched structure or a deep-etched edge-modulated grating. The optical phased array, including the array of photonic antenna units and the electrodes that connect and provide electrical power to them, can be made on a single chip of silicon using complementary metal-oxide-semiconductor (CMOS) or compatible fabrication processes.

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