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    Wafer-scale-integrated silicon-photonics-based optical switching system and method of forming
    1.
    发明授权
    Wafer-scale-integrated silicon-photonics-based optical switching system and method of forming 有权

    公开(公告)号：US11994720B2

    公开(公告)日：2024-05-28

    申请号：US18206343

    申请日：2023-06-06

    Applicant: The Regents of the University of California

    Inventor： Tae Joon Seok ,  Ming Chiang A Wu

    IPC: G02B6/35 ,  G02B6/12 ,  G02B6/293

    CPC classification number: G02B6/3546 ,  G02B6/3508 ,  G02B6/12007 ,  G02B2006/12145 ,  G02B6/29344

    Abstract: A large-scale single-photonics-based optical switching system that occupies an area larger than the maximum area of a standard step-and-repeat lithography reticle is disclosed. The system includes a plurality of identical switch blocks, each of is formed in a different reticle field that no larger than the maximum reticle size. Bus waveguides of laterally adjacent switch blocks are stitched together at lateral interfaces that include a second arrangement of waveguide ports that is common to all lateral interfaces. Bus waveguides of vertically adjacent switch blocks are stitched together at vertical interfaces that include a first arrangement of waveguide ports that is common to all vertical interfaces. In some embodiments, the lateral and vertical interfaces include waveguide ports having waveguide coupling regions that are configured to mitigate optical loss due to stitching error.

    OPTICAL COUPLER AND VISIBLE LIGHT SOURCE MODULE
    2.
    发明公开
    OPTICAL COUPLER AND VISIBLE LIGHT SOURCE MODULE 审中-公开

    公开(公告)号：US20240126015A1

    公开(公告)日：2024-04-18

    申请号：US18377602

    申请日：2023-10-06

    Applicant: TDK CORPORATION

    Inventor： Hajime UTSUNOMIYA ,  Yasuhiro TAKAGI ,  Hiroki HARA ,  Atsushi SHIMURA ,  Jiro YOSHINARI ,  Takashi KIKUKAWA ,  Tsuyoshi KOMAKI ,  Hideaki FUKUZAWA

    IPC: G02B6/293

    CPC classification number: G02B6/29344

    Abstract: This optical coupler for coupling a plurality of visible light beams having different wavelengths includes: a substrate made of a material different from lithium niobate; and an optical coupling function layer formed on a main surface of the substrate. The optical coupling function layer includes: two multimode-interference-type optical coupling parts; optical-input-side waveguides and an optical-output-side waveguide connected to one multimode-interference-type optical coupling part, and optical-input-side waveguides and an optical-output-side waveguide connected to the other multimode-interference-type optical coupling part. The multimode-interference-type optical coupling parts, the optical-input-side waveguides, and the optical-output-side waveguides are made of a lithium niobate film.

    Phased-array mapping for beamspace processing and beamspace processor
    4.
    发明授权
    Phased-array mapping for beamspace processing and beamspace processor 有权

    公开(公告)号：US11855692B2

    公开(公告)日：2023-12-26

    申请号：US17160676

    申请日：2021-01-28

    Applicant: PHASE SENSITIVE INNOVATIONS, INC.

    Inventor： Janusz Murakowski ,  Garrett Schneider

    IPC: H04B10/25 ,  H04R9/08 ,  H04B10/2575 ,  G02B6/12 ,  G02B6/293

    CPC classification number: H04B10/2575 ,  G02B6/12019 ,  G02B6/29344 ,  H04R9/08 ,  H04B2210/006

    Abstract: An apparatus and method is provided to correlate radiation beams, such as RF beams, optical beams, and/or acoustic beams. A plurality of sensors are distributed according to a first pattern and disposed adjacent to a first interference region. The plurality of sensors may capture incoming radiation and convert the incoming radiation to a plurality of signals. A plurality of radiating elements are distributed according to a second pattern that differs from the first pattern and are disposed adjacent to a second interference region. A plurality of channels are connected between the sensors and the radiating elements, each channel connecting a corresponding sensor to receive a corresponding signal. Each of the radiating elements is in communication with a corresponding one of the plurality of channels to provide an outgoing radiation corresponding to the signal received by the channel. The second pattern has a relationship to the first pattern such that first and second beams of incoming radiation in the first interference region captured by the plurality of sensors are respectively mapped to corresponding first and second beams of outgoing radiation emitted by the plurality of radiating elements into the second interference region.

    OPTICAL STRUCTURE
    5.
    发明公开
    OPTICAL STRUCTURE 审中-公开

    公开(公告)号：US20230384524A1

    公开(公告)日：2023-11-30

    申请号：US18324008

    申请日：2023-05-25

    Applicant: Axenic LImited

    Inventor： Rob Walker

    IPC: G02B6/293

    CPC classification number: G02B6/29344

    Abstract: An optical structure comprising



    a multimode interference waveguide section, the multimode interference waveguide section comprising an input face, an output face and sidewalls extending therebetween, the sidewalls extending substantially parallel to a length axis;
    at least one input optical waveguide abutting the input face and spaced apart from the sidewalls;
    at least one output optical waveguide abutting the output face and spaced apart from the sidewalls;
    the input face being divided into first and second input face shoulder portions arranged on opposite sides of the at least one input optical waveguide; and
    the output face being divided into first and second output face shoulder portions arranged on opposite sides of the at least one output optical waveguide;
    the optical structure further comprising at least one external reflector appendage, the at least one external reflector appendage comprising a reflector portion integrally extending from a shoulder portion and an appendage waveguide integrally extending from the reflector portion along an axis inclined to the length axis, the reflector portion comprising a reflector wall arranged such that light travelling parallel to the length axis which is incident on the reflector wall is reflected into the appendage waveguide.

    Optical couplers and hybrids
    6.
    发明授权
    Optical couplers and hybrids 有权

    公开(公告)号：US11740411B2

    公开(公告)日：2023-08-29

    申请号：US17660072

    申请日：2022-04-21

    Applicant: II-VI Delaware, Inc.

    Inventor： Po Dong

    IPC: G02B6/27 ,  G02B6/293 ,  G02B6/122 ,  G02B6/12

    CPC classification number: G02B6/2773 ,  G02B6/29301 ,  G02B6/29302 ,  G02B6/29344 ,  G02B6/29379 ,  G02B6/1228 ,  G02B2006/1215 ,  G02B2006/12119

    Abstract: An optical circuit for routing a signal includes a coupler and first and second waveguides. The coupler has an input for the signal and has first and second outputs. The first waveguide has a first optical connection to the first output, and the second waveguide has a second optical connection to the second output. Both waveguides have the same propagation length. The first and second waveguides include different widths at the respective optical connections to the respective outputs. This coupler can be used with another input couplers, two additional waveguides, and two 2×2 output couplers to provide a 90-degree hybrid for mixing signal light and local oscillator light in a coherent receiver or the like.

    Temperature insensitive delay line interferometer
    9.
    发明授权
    Temperature insensitive delay line interferometer 有权

    公开(公告)号：US09929814B2

    公开(公告)日：2018-03-27

    申请号：US15148710

    申请日：2016-05-06

    Applicant: INPHI CORPORATION

    Inventor： Masaki Kato ,  Radhakrishnan L. Nagarajan

    IPC: H04B10/2507 ,  H04B10/67 ,  H04J14/02 ,  H04B10/69

    CPC classification number: H04B10/677 ,  G02B6/12007 ,  G02B6/12028 ,  G02B6/2813 ,  G02B6/29344 ,  G02B6/29352 ,  H04B10/69 ,  H04J14/02

    Abstract: A silicon photonics based temperature-insensitive delay line interferometer (DLI). The DLI includes a first arm comprising a first length of a first material characterized by a first group index corresponding to a first phase delay to transfer a first light wave with a first peak frequency and a second arm comprising a second length of a second material characterized by a second group index corresponding to a second phase to transfer a second light wave with a second peak frequency with a time-delay difference relative to the first light wave. The first phase delay and the second phase delay are configured to change equally upon a change of temperature. The time-delay difference between the first light wave and the second light wave is set to be inversed value of a free spectral range (FSR) to align at least the first peak frequency to a channel of a designated frequency grid.

    TEMPERATURE INSENSITIVE DELAY LINE INTERFEROMETER
    10.
    发明申请
    TEMPERATURE INSENSITIVE DELAY LINE INTERFEROMETER 有权

    公开(公告)号：US20170324482A1

    公开(公告)日：2017-11-09

    申请号：US15148710

    申请日：2016-05-06

    Applicant: INPHI CORPORATION

    Inventor： Masaki KATO ,  Radhakrishnan L. NAGARAJAN

    IPC: H04B10/67 ,  H04J14/02 ,  H04B10/69

    CPC classification number: H04B10/677 ,  G02B6/12007 ,  G02B6/12028 ,  G02B6/2813 ,  G02B6/29344 ,  G02B6/29352 ,  H04B10/69 ,  H04J14/02

    Abstract: A silicon photonics based temperature-insensitive delay line interferometer (DLI). The DLI includes a first arm comprising a first length of a first material characterized by a first group index corresponding to a first phase delay to transfer a first light wave with a first peak frequency and a second arm comprising a second length of a second material characterized by a second group index corresponding to a second phase to transfer a second light wave with a second peak frequency with a time-delay difference relative to the first light wave. The first phase delay and the second phase delay are configured to change equally upon a change of temperature. The time-delay difference between the first light wave and the second light wave is set to be inversed value of a free spectral range (FSR) to align at least the first peak frequency to a channel of a designated frequency grid.

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