LIGHT RECEIVING MODULE, DEVICE, AND METHOD
    1.
    发明公开

    公开(公告)号:US20240361516A1

    公开(公告)日:2024-10-31

    申请号:US18770283

    申请日:2024-07-11

    IPC分类号: G02B6/02 G02B6/12 H04B10/61

    摘要: A light receiving module is provided, including a beam contraction module, a multi-core multi-mode waveguide, and a detector. The beam contraction module is configured to receive a first optical signal, and contract a mode spot of the first optical signal, to obtain a second optical signal. The multi-core multi-mode waveguide includes a cladding layer and N waveguides. The multi-core multi-mode waveguide is configured to: receive the second optical signal, and concentrate energy of the second optical signal in a plurality of waveguides of the N waveguides, to obtain a plurality of third optical signals. A plurality of sub-detectors are in one-to-one correspondence with the plurality of third optical signals. The plurality of sub-detectors are configured to receive the plurality of third optical signals, to obtain a plurality of electrical signals based on the plurality of third optical signals.

    Multi-core fiber and manufacturing method thereof and multi-core fiber marker

    公开(公告)号:US12105321B2

    公开(公告)日:2024-10-01

    申请号:US17698796

    申请日:2022-03-18

    IPC分类号: G02B6/02 G02B6/44

    摘要: The present disclosure provides a multi-core fiber (MCF) and manufacturing method thereof and an MCF marker (or marker). The MCF (100) comprises a plurality of cores (102) and a marker (108). Each core is associated with a core diameter (104) and a core-placement-radius (106) and the marker (108) is associated with a marker diameter (110) and a marker-placement-radius (112). The marker has a marker core (116) and a marker clad (118) with a D/d ratio between 5 to 20. During manufacturing, the MCF is drawn from a preform assembly (200) having a top hollow handle (202) with a handle thickness (114) attached on a top end of a glass preform (204) that has a plurality of core holes (206) and a marker hole (210), wherein the marker hole (210) is at least partially covered by the top hollow handle of the handle thickness (114).

    MULTI-CORE OPTICAL FIBER AND MULTI-CORE OPTICAL FIBER CABLE

    公开(公告)号:US20240288627A1

    公开(公告)日:2024-08-29

    申请号:US18652219

    申请日:2024-05-01

    发明人: Tetsuya HAYASHI

    IPC分类号: G02B6/02 G02B6/028

    CPC分类号: G02B6/02042 G02B6/0288

    摘要: An MCF or the like according to the present disclosure ensures sufficient manufacturing tolerance, is excellent in mass productivity, and is also capable of suppressing degradation of splice loss. The MCF includes four cores that extend along a central axis, and a common cladding. On a cross-section, the common cladding has a circular outer periphery, the four cores are arranged at positions to be line symmetric with respect to a straight line that intersects with a central axis and that intersects with none of the four cores, and a core arrangement defined by the four cores has rotational symmetry once with central axis being a center of rotation.

    OPTICAL AMPLIFICATION DEVICE AND OPTICAL AMPLIFICATION METHOD

    公开(公告)号:US20240235684A1

    公开(公告)日:2024-07-11

    申请号:US18398461

    申请日:2023-12-28

    申请人: NEC Corporation

    发明人: Yusuke SASAKI

    IPC分类号: H04B10/291 G02B6/02 H04B10/25

    摘要: In an optical amplification device using a multicore optical fiber, it is difficult to efficiently amplify signal light. In order to solve this problem, an optical amplification device according to the present disclosure includes an optical fiber amplification unit including a plurality of amplification cores, a first connection unit being connected to one end of the optical fiber amplification unit, and a second connection unit being connected to another end of the optical fiber amplification unit, wherein the first connection unit is configured in such a way as to connect a transmission fiber including a plurality of transmission cores to the optical fiber amplification unit, and the number of the plurality of amplification cores is larger than the number of the plurality of transmission cores.

    Trench assisted multi-core optical fiber with reduced crosstalk

    公开(公告)号:US12032200B2

    公开(公告)日:2024-07-09

    申请号:US17698832

    申请日:2022-03-18

    IPC分类号: G02B6/02

    CPC分类号: G02B6/02009 G02B6/02042

    摘要: Disclosed is a multi-core optical fiber having a plurality of cores extending parallelly along a central axis of the multi-core optical fiber. Each core of the plurality of cores is up-doped with an up-dopant. The multi-core optical fiber further has a plurality of buffer layers such that each buffer layer of the plurality of buffer layers envelop a corresponding core of the plurality of cores. Each buffer layer of the plurality of buffer layers has a predefined buffer layer thickness. The multi-core optical fiber further has a plurality of trench layers such that each trench layer of the plurality of trench layers envelops a corresponding buffer layer of the plurality of buffer layers. Each trench layer of the plurality of trench layers is down-doped with a down-dopant. The multi-core optical fiber has an inter-core crosstalk of less than −30 decibel/kilometres (dB/km) at a wavelength of 1550 nanometres (nm).

    OPTICAL FIBER
    9.
    发明公开
    OPTICAL FIBER 审中-公开

    公开(公告)号:US20240192437A1

    公开(公告)日:2024-06-13

    申请号:US18582996

    申请日:2024-02-21

    发明人: Yuki SATO

    IPC分类号: G02B6/02 G02B6/028

    摘要: An optical fiber includes a core portion, a side core layer, and a cladding portion, where Δ1>ΔClad>Δ2 and 0>Δ2 are satisfied, Δ1 is 0.35% or more and 0.45% or less, Δ2 is −0.2% or more and less than 0%, 2a is 8 μm or more and 10 μm or less, 2b is 35 μm or more and 45 μm or less, and a refractive index profile of the side core layer includes a bottom portion where a refractive index is lower than that of other regions of the side core layer, and a distance of a position of lowest refractive index in the bottom portion from a center of the core portion is a+(b−a)/1.55 μm or less.