OPTICAL CONNECTOR
    41.
    发明公开
    OPTICAL CONNECTOR 审中-公开

    公开(公告)号:US20230305223A1

    公开(公告)日:2023-09-28

    申请号:US18019193

    申请日:2020-08-05

    CPC classification number: G02B6/0288 G02B6/3825

    Abstract: An object of the present invention is to provide a simple method capable of reducing MDL after construction of a transmission path.
    An optical connector 301 is an optical connector including a multimode optical fiber 11, in which a core 20 of the multimode optical fiber 11 includes a plurality of cavities 25 along a central axis. The optical connector 301 further includes a ferrule 12 surrounding the multimode optical fiber 11 and a connector plug 13 serving as a connection with another optical connector. The shape of the optical connector 13 is a shape of a generally used SC connector, FC connector, MT connector, or the like.

    PROPAGATION MODE LOSS DIFFERENCE COMPENSATOR
    44.
    发明公开

    公开(公告)号:US20230176284A1

    公开(公告)日:2023-06-08

    申请号:US17919327

    申请日:2020-04-24

    CPC classification number: G02B6/14 G02B6/1228

    Abstract: A mode loss difference compensator of the present disclosure includes a main waveguide configured to allow propagation of N or more modes (where N is an integer of 3 or more), a first auxiliary waveguide having, at one end thereof, a first coupling portion configured to mode-convert an LP0n mode (where n is an integer of 2 or more) propagating in the main waveguide into a fundamental mode in the first auxiliary waveguide and transfer the fundamental mode from the main waveguide to the first auxiliary waveguide and having, at the other end thereof, a second coupling portion configured to mode-convert the fundamental mode propagating in the first auxiliary waveguide into the LP0n mode (where n is an integer of 2 or more) in the main waveguide and transfer the LP0n mode from the first auxiliary waveguide to the main waveguide, and a second auxiliary waveguide having, at one end thereof, a third coupling portion configured to convert a higher-order mode, other than any LP0n mode (where n is an integer of 2 or more), propagating in the main waveguide into a fundamental mode in the second auxiliary waveguide and transfer the fundamental mode from the main waveguide to the second auxiliary waveguide and having, at the other end thereof, a terminal end portion configured to eliminate the fundamental mode propagating in the second auxiliary waveguide from the second auxiliary waveguide, wherein the main waveguide includes a loss imparting portion configured to impart a loss to a fundamental mode propagating in the main waveguide between the first and second coupling portions.

    MULTI-CORE OPTICAL FIBER AND DESIGN METHOD

    公开(公告)号:US20220214496A1

    公开(公告)日:2022-07-07

    申请号:US17605758

    申请日:2020-04-06

    Abstract: An object is to provide a multi-core configuration for acquiring a random mode coupling in a case of an arbitrary core refractive index.
    A multi-core optical fiber according to the present invention is an optical fiber in which two or more core regions are arranged in a clad region having a refractive index at a minimum core interval Λ smaller than a refractive index of the cores, a configuration of the cores is that including one propagation mode, and the core configuration and the core interval are adjusted so that an inter-mode coupling coefficient between adjacent cores is within a range from 0.73 to 120 m−1.

    MULTICORE OPTICAL FIBER, METHOD OF DESIGNING MULTICORE OPTICAL FIBER, AND OPTICAL TRANSMISSION METHOD

    公开(公告)号:US20220003920A1

    公开(公告)日:2022-01-06

    申请号:US17294892

    申请日:2019-11-08

    Abstract: It is an object of the present invention to provide a multicore optical fiber, a design method for the multicore optical fiber and an optical transmission method using the multicore optical fiber including four cores having a standard cladding diameter of 125±1 μm for an existing single mode optical fiber covering several thousands of kilometers of transmission. The multicore optical fiber according to the present invention disposes two-stage claddings with different refractive indices around each core, and designates as a predetermined range, a core radius a1, a radius a2 of a first cladding region surrounding each core, specific refractive index Δ1 relative to the core of the first cladding region and a specific refractive index Δ2 relative to the core of a second cladding region including four cores and the first cladding region.

    OPTICAL FIBER DESIGN METHOD
    48.
    发明申请

    公开(公告)号:US20180341104A1

    公开(公告)日:2018-11-29

    申请号:US15771040

    申请日:2016-11-17

    Abstract: An optical fiber design method according to the present invention is a design method of a photonic crystal fiber having a plurality of holes arranged in the optical fiber along a longitudinal direction, in which a required effective cross-sectional area is calculated from a light wavelength, a transmission distance, and output power such that, in a cross section, a hole ratio which is an area of the holes per unit area is larger in a central side than in an outer side in a portion corresponding to a cladding, and a fiber structure (hole diameter and hole interval) corresponding to the effective cross-sectional area is calculated.

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