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    Tension-based methods for forming bandwidth tuned optical fibers for bi-modal optical data transmission
    61.
    发明授权
    Tension-based methods for forming bandwidth tuned optical fibers for bi-modal optical data transmission 有权

    公开(公告)号：US12151964B2

    公开(公告)日：2024-11-26

    申请号：US16936991

    申请日：2020-07-23

    Applicant: CORNING INCORPORATED

    Inventor： Xin Chen ,  Kangmei Li ,  Ming-Jun Li ,  Snigdharaj Kumar Mishra

    IPC: C03B37/025 ,  G02B6/02 ,  G02B6/028 ,  G02B6/036

    Abstract: Methods of forming a bandwidth-tuned optical fiber for short-length data transmission systems include establishing a relationship between a change Δτ in a modal delay τ, a change ΔT in a draw tension T and a change Δλ in a BM wavelength λ of light in a BM wavelength range from 840 nm and 1100 nm for a test optical fiber drawn from a preform and that supports BM operation at the BM wavelength. The methods also include drawing from either the preform or a closely related preform the bandwidth-tuned optical fiber by setting the draw tension based on the established relationships of the aforementioned parameters so that the bandwidth-tuned optical fiber has a target bandwidth greater than 2 GHz·km at a target wavelength within the BM wavelength range.

    COMPLIANT OPTICAL FIBER
    63.
    发明公开
    COMPLIANT OPTICAL FIBER 审中-公开

    公开(公告)号：US20230341619A1

    公开(公告)日：2023-10-26

    申请号：US18130987

    申请日：2023-04-05

    Applicant: CORNING INCORPORATED

    Inventor： Scott Robertson Bickham ,  Snigdharaj Kumar Mishra ,  Pushkar Tandon

    IPC: G02B6/028 ,  G02B6/44

    CPC classification number: G02B6/0288 ,  G02B6/4401

    Abstract: An optical fiber including a core region having an outer radius r1 in a range from 4.0 μm to 8.0 μm and a relative refractive index profile Δ1 with a maximum relative refractive index Δ1max in a range from 0.20% to 0.50%, a cladding region comprising a trench cladding region having a minimum relative refractive index Δ3min greater than −0.60% and less than −0.10%, and a trench volume greater than 30%-μm2 and an outer cladding region having a relative refractive index Δ4 in a range from −0.10% to 0.10%. The optical fiber also including a primary coating and a secondary coating. The optical fiber has a mode field diameter at 1310 nm of greater than 8.8 microns, a cable cutoff wavelength of less than 1260 nm, a zero dispersion wavelength between 1300 nm and 1324 nm, and low macrobend loss at 1550 nm.

    LOW MOAT VOLUME SINGLE MODE ULTRA-LOW LOSS FIBER
    64.
    发明申请
    LOW MOAT VOLUME SINGLE MODE ULTRA-LOW LOSS FIBER 有权

    公开(公告)号：US20220187531A1

    公开(公告)日：2022-06-16

    申请号：US17547672

    申请日：2021-12-10

    Applicant: CORNING INCORPORATED

    Inventor： Peter Gottfried Hebgen ,  Hazel Benton Matthews, III ,  Snigdharaj Kumar Mishra

    IPC: G02B6/028 ,  G02B6/02

    Abstract: Embodiments of the current disclosure include low moat volume single mode ultra-low loss optical fibers. In some embodiments, a single mode optical fiber includes a first core region; a second core region surrounding and directly adjacent to the first core region, wherein a volume V of the second core region is less than or equal to 14% Δμm2; a cladding region surrounding the core region; and wherein the optical fiber has a cable cutoff of less than 1260 nm, a mode field diameter at 1310 nm of 8.6 microns to 9.7 microns, a mode field diameter at 1550 nm of 9.9 microns to 11 microns, and an attenuation at 1550 nm of less than or equal to 0.17 dB/km.

    SINGLE MODE OPTICAL FIBER WITH LOW BEND LOSS AT SMALL AND LARGE BEND DIAMETERS
    67.
    发明申请
    SINGLE MODE OPTICAL FIBER WITH LOW BEND LOSS AT SMALL AND LARGE BEND DIAMETERS 有权

    公开(公告)号：US20210041623A1

    公开(公告)日：2021-02-11

    申请号：US16944485

    申请日：2020-07-31

    Applicant: CORNING INCORPORATED

    Inventor： Ming-Jun Li ,  Snigdharaj Kumar Mishra ,  Pushkar Tandon

    IPC: G02B6/036 ,  G02B6/02

    Abstract: The single mode optical fiber disclosed herein has a core, an inner cladding, a trench and an outer cladding, along with a non-glass protective coating. The refractive index profile of the optical fiber is such that the optical fiber has relatively low bend loss at both small and large bend diameters. The relative refractive indices of the inner cladding, trench and outer cladding are such that a tunneling point that arises during bending is pushed out beyond the trench and thus sufficiently far away from the core so that bending losses for both small and large radius bends are relatively small.

    Low bend loss optical fiber with a germania doped core
    69.
    发明授权
    Low bend loss optical fiber with a germania doped core 有权

    公开(公告)号：US10302857B2

    公开(公告)日：2019-05-28

    申请号：US15957414

    申请日：2018-04-19

    Applicant: Corning Incorporated

    Inventor： Dana Craig Bookbinder ,  Ming-Jun Li ,  Snigdharaj Kumar Mishra ,  Pushkar Tandon

    IPC: G02B6/02 ,  G02B6/036 ,  G02B6/028

    Abstract: A single mode optical fiber including a germania doped silica central core region having outer radius r1 and refractive index Δ1, a maximum refractive index Δ1max, and 0.32%≤Δ1max≤0.45%, and a core alpha profile (Coreα). In various embodiments, the optical fiber also contains a cladding region including: (i) a second inner cladding region or ring region surrounding the first inner cladding region; or (ii) an inner cladding region or pedestal region surrounding the germania doped silica central core region. The corresponding resultant optical fibers exhibit a 22 m cable cutoff less than or equal to 1260 nm, a macrobending loss at 1550 nm of ≤0.75 dB/turn on a 20 mm diameter mandrel, a zero dispersion wavelength, λ0, of 1300 nm≤λ0≤1324 nm, and a mode field diameter at 1310 nm of 8.2 microns≤MDF1310 nm≤9.6 microns.

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