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    Multimode fiber with intermediate clad layer
    1.
    发明授权
    Multimode fiber with intermediate clad layer 有权

    公开(公告)号：US09841559B2

    公开(公告)日：2017-12-12

    申请号：US15429421

    申请日：2017-02-10

    Applicant: Corning Incorporated

    Inventor： Snigdharaj Kumar Mishra ,  Oleksandr Kogan ,  Simit Mayank Patel ,  Elios Klemo ,  Daniel J Halvorson

    IPC: G02B6/028 ,  G02B6/036

    CPC classification number: G02B6/0288 ,  G02B6/03638

    Abstract: An optical fiber including a multimode core having a radius, R1, and a maximum relative refractive index, Δ1MAX, at a wavelength λ0, an inner clad layer surrounding the core and having a radial thickness, T2, and a minimum relative refractive index, Δ2MIN, of about 0.0% at a wavelength of λ0, an intermediate clad layer surrounding the inner clad layer and having a radial thickness, T3, and a maximum relative refractive index Δ3MAX and an outer clad layer surrounding the inner clad layer and having a radial thickness, T4, and a maximum relative refractive index, Δ4MIN, at a wavelength of λ0. The optical fiber satisfies the following relationship: Δ1MAX>Δ3MAX>Δ2MIN, and the optical fiber exhibits an overfilled bandwidth of greater than or equal to about 1.5 GHz-km at λ0.

    Method of manufacturing an optical fiber using axial tension control to reduce axial variations in optical properties
    2.
    发明授权
    Method of manufacturing an optical fiber using axial tension control to reduce axial variations in optical properties 有权

    公开(公告)号：US11530157B2

    公开(公告)日：2022-12-20

    申请号：US16871575

    申请日：2020-05-11

    Applicant: CORNING INCORPORATED

    Inventor： Sean Nicole DeMass ,  Simit Mayank Patel ,  Pushkar Tandon

    IPC: C03B37/025 ,  C03B37/027 ,  G02B6/036

    Abstract: A method of manufacturing a tuned optical fiber includes providing a first preform from a set of like preforms each having substantially the same refractive index profile, including amount of axial variation relative to a target refractive index profile. The method includes drawing a reference optical fiber from the first preform and measuring a variation in an optical or physical property as a function of axial position. The method also includes drawing from a second preform from the set of like preforms the tuned optical fiber. The drawing includes using a time-varying tension that reduces the amount of variation of the optical or physical property of interest. The time-varying tension is defined by an amount of axial stress imparted to the tuned fiber needed to alter the refractive index profile and the at least one optical or physical property based on a stress-optic effect.

    MULTIMODE OPTICAL FIBER CORE CANE CLASSIFICATION METHOD
    3.
    发明申请
    MULTIMODE OPTICAL FIBER CORE CANE CLASSIFICATION METHOD 有权

    公开(公告)号：US20230094509A1

    公开(公告)日：2023-03-30

    申请号：US17951695

    申请日：2022-09-23

    Applicant: CORNING INCORPORATED

    Inventor： John Steele Abbott, III ,  Scott Robertson Bickham ,  Amanda Lee Billings ,  Ian David Cook ,  Simit Mayank Patel

    IPC: G01M11/02 ,  G01M11/00 ,  B07C5/342 ,  G05B19/4155 ,  C03B37/025 ,  C03B37/027 ,  C03B37/018

    Abstract: Methods for classifying a core cane of an multimode optical fiber are disclosed. In embodiments, the method includes determining a relative refractive index profile Δ(r) of the core cane; fitting the relative refractive index profile Δ(r) to an alpha profile Δfit(r) defined by: Δ fit ( r ) = Δ o , fit ( 1 - ( r a fit ) α fit ) where Δo,fit is a relative refractive index at a longitudinal centerline of the core cane, αfit is a core shape parameter, and afit is an outer radius of the core cane; generating a non-alpha residual profile Δdiff(r)=Δ(r)−Δfit(r) for the core cane; computing one or more metrics from Δdiff(r), and using the one or metrics in a classification of the core cane, the classification comprising a prediction of whether a bandwidth at a pre-determined wavelength of an optical fiber drawn from a preform comprising the core cane exceeds a pre-determined bandwidth at the pre-determined wavelength.

    MULTIMODE FIBER WITH INTERMEDIATE CLAD LAYER
    4.
    发明申请
    MULTIMODE FIBER WITH INTERMEDIATE CLAD LAYER 有权

    公开(公告)号：US20170242186A1

    公开(公告)日：2017-08-24

    申请号：US15429421

    申请日：2017-02-10

    Applicant: Corning Incorporated

    Inventor： Snigdharaj Kumar Mishra ,  Oleksandr Kogan ,  Simit Mayank Patel ,  Elios Klemo ,  Daniel J. Halvorson

    IPC: G02B6/028 ,  G02B6/036

    CPC classification number: G02B6/0288 ,  G02B6/03638

    Abstract: An optical fiber including a multimode core having a radius, R1, and a maximum relative refractive index, Δ1MAX, at a wavelength λ0, an inner clad layer surrounding the core and having a radial thickness, T2, and a minimum relative refractive index, Δ2MIN, of about 0.0% at a wavelength of λ0, an intermediate clad layer surrounding the inner clad layer and having a radial thickness, T3, and a maximum relative refractive index Δ3MAX and an outer clad layer surrounding the inner clad layer and having a radial thickness, T4, and a maximum relative refractive index, Δ4MIN, at a wavelength of λ0. The optical fiber satisfies the following relationship: Δ1MAX>Δ3MAX>Δ2MIN, and the optical fiber exhibits an overfilled bandwidth of greater than or equal to about 1.5 GHz-km at λ0.

    METHOD OF SELECTING OPTIMIZED MULTIMODE OPTICAL FIBERS
    8.
    发明公开
    METHOD OF SELECTING OPTIMIZED MULTIMODE OPTICAL FIBERS 审中-公开

    公开(公告)号：US20240151609A1

    公开(公告)日：2024-05-09

    申请号：US18490897

    申请日：2023-10-20

    Applicant: CORNING INCORPORATED

    Inventor： Zoren Dene Bullock ,  Xin Chen ,  Hao Dong ,  Ming-Jun Li ,  Simit Mayank Patel

    IPC: G01M11/00

    CPC classification number: G01M11/30

    Abstract: A method of selecting a group of multimode optical fibers, includes comparing a first effective modal bandwidth at a first wavelength of a multimode optical fiber with a first effective modal bandwidth threshold at the first wavelength, the multimode optical fiber being in a group of multimode optical fibers meeting a first OM standard, wherein the first wavelength is from 844 nm to 863 nm; and categorizing the multimode optical fiber as passing a transmission distance requirement if the first effective modal bandwidth of the first multimode optical fiber is greater than or equal to the first effective modal bandwidth threshold; wherein the transmission distance is defined in a transceiver specification, wherein the transceiver specification is one or more of: (a) an 800G bidirectional (BiDi) transceiver specification, or (b) a 100G/lane based MM VCSEL transceiver specification, or (c) a 25Gbaud based transceiver specification, or (d) 50G PAM4 based transceiver specification.

    METHOD OF SELECTING OPTIMIZED MULTIMODE OPTICAL FIBERS
    10.
    发明申请
    METHOD OF SELECTING OPTIMIZED MULTIMODE OPTICAL FIBERS 有权

    公开(公告)号：US20230110293A1

    公开(公告)日：2023-04-13

    申请号：US17945568

    申请日：2022-09-15

    Applicant: CORNING INCORPORATED

    Inventor： Xin Chen ,  Kangmei Li ,  Ming-Jun Li ,  Simit Mayank Patel

    IPC: G01M11/02

    Abstract: A method of categorizing a group of multimode optical fibers, the method including comparing an effective modal bandwidth of a first multimode optical fiber with a first threshold, the first multimode optical fiber being in a group of multimode optical fibers meeting a first OM-standard and the first threshold being an effective modal bandwidth of the first multimode optical fiber. The method further including categorizing the first multimode optical fiber as meeting OM functional requirements of a second OM-standard if the effective modal bandwidth of the first multimode optical fiber is equal to or above the first threshold, wherein the second OM-standard is higher than the first OM-standard.

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