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    HALOGEN CO-DOPED OPTICAL FIBERS
    82.
    发明申请
    HALOGEN CO-DOPED OPTICAL FIBERS 审中-公开

    公开(公告)号：US20200049881A1

    公开(公告)日：2020-02-13

    申请号：US16529179

    申请日：2019-08-01

    Applicant: CORNING INCORPORATED

    Inventor： Dana Craig Bookbinder ,  Steven Bruce Dawes ,  Phong Diep ,  Brian Lee Harper ,  Pushkar Tandon

    IPC: G02B6/028 ,  G02B6/036 ,  C03B37/014

    Abstract: A method of forming an optical fiber, including: exposing a soot core preform to a dopant gas at a pressure of from 1.5 atm to 40 atm, the soot core preform comprising silica, the dopant gas comprising a first halogen doping precursor and a second halogen doping precursor, the first halogen doping precursor doping the soot core preform with a first halogen dopant and the second halogen precursor doping the soot core preform with a second halogen dopant; and sintering the soot core preform to form a halogen-doped closed-pore body, the halogen-doped closed-pore body having a combined concentration of the first halogen dopant and the second halogen dopant of at least 2.0 wt %.

    HALOGEN-DOPED SILICA PREFORMS FOR OPTICAL FIBERS
    83.
    发明申请
    HALOGEN-DOPED SILICA PREFORMS FOR OPTICAL FIBERS 审中-公开

    公开(公告)号：US20200048136A1

    公开(公告)日：2020-02-13

    申请号：US16529123

    申请日：2019-08-01

    Applicant: CORNING INCORPORATED

    Inventor： Dana Craig Bookbinder ,  Steven Bruce Dawes ,  Richard Michael Fiacco ,  Brian Lee Harper ,  Pushkar Tandon

    IPC: C03B37/014 ,  C03C3/06

    Abstract: Preparation of halogen-doped silica is described. The preparation includes doping silica with high halogen concentration and sintering halogen-doped silica to a closed-pore state in a gas-phase environment that has a low partial pressure of impermeable gases. Impermeable gases are difficult to remove from halogen-doped fiber preforms and lead to defects in optical fibers drawn from the preforms. A low partial pressure of impermeable gases in the sintering environment leads to a low concentration of impermeable gases and a low density of gas-phase voids in densified halogen-doped silica. Preforms with fewer defects result.

    LOW ATTENUATION OPTICAL FIBER
    86.
    发明申请
    LOW ATTENUATION OPTICAL FIBER 审中-公开

    公开(公告)号：US20190256400A1

    公开(公告)日：2019-08-22

    申请号：US16400617

    申请日：2019-05-01

    Applicant: Corning Incorporated

    Inventor： Dana Craig Bookbinder ,  Ming-Jun Li ,  Bruce Warren Reding ,  Pushkar Tandon

    IPC: C03B37/035 ,  C03B37/03 ,  C03B37/025 ,  C03B37/027

    Abstract: An optical fiber with low attenuation is provided. The fiber is produced under conditions that reduce fictive temperature. Processing includes maintaining the fiber at temperatures at or near the glass transition temperature (Tg) for an extended period of time. For silica-based fibers, the preferred temperatures are temperatures between 1000° C. and 1700° C. The extended residence times are achieved in a continuous fiber manufacturing process by increasing the path length of the fiber through a processing region maintained at temperatures between 1000° C. and 1700° C. The increased path length is achieved by including one or more fluid bearing devices in the processing region. The extended residence time in the processing region allows the structure of the glass fiber to relax more completely and to more closely approach the equilibrium state. The more relaxed glass structure leads to a lower fictive temperature and provides fibers with lower attenuation.

    Low bend loss optical fiber with a germania doped core
    88.
    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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