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    Optical fiber forming apparatus
    12.
    发明授权
    Optical fiber forming apparatus 有权

    公开(公告)号：US11827555B2

    公开(公告)日：2023-11-28

    申请号：US17319811

    申请日：2021-05-13

    Applicant: CORNING INCORPORATED

    Inventor： Erling Richard Anderson ,  Tammy Michelle Hoffmann ,  Nikolaos Pantelis Kladias ,  Robert Clark Moore ,  Christopher Scott Thomas

    IPC: C03B37/029

    CPC classification number: C03B37/029 ,  C03B2205/62

    Abstract: An optical fiber forming apparatus comprises: a draw furnace comprising: (i) a muffle with an inner surface, (ii) an axial opening below the muffle, the inner surface of the muffle defining a passageway extending through the axial opening, and (iii) an upper inlet into the passageway; and a tube that extends into the passageway of the draw furnace above the axial opening, the tube having (i) an outer surface and the inner surface of the muffle surrounds the outer surface of the tube with a space separating the outer surface of the tube from the inner surface of the muffle, (ii) an inner surface that defines a second passageway extending through the tube, (iii) an inlet into the second passageway of the tube, (iii) an outlet out of the second passageway of the tube.

    METHODS AND SYSTEMS FOR PROCESSING OPTICAL FIBER
    14.
    发明申请
    METHODS AND SYSTEMS FOR PROCESSING OPTICAL FIBER 有权

    公开(公告)号：US20210179477A1

    公开(公告)日：2021-06-17

    申请号：US17111168

    申请日：2020-12-03

    Applicant: CORNING INCORPORATED

    Inventor： Steven Akin Dunwoody ,  Nikolaos Pantelis Kladias ,  Robert Clark Moore ,  Jason Roy Pace ,  Christopher Scott Thomas ,  Bryan William Wakefield ,  Chunfeng Zhou

    IPC: C03B37/027 ,  C03B37/029

    Abstract: A system for processing optical fiber includes a draw furnace, a fiber conveyance pathway extending between an upstream end positioned at the draw furnace and a downstream end positioned opposite the upstream end, where optical fiber is conveyed along the fiber conveyance pathway from the upstream end to the downstream end in a fiber conveyance direction, a muffle in communication with the draw furnace and positioned downstream of the draw furnace, a second cooling device annularly surrounding the fiber conveyance pathway downstream from the draw furnace, the second cooling device including one or more second cooling device heating elements and a first cooling device positioned between the draw furnace and the second cooling device, wherein the first cooling device directs a fluid to contact the optical fiber.

    METHOD OF APPLYING COATING LIQUID TO AN OPTICAL FIBER
    15.
    发明申请
    METHOD OF APPLYING COATING LIQUID TO AN OPTICAL FIBER 有权

    公开(公告)号：US20210086225A1

    公开(公告)日：2021-03-25

    申请号：US17106761

    申请日：2020-11-30

    Applicant: Corning Incorporated

    Inventor： Robert Clark Moore ,  Douglas Gregg Neilson ,  Johnnie Edward Watson

    IPC: B05D1/18 ,  B05D3/06 ,  G02B6/02 ,  B05C11/10 ,  B05C3/12 ,  C03C25/106 ,  C03C25/1065 ,  C03C25/18 ,  C03C25/12 ,  B05C3/172

    Abstract: A method of applying a coating liquid to an optical fiber is described. An optical fiber is drawn through a guide die into a pressurized coating chamber and through the pressurized coating chamber to a sizing die. The pressurized coating chamber contains a coating liquid. The method includes directing coating liquid in a direction transverse to the processing pathway of the optical fiber in the pressurized coating chamber. The transverse flow of coating liquid counteracts detrimental effects associated with gyres that form in the pressurized coating chamber during the draw process. Benefits of the transverse flow include removal of bubbles, reduction in the temperature of the gyre, improved wetting, homogenization of the properties of the coating liquid in the pressurized coating chamber, and stabilization of the meniscus.

    VACUUM SLOW COOLING DEVICE FOR OPTICAL FIBER DRAW
    18.
    发明申请
    VACUUM SLOW COOLING DEVICE FOR OPTICAL FIBER DRAW 有权

    公开(公告)号：US20210340052A1

    公开(公告)日：2021-11-04

    申请号：US17376284

    申请日：2021-07-15

    Applicant: CORNING INCORPORATED

    Inventor： Yacob Mesfin Argaw ,  Nikolaos Pantelis Kladias ,  Robert Clark Moore ,  Bruce Warren Reding ,  Chunfeng Zhou

    IPC: C03B37/027

    Abstract: A method of processing an optical fiber includes drawing the optical fiber from a heated glass source, reheating the optical fiber, and cooling the optical fiber under vacuum at a cooling rate less than the cooling rate of the optical fiber in air at 25° C. and 1 atm. Cooling the optical fiber under vacuum is conducted after reheating the optical fiber. Cooling the optical fiber under vacuum reduces the rate of heat transfer from the optical fiber, which may enable further relaxation of the glass and reduction in the fictive temperature of the optical fiber. A system for processing an optical fiber includes a furnace containing a fiber preform, a first positioner, a reheating device, and a treatment device downstream of the reheating device, the treatment device operable to cool the optical fiber under vacuum to reduce the rate of heat transfer from the optical fiber.

    OPTICAL FIBER COATING DIE WITH REDUCED WETTED LENGTH
    19.
    发明申请
    OPTICAL FIBER COATING DIE WITH REDUCED WETTED LENGTH 有权

    公开(公告)号：US20210087108A1

    公开(公告)日：2021-03-25

    申请号：US17112192

    申请日：2020-12-04

    Applicant: Corning Incorporated

    Inventor： Sumitava De ,  Robert Clark Moore ,  Douglas Gregg Neilson ,  Pushkar Tandon

    IPC: C03C25/105 ,  C03C25/18

    Abstract: An optical fiber coating apparatus that provides increased gyre stability and reduced gyre strength, thereby providing a more reliable coating application process during fiber drawing includes a cone-only coating die having a conical entrance portion with a tapered wall angled at a half angle α, wherein 2°≤α≤25°, and a cone height L1 less than 2.2 mm, and a cylindrical portion having an inner diameter of d2, wherein 0.1 mm≤d2≤0.5 mm and a cylindrical height of L2, wherein 0.05 mm≤L2≤1.25 mm; a guide die having an optical fiber exit, the guide die disposed adjacent the cone-only coating die such that a wetted length (L5) between the optical fiber exit of the guide die and the entrance of the cone-only coating die is from 1 mm to 5 mm; and a holder for holding the cone-only coating die and the guide die in a fixed relationship defining a coating chamber between the guide die and the cone-only coating die, the coating chamber having an inner radius L6 from the optical fiber axis to an inner wall of the holder that is from 3 mm to 10 mm.

    OPTICAL FIBER COATING DIE WITH REDUCED WETTED LENGTH
    20.
    发明申请
    OPTICAL FIBER COATING DIE WITH REDUCED WETTED LENGTH 有权

    公开(公告)号：US20210087107A1

    公开(公告)日：2021-03-25

    申请号：US17112166

    申请日：2020-12-04

    Applicant: Corning Incorporated

    Inventor： Sumitava De ,  Robert Clark Moore ,  Douglas Gregg Neilson ,  Pushkar Tandon

    IPC: C03C25/105 ,  C03C25/18

    Abstract: An optical fiber coating apparatus that provides increased gyre stability and reduced gyre strength, thereby providing a more reliable coating application process during fiber drawing includes a cone-only coating die having a conical entrance portion with a tapered wall angled at a half angle α, wherein 2°≤α≤25°, and a cone height L1 less than 2.2 mm, and a cylindrical portion having an inner diameter of d2, wherein 0.1 mm≤d2≤0.5 mm and a cylindrical height of L2, wherein 0.05 mm≤L2≤1.25 mm; a guide die having an optical fiber exit, the guide die disposed adjacent the cone-only coating die such that a wetted length (L5) between the optical fiber exit of the guide die and the entrance of the cone-only coating die is from 1 mm to 5 mm; and a holder for holding the cone-only coating die and the guide die in a fixed relationship defining a coating chamber between the guide die and the cone-only coating die, the coating chamber having an inner radius L6 from the optical fiber axis to an inner wall of the holder that is from 3 mm to 10 mm.

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