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    METHOD FOR MANUFACTURING LOW LOSS OPTICAL FIBERS
    11.
    发明公开
    METHOD FOR MANUFACTURING LOW LOSS OPTICAL FIBERS 审中-公开

    公开(公告)号：US20230168428A1

    公开(公告)日：2023-06-01

    申请号：US17989988

    申请日：2022-11-18

    Applicant: CORNING INCORPORATED

    Inventor： Rostislav Radiyevich Khrapko ,  Hazel Benton Matthews, III ,  Pushkar Tandon

    IPC: G02B6/02 ,  G02B6/028 ,  C03B37/012

    CPC classification number: G02B6/02123 ,  G02B6/0286 ,  C03B37/0122 ,  C03B37/01217 ,  C03B2201/12 ,  C03B2201/06

    Abstract: An optical fiber includes a core region of silica glass doped with an alkali metal oxide. A depressed-index cladding region surrounds the core region and comprises silica glass doped with a first concentration of fluorine. The depressed-index cladding region has a minimum relative refractive index Δ3min in a range from −0.80% to −0.30%. An outer cladding region comprises silica glass doped with a second, lesser concentration. The outer cladding region has a relative refractive index Δ4, where Δ4−Δ3min>0.05%. The optical fiber has a time-to-peak hydrogen aging value at 23° C. of less than 100 hours upon exposure to an atmosphere having a total pressure of 1 atm and containing a partial pressure of 0.01 atm H2 and a partial pressure of 0.99 atm N2. The optical fiber exhibits an attenuation

    HONEYCOMB FILTER BODIES AND PARTICULATE FILTERS COMPRISING HONEYCOMB FILTER BODIES
    15.
    发明申请
    HONEYCOMB FILTER BODIES AND PARTICULATE FILTERS COMPRISING HONEYCOMB FILTER BODIES 有权

    公开(公告)号：US20220325644A1

    公开(公告)日：2022-10-13

    申请号：US17608778

    申请日：2020-05-01

    Applicant: CORNING INCORPORATED

    Inventor： Pushkar Tandon

    IPC: F01N3/022

    Abstract: A honeycomb filter body comprises: a clean filter pressure drop of (P1) and a clean filtration efficiency of (FE1); a porous ceramic honeycomb body comprising a first end, a second end, and a plurality of walls having wall surfaces defining a plurality of inner channels, the porous ceramic honeycomb body comprising a base clean filter pressure drop (P0) and a base clean filtration efficiency (FE0); and a porous inorganic layer disposed on one or more of the wall surfaces of the porous ceramic honeycomb body.

    Optical fiber coating die with reduced wetted length
    17.
    发明授权
    Optical fiber coating die with reduced wetted length 有权

    公开(公告)号：US11440839B2

    公开(公告)日：2022-09-13

    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: C03C25/18 ,  C03C25/105

    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.

    Wideband multimode co-doped optical fiber employing GeO2 and Al2O3 dopants
    18.
    发明授权
    Wideband multimode co-doped optical fiber employing GeO2 and Al2O3 dopants 有权

    公开(公告)号：US11287568B2

    公开(公告)日：2022-03-29

    申请号：US17239923

    申请日：2021-04-26

    Applicant: CORNING INCORPORATED

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

    IPC: G02B6/028 ,  G02B6/036 ,  C03C13/04

    Abstract: The wideband multimode co-doped optical fiber has a silica core co-doped with GeO2 and Al2O3. The GeO2 concentration is maximum at the fiber centerline and monotonically decreases radially out to the core radius. The Al2O3 concentration is minimum at the centerline and monotonically increases radially out to maximum concentration at the core radius. The cladding has an inner cladding region of relative refractive index Δ2, an intermediate cladding region having a relative refractive index Δ3, and an outer cladding region having a relative refractive index Δ4, wherein Δ3

    SINGLE MODE OPTICAL FIBERS WITH LOW CUTOFF WAVELENGTH HIGH MECHANICAL RELIABILITY
    20.
    发明申请
    SINGLE MODE OPTICAL FIBERS WITH LOW CUTOFF WAVELENGTH HIGH MECHANICAL RELIABILITY 有权

    公开(公告)号：US20210356655A1

    公开(公告)日：2021-11-18

    申请号：US17308395

    申请日：2021-05-05

    Applicant: CORNING INCORPORATED

    Inventor： Kevin Wallace Bennett ,  Scott Robertson Bickham ,  Ming-Jun Li ,  Pushkar Tandon

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

    Abstract: The optical fibers disclosed is a single mode optical fiber having a core region and a cladding region surrounding and directly adjacent to the core region. The core region can have a radius r1 in a range from 3.0 microns to 6.0 microns and a core volume V1 less than 6.0%-micron2. The cladding region can include a first outer cladding region and a second outer cladding region surrounding and directly adjacent to the first outer cladding region. The first outer cladding region can have a radius r4a, the second outer cladding region can have a radius r4b less than or equal to 65 microns and comprising silica based glass doped with titania. The disclosed single mode optical fiber can have a fiber cutoff wavelength λCF less than 1530 nm.

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