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    Honeycomb filter bodies and particulate filters comprising honeycomb filter bodies
    1.
    发明授权
    Honeycomb filter bodies and particulate filters comprising honeycomb filter bodies 有权

    公开(公告)号：US12134059B2

    公开(公告)日：2024-11-05

    申请号：US17608778

    申请日：2020-05-01

    Applicant: CORNING INCORPORATED

    Inventor： Pushkar Tandon

    IPC: B01D46/24 ,  C04B38/00 ,  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.

    TITANIA-SILICA GLASS WITH UNIFORM HYDROXYL CONCENTRATION
    4.
    发明公开
    TITANIA-SILICA GLASS WITH UNIFORM HYDROXYL CONCENTRATION 审中-公开

    公开(公告)号：US20240246850A1

    公开(公告)日：2024-07-25

    申请号：US18411231

    申请日：2024-01-12

    Applicant: CORNING INCORPORATED

    Inventor： Michael John Campion ,  Sergey Nikolaevich Shubin ,  Pushkar Tandon

    IPC: C03B19/14

    CPC classification number: C03B19/1453 ,  C03B2201/075

    Abstract: A process of forming a titania-silica glass body, the process including exposing a titania-doped silica soot body to a first thermal treatment by heating the body to a first temperature T1 between about 800° C. and about 1100° C. for a first time duration t1 calculated using the equation:






    t
    ⁢
    1

    >


    L
    c
    2


    4
    ⁢
    α



    ,




    wherein Lc is the characteristic length (cm) of the body and α is the thermal diffusivity (cm2/sec) of the body. The process further including exposing the body to a second thermal treatment by heating the body to a second temperature T2 between about 1050° C. and about 1250° C. wherein, after the second thermal treatment, a peak-to-valley difference of hydroxyl concentration amongst a plurality of segments of the body is about 70 ppm or less.

    UNCOUPLED MULTICORE OPTICAL FIBER WITH ALKALI DOPED, OFF-SET TRENCH CORES
    5.
    发明公开
    UNCOUPLED MULTICORE OPTICAL FIBER WITH ALKALI DOPED, OFF-SET TRENCH CORES 审中-公开

    公开(公告)号：US20240053531A1

    公开(公告)日：2024-02-15

    申请号：US18358162

    申请日：2023-07-25

    Applicant: CORNING INCORPORATED

    Inventor： Pushkar Tandon ,  Aramais Robert Zakharian

    IPC: G02B6/02 ,  G02B6/028

    CPC classification number: G02B6/02042 ,  G02B6/02019 ,  G02B6/0288

    Abstract: Embodiments of current disclosure include a multicore optical fiber including a common-cladding region having a refractive index Δcc and an outer radius RCC; and at least two core portions disposed within the common-cladding region, wherein each core portion includes a central axis, a core region extending from the central axis to an outer radius ri, wherein each of the at least two core portions is doped with a dopant from a group including sodium, potassium, rubidium or combination thereof, an inner-cladding region encircling and directly contacting the core region and extending from the outer radius r1 to an outer radius r2, a trench region encircling and directly contacting the inner cladding region and extending from the outer radius r2 to an outer radius r3, the trench region having a trench volume greater than or equal to 20% Δ micron2 and less than or equal to 60% Δ micron2.

    COMPLIANT OPTICAL FIBER HAVING UPDOPED OUTER CLADDING
    6.
    发明公开
    COMPLIANT OPTICAL FIBER HAVING UPDOPED OUTER CLADDING 审中-公开

    公开(公告)号：US20230417984A1

    公开(公告)日：2023-12-28

    申请号：US18211675

    申请日：2023-06-20

    Applicant: CORNING INCORPORATED

    Inventor： Snigdharaj Kumar Mishra ,  Pushkar Tandon

    IPC: G02B6/036 ,  G02B6/02

    CPC classification number: G02B6/03627 ,  G02B6/02004 ,  G02B6/02104 ,  G02B6/02333

    Abstract: An optical fiber includes a core region having a relative refractive index profile Δ1 with a maximum relative refractive index Δ1max in a range from 0.20% to 0.50%, and a surrounding cladding region that includes a triangular trench cladding region and an outer cladding region, and a relative refractive index Δ3 with a minimum relative refractive index Δ3min greater than −0.60% and less than 0.00%, and a trench volume greater than 30% μm2. The outer cladding region has a relative refractive index Δ4 in a range from 0.01% to 0.06% and a chlorine concentration greater than 1500 ppm. The optical fiber has a mode field diameter at 1310 nm of greater than 9.0 microns, a cable cutoff wavelength of less than 1260 nm, a zero dispersion wavelength between 1300 nm and 1324 nm, and low macrobend loss.

    OPTICAL FIBER WITH INVERSE TRIANGULAR TRENCH DESIGN
    7.
    发明公开
    OPTICAL FIBER WITH INVERSE TRIANGULAR TRENCH DESIGN 审中-公开

    公开(公告)号：US20230266525A1

    公开(公告)日：2023-08-24

    申请号：US18137808

    申请日：2023-04-21

    Applicant: CORNING INCORPORATED

    Inventor： Ming-Jun Li ,  Pushkar Tandon

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

    CPC classification number: G02B6/0286 ,  G02B6/02009 ,  G02B6/0281 ,  G02B6/0283 ,  G02B6/03622 ,  G02B6/0365 ,  G02B6/02347 ,  G02B6/4403

    Abstract: A single mode optical fiber is provided that includes a core region having an outer radius r1 and a maximum relative refractive index Δ1max. The single mode optical fiber further includes a cladding region surrounding the core region, the cladding region includes a depressed-index cladding region, a relative refractive index Δ3 of the depressed-index cladding region increasing with increased radial position. The single mode optical fiber has a bend loss at 1550 nm for a 15 mm diameter mandrel of less than about 0.75 dB/turn, a bend loss at 1550 nm for a 20 mm diameter mandrel of less than about 0.2 dB/turn, and a bend loss at 1550 nm for a 30 mm diameter mandrel of less than 0.005 dB/turn. Additionally, the single mode optical fiber has a mode field diameter of 9.0 microns or greater at 1310 nm wavelength.

    Multicore optical fiber
    9.
    发明授权
    Multicore optical fiber 有权

    公开(公告)号：US11726257B2

    公开(公告)日：2023-08-15

    申请号：US17670941

    申请日：2022-02-14

    Applicant: CORNING INCORPORATED

    Inventor： Kevin Wallace Bennett ,  Pushkar Tandon

    IPC: G02B6/02

    CPC classification number: G02B6/02042 ,  G02B6/02395

    Abstract: A multicore optical fiber includes an inner glass region having a plurality of core regions surrounded by a common outer cladding, the inner glass region further having at least one marker and an outer diameter in the range of 120 microns and 130 microns, wherein each core region is comprised of a germania-doped silica core and a fluorine-doped silica trench, wherein the trench volume of the fluorine-doped silica trench is greater than 50% Δ microns2. The fiber has an outer coating layer surrounding the inner glass region, the outer coating layer having a primary coating layer and a secondary coating layer with a diameter of the secondary coating layer equal to or less than 200 microns, wherein each core region has a mode field diameter greater than 8.2 microns at 1310 nm, a cable cutoff wavelength of less than 1260 nm, and zero dispersion wavelength of less than 1335 nm.

    SYSTEMS AND METHODS FOR PROCESSING OPTICAL FIBER
    10.
    发明公开
    SYSTEMS AND METHODS FOR PROCESSING OPTICAL FIBER 审中-公开

    公开(公告)号：US20230234879A1

    公开(公告)日：2023-07-27

    申请号：US18099719

    申请日：2023-01-20

    Applicant: CORNING INCORPORATED

    Inventor： Bruce Warren Reding ,  Pushkar Tandon

    IPC: C03B37/027

    CPC classification number: C03B37/02736 ,  C03B37/02718

    Abstract: A system for processing an optical fiber includes: a draw furnace, said draw furnace containing an optical fiber preform; a bare optical fiber drawn from said optical fiber preform, said bare optical fiber extending from said draw furnace along a process pathway; and a slow cooling device operatively coupled to and downstream from said draw furnace, said slow cooling device exposing said bare optical fiber to a slow cooling device process temperature in the range from 1000° C. to 1400° C., wherein the bare optical fiber passes through the slow cooling device at least two times.

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