公开(公告)号：US20210347676A1

公开(公告)日：2021-11-11

申请号：US17308409

申请日：2021-05-05

Applicant: CORNING INCORPORATED

Inventor： Steven Bruce Dawes ,  Pushkar Tandon

IPC: C03B37/027 ,  C03B37/029 ,  C03B37/025

Abstract: A method of processing an optical fiber includes drawing the optical fiber from an optical fiber preform within a draw furnace, the optical fiber extending from the draw furnace along a process pathway, the optical fiber comprising at least one halogen-doped core; and drawing the optical fiber through at least one slow cooling device positioned downstream from the draw furnace at a draw speed. The at least one slow cooling device exposes the optical fiber to a slow cooling device process temperature greater than or equal to 800° C. and less than or equal to 1600° C. The draw speed is such that the optical fiber has a residence time of at least 0.1 s in the at least one slow cooling device. An optical fiber made by such a process is also disclosed.

公开(公告)号：US11149613B2

公开(公告)日：2021-10-19

申请号：US16316906

申请日：2017-07-13

Applicant: Corning Incorporated

Inventor： Rajesh Yogesh Bhargava ,  Dana Craig Bookbinder ,  Curtis Richard Cowles ,  Jacob George ,  Jason Thomas Harris ,  Seth Thomas Nickerson ,  Pushkar Tandon

IPC: F01N3/28 ,  F01N13/18

Abstract: Exhaust gas treatment articles and methods of manufacturing the same are disclosed herein. An exhaust gas treatment article includes a porous ceramic honeycomb body with multiple channel walls defining cell channels that extend in an axial direction and an outer peripheral surface that extends in the axial direction. The exhaust gas treatment article further includes a metal layer that surrounds the porous ceramic honeycomb body and that is in direct contact with at least a portion of the outer peripheral surface of the porous ceramic honeycomb body. The metal layer includes a joint. The exhaust gas treatment article includes a shim that is located under the joint and that is in direct contact with at least a portion of the outer peripheral surface of the porous ceramic honeycomb body.

公开(公告)号：US20210294027A1

公开(公告)日：2021-09-23

申请号：US17190833

申请日：2021-03-03

Applicant: CORNING INCORPORATED

Inventor： Kevin Wallace Bennett ,  Snigdharaj Kumar Mishra ,  Pushkar Tandon ,  Aramais Robert Zakharian

IPC: G02B6/02 ,  G02B6/44 ,  G02B6/028 ,  C03C25/106

Abstract: A multicore optical fiber is provided that includes a first core with silica glass doped with chlorine and/or an alkali metal, a first inner cladding surrounding the first core, and a first outer cladding surrounding the first inner cladding and having a first trench region having a volume of about 30%Δ-micron2 or greater. The multicore optical fiber also includes a second core with silica glass doped with chlorine and/or an alkali metal, a second inner cladding surrounding the second core, and a second outer cladding surrounding the second inner cladding and having a second trench region having a volume of about 30%Δ-micron2 or greater. Additionally, a common cladding surrounds the first core and the second core, and the first core and the second core each have an effective area at 1550 nm of about 100 micron2 or less.

公开(公告)号：US20210269352A1

公开(公告)日：2021-09-02

申请号：US17182812

申请日：2021-02-23

Applicant: Corning Incorporated

Inventor： Steven Akin Dunwoody ,  Robert Clark Moore ,  Pushkar Tandon

IPC: C03B37/025 ,  C03B37/027 ,  C03B37/029

Abstract: Optical fibers having low fictive temperature and methods of making such fibers are described. Management of the cooling rate of an optical fiber during fiber draw permits control over the fictive temperature of the fiber. Non-monotonic cooling rates are shown to promote reductions in fiber fictive temperature. The non-monotonic cooling includes slower cooling rates in upstream portions of the process pathway and faster cooling rates in downstream portions of the process pathway. Reduction in fiber fictive temperature is achieved by controlling the ambient temperature of the fiber to slow the cooling rate of the fiber in upstream portions of the process pathway that correspond to the fiber temperature regime in which the fiber viscosity is sufficiently low to permit efficient structural relaxation. Increases in cooling rate in downstream portions of the process pathway permit adjustment of fiber temperature as needed to meet entrance temperature requirements of downstream processing units. Lower fiber fictive temperature and lower fiber attenuation are achieved at faster draw speeds through non-monotonic cooling of fiber temperature.

公开(公告)号：US11072560B2

公开(公告)日：2021-07-27

申请号：US16100922

申请日：2018-08-10

Applicant: Corning Incorporated

Inventor： Dana Craig Bookbinder ,  Richard Michael Fiacco ,  Pushkar Tandon

IPC: C03C25/68 ,  C03B37/012 ,  C03B37/014

Abstract: A method of preparing an optical preform, comprises the steps of: positioning an optical preform comprising silica within a cavity of a furnace; passing an etchant gas into the furnace and at least one of through an open channel defined in the optical preform and around the optical preform; and passing a neutralizing gas into the cavity of the furnace, the neutralizing gas configured to neutralize the etchant gas.

公开(公告)号：US20210214266A1

公开(公告)日：2021-07-15

申请号：US17145471

申请日：2021-01-11

Applicant: CORNING INCORPORATED

Inventor： Curtis Robert Fekety ,  Richard Michael Fiacco ,  Ming-Jun Li ,  Craig Daniel Nie ,  Jeffery Scott Stone ,  Pushkar Tandon

IPC: C03B37/014 ,  G02F1/01

Abstract: Disclosed herein are methods for forming an optical fiber preform using organic silica and germania precursors. The method includes depositing soot composed of germanium dioxide and silica on a substrate, removing the substrate, conducting a dehydration step and one or more heating steps under an oxygen-containing atmosphere to form the preform. Also disclosed are optical fibers drawn from the preforms produced herein.

公开(公告)号：US20210208335A1

公开(公告)日：2021-07-08

申请号：US17141324

申请日：2021-01-05

Applicant: CORNING INCORPORATED

Inventor： Arash Abedijaberi ,  Scott Robertson Bickham ,  Darren Andrew Stainer ,  Pushkar Tandon

IPC: G02B6/02 ,  G02B6/44

Abstract: The present disclosure provides optical fibers with an impact-resistant coating system. The fibers feature low microbending and high mechanical reliability. The coating system includes a primary coating and a secondary coating. The primary coating and secondary coating have reduced thickness to provide reduced radius fibers without sacrificing protection. The primary coating has a low spring constant and sufficient thickness to resist transmission of force to the glass fiber. The secondary coating has high puncture resistance. The outer diameter of the optical fiber is less than or equal to 200 μm.

公开(公告)号：US11054573B2

公开(公告)日：2021-07-06

申请号：US16781235

申请日：2020-02-04

Applicant: CORNING INCORPORATED

Inventor： Scott Robertson Bickham ,  Pushkar Tandon ,  Ruchi Tandon

IPC: G02B6/028 ,  C03C25/1065 ,  C03C25/12 ,  G02B6/02

Abstract: The present description provides multimode optical fibers with reduced cladding thickness. The optical fibers include a reduced-diameter glass fiber and/or reduced-thickness coatings. The overall diameter of the optical fibers is less than 210 μm and examples with diameters less than 160 μm are presented. Puncture resistant secondary coatings enable thinning of the secondary coating without compromising protection of the glass fiber. The optical fibers are suitable for data center applications and features high modal bandwidth, low attenuation, low microbending sensitivity, and puncture resistance in a compact form factor.

公开(公告)号：US20210132289A1

公开(公告)日：2021-05-06

申请号：US17064108

申请日：2020-10-06

Applicant: CORNING INCORPORATED

Inventor： Ching-Kee Chien ,  Pushkar Tandon ,  Ruchi Tandon

IPC: G02B6/02 ,  C03C25/1065

Abstract: An optical fiber includes an outer diameter less than 220 μm, a glass fiber that includes a glass core and a glass cladding, a primary coating, and a secondary coating. The glass cladding surrounds and is in direct contact with the glass core. The primary coating surrounds and is in direct contact with the glass fiber. The primary coating can have a Young's modulus less than 0.5 MPa and a thickness less than 30.0 μm. The secondary coating surrounds and is in direct contact with the primary coating. The secondary coating can have a thickness less than 27.5 μm. A pullout force of the optical fiber can be less than a predetermined threshold when in an as-drawn state. The pullout force may increase by less than a factor of 2.0 upon aging the primary and secondary coatings on the glass fiber for at least 60 days.

公开(公告)号：US20210094873A1

公开(公告)日：2021-04-01

申请号：US17030605

申请日：2020-09-24

Applicant: CORNING INCORPORATED

Inventor： Dana Craig Bookbinder ,  Stephan Lvovich Logunov ,  Darren Andrew Stainer ,  Pushkar Tandon ,  Ruchi Tandon

IPC: C03C25/104 ,  C03C25/12 ,  G02B6/02 ,  C03C25/6226

Abstract: An optical fiber curing component includes a first tube comprising a first body defining a first interior surface and a first exterior surface, the first tube defining a first aperture and a second aperture on opposite ends of a first cavity, wherein the first tube defines a central axis extending through the first cavity; light sources coupled to the first body of the first tube and configured to emit light toward the central axis of the first tube, wherein each of the light sources intersect a common plane defined perpendicular to the central axis of the first tube; a silica glass article, having an anti-reflective coating, disposed between each of the plurality of light sources and the central axis of the first tube; and a reflective coating positioned on the interior surface of the first body and configured to reflect the light toward the central axis of the first tube.