公开(公告)号：US11119270B2

公开(公告)日：2021-09-14

申请号：US16793063

申请日：2020-02-18

Applicant: CORNING INCORPORATED

Inventor： Scott Robertson Bickham ,  Yangbin Chen ,  Ching-Kee Chien ,  Ming-Jun Li ,  Pushkar Tandon ,  Ruchi Tandon

IPC: G02B6/028 ,  G02B6/02

Abstract: The present description provides reduced-diameter multimode optical fibers. 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：US11117124B2

公开(公告)日：2021-09-14

申请号：US16760248

申请日：2018-10-31

Applicant: Corning Incorporated

Inventor： Douglas Munroe Beall ,  Thorsten Rolf Boger ,  Dana Craig Bookbinder ,  Thomas Jean Glasson ,  Dale Robert Powers ,  Pushkar Tandon ,  Jianguo Wang ,  Huiqing Wu ,  Xinfeng Xing

IPC: B01J35/04 ,  B01D53/88 ,  C04B38/00 ,  B01D46/24 ,  C04B111/00

Abstract: A honeycomb body having a porous ceramic honeycomb structure with a first end, a second end, and a plurality of walls having wall surfaces defining a plurality of inner channels. A highly porous layer is disposed on one or more of the wall surfaces of the honeycomb body. The highly porous layer has a porosity greater than 90%, and has an average thickness of greater than or equal to 0.5 μm and less than or equal to 10 μm. A method of making a honeycomb body includes depositing a layer precursor on a ceramic honeycomb body and binding the layer precursor to the ceramic honeycomb body to form the highly porous layer.

公开(公告)号：US20210253469A1

公开(公告)日：2021-08-19

申请号：US17175000

申请日：2021-02-12

Applicant: CORNING INCORPORATED

Inventor： Bruce Warren Reding ,  Pushkar Tandon

IPC: C03B37/027

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.

公开(公告)号：US20210223469A1

公开(公告)日：2021-07-22

申请号：US17146881

申请日：2021-01-12

Applicant: CORNING INCORPORATED

Inventor： Scott Robertson Bickham ,  Ming-Jun Li ,  Snigdharaj Kumar Mishra ,  Pushkar Tandon ,  Ruchi Sarda Tandon

IPC: G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  C09D4/00 ,  C09D175/04 ,  C09D133/14

Abstract: The optical fiber disclosed has a glass fiber including a core and a cladding. The core comprises silica glass doped with chlorine and having an outer radius r1 between 3.0 microns and 10.0 microns. The cladding has an outer radius r4 not less than 50.0 microns. A primary coating surrounding the cladding has a thickness (r5−r4) between 5.0 microns and 20.0 microns, and an in situ modulus less than 0.30 MPa. A secondary coating surrounding the primary coating has a thickness (r6−r5) between 8.0 microns and 30.0 microns, a Young's modulus greater than 1500 MPa, and a normalized puncture load greater than 3.6×10−3 g/micron2. The optical fiber has a 22-meter cable cutoff wavelength less than 1530 nm, an attenuation at 1550 nm of less than 0.17 dB/km, and a bending loss at 1550 nm of less than 3.0 dB/turn.

公开(公告)号：US11036000B2

公开(公告)日：2021-06-15

申请号：US16716912

申请日：2019-12-17

Applicant: CORNING INCORPORATED

Inventor： Scott Robertson Bickham ,  Ming-Jun Li ,  Pushkar Tandon ,  Ruchi Tandon

IPC: G02B6/02 ,  G02B6/036 ,  C03C25/1065 ,  C03C25/50 ,  G02B6/028

Abstract: The present disclosure provides optical fibers with an impact-resistant coating system. The fibers feature low attenuation. The coating system includes a primary coating and a secondary coating. The primary coating and secondary coating have reduced thickness to provide low-diameter fibers without sacrificing protection. The primary coating has high tear strength and is resistant to damage caused by mechanical force. The secondary coating has high puncture resistance. The outer diameter of the optical fiber is less than or equal to 190 μm.

公开(公告)号：US11022750B2

公开(公告)日：2021-06-01

申请号：US16561394

申请日：2019-09-05

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

公开(公告)号：US10947149B2

公开(公告)日：2021-03-16

申请号：US16167830

申请日：2018-10-23

Applicant: Corning Incorporated

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

IPC: C03B37/014 ,  C03B19/14 ,  C03C13/04 ,  C03C3/06 ,  G02B6/02 ,  C03B37/018

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. The sintering includes a high pressure sintering treatment and a low pressure sintering treatment. The high pressure sintering treatment is conducted in the presence of a high partial pressure of a gas-phase halogen doping precursor and densifies a silica soot body to a partially consolidated state. The low pressure sintering treatment is conducted in the presence of a low partial pressure of gas-phase halogen doping precursor and transforms a partially consolidated silica body to a closed-pore state. The product halogen-doped silica glass exhibits little foaming when heated to form fibers in a draw process or core canes in a redraw process.

公开(公告)号：US20210072462A1

公开(公告)日：2021-03-11

申请号：US17010169

申请日：2020-09-02

Applicant: CORNING INCORPORATED

Inventor： Dong Gui ,  Pushkar Tandon ,  Qijun Xiao

IPC: G02B6/26 ,  C03C13/04 ,  G02B6/02 ,  G02B6/42

Abstract: An optical system comprising: an optical assembly having a first optical surface and a rear optical surface, said optical assembly comprising at least three optical elements; an optical fiber comprising a core portion with a mode field diameter (MFD) expanded region optically coupled to the rear optical surface of the optical assembly, the optical fiber comprising a core region doped with chlorine in a concentration greater than 0.5 wt %, wherein the MFD expanded region is less than 5 cm in length, and has MFD at the fiber end coupled to the optical assembly that is a least 20% greater than the MFD at other end of the optical fiber; an optical signal source coupled to first optical surface of the optical assembly, such that the optical signal provided by the optical signal source is routed along an optical path formed by the optical assembly to the mode field diameter expanded region of said optical fiber.

公开(公告)号：US20210032160A1

公开(公告)日：2021-02-04

申请号：US16930723

申请日：2020-07-16

Applicant: CORNING INCORPORATED

Inventor： Dana Craig Bookbinder ,  Pushkar Tandon ,  Ruchi Tandon

IPC: C03C25/20 ,  C03C13/04 ,  C03B37/027 ,  C03B37/03 ,  C03C25/1065 ,  C03C25/285

Abstract: An optical fiber draw system and method of coating an optical fiber. The system includes a furnace for heating an optical fiber preform, a draw assembly for drawing the optical fiber at a draw speed greater than 50 meters per second, a first coating applicator for applying a first coating onto the fiber, and a first curing assembly comprising a first plurality of light sources comprising light-emitting diodes for partially curing the first coating. The optical fiber draw system also includes a second coating applicator for applying a second coating onto the fiber on top of the first coating, and a second curing system comprising a second plurality of light sources for curing the second coating, wherein the first coating is further cured in the range of 15-50 percent after leaving the first curing assembly.

公开(公告)号：US10882782B2

公开(公告)日：2021-01-05

申请号：US15868029

申请日：2018-01-11

Applicant: Corning Incorporated

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

IPC: C03B25/12 ,  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.