公开(公告)号：US11554981B2

公开(公告)日：2023-01-17

申请号：US16890037

申请日：2020-06-02

Applicant: CORNING INCORPORATED

Inventor： Randy Allan Binko ,  Steven Bruce Dawes ,  Nikolay Anatolyevich Panin ,  Bradley Kent Shepard

IPC: C03B37/07 ,  C03B37/014

Abstract: Apparatuses and methods for processing optical fiber preforms are disclosed. According to one aspect, an apparatus generally includes a furnace body and a muffle disposed within the furnace body. A space between the muffle and the furnace body defines a first interior volume. The muffle defines a second interior volume sealed from the first interior volume. An annulus gas is supplied to the first interior volume and a process gas is supplied to the second interior volume. A differential pressure gauge is coupled to the interior volumes. A flow controller is coupled to at least one of the gas sources and to the differential pressure gauge. The flow controller receives a differential pressure signal from the differential pressure gauge and adjusts a flow of a gas such that the pressure differential between the first interior volume and the second interior volume is minimized.

公开(公告)号：US20210355020A1

公开(公告)日：2021-11-18

申请号：US17391121

申请日：2021-08-02

Applicant: Corning Incorporated

Inventor： Steven Bruce Dawes ,  Lisa Ann Hogue ,  Kenneth Edward Hrdina ,  Srinivas Vemury

IPC: C03C3/06 ,  C03B19/06 ,  C03B37/012 ,  C03B37/018

Abstract: A method for forming an optical quality glass is provided. The method includes contacting silica soot particles with a basic additive, forming a silica soot compact, and removing the basic additive from the silica soot compact. A method of forming a cladding portion of an optical fiber preform is also provided.

公开(公告)号：US11150403B2

公开(公告)日：2021-10-19

申请号：US16839806

申请日：2020-04-03

Applicant: CORNING INCORPORATED

Inventor： Dana Craig Bookbinder ,  Steven Bruce Dawes ,  Inna Igorevna Kouzmina ,  Ming-Jun Li ,  Manuela Ocampo ,  Pushkar Tandon

IPC: G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  C08F222/10

Abstract: Small-radius coated optical fibers having large mode field diameter and low bending losses. The coated fiber may have an outer radius of 110 μm or less, while providing a mode field diameter of 9.0 μm or greater and a bending loss when wrapped about a 15 mm mandrel of 0.5 dB/km or less at wavelength of 1550 nm. The coated fiber may have a mode field diameter of 9.2 μm or greater and may have a bending loss at 1550 nm of 0.25 dB/km or less when wrapped about a 20 mm mandrel or a bending loss at 1550 nm of 0.02 dB/km or less when wrapped about a 30 mm mandrel.

公开(公告)号：US20210179478A1

公开(公告)日：2021-06-17

申请号：US17114982

申请日：2020-12-08

Applicant: CORNING INCORPORATED

Inventor： Arash Abedijaberi ,  Elena Alekseevna Chizhova-Notkina ,  Steven Bruce Dawes ,  Nikolay Anatolyevich Panin

IPC: C03B37/027 ,  C03B37/029

Abstract: Apparatuses and methods for processing an optical fiber preform are disclosed. According to one aspect, an apparatus may generally include a muffle defining an interior volume enclosed by at least one sidewall and a handle assembly for supporting the optical fiber preform in the muffle. The handle assembly may be removably coupled to the muffle and extend into the interior volume. At least one baffle may be positioned in the interior volume and define an upper portion of the interior volume and a lower portion of the interior volume. The at least one baffle may define at least one flow channel between the upper portion of the interior volume and the lower portion of the interior volume.

公开(公告)号：US10884184B2

公开(公告)日：2021-01-05

申请号：US15378356

申请日：2016-12-14

Applicant: Corning Incorporated

Inventor： George Edward Berkey ,  Steven Bruce Dawes

IPC: G02B6/02 ,  G02B6/036 ,  C03C13/04 ,  C03B19/14 ,  C03C3/06 ,  C03B32/00 ,  C03B37/014 ,  C03B37/025

Abstract: Bromine doping of silica glass is demonstrated. Bromine doping can be achieved with SiBr4 as a precursor. Bromine doping can occur during heating, consolidation or sintering of a porous silica glass body. Doping concentrations of bromine increase with increasing pressure of the doping precursor and can be modeled with a power law equation in which doping concentration is proportional to the square root of the pressure of the doping precursor. Bromine is an updopant in silica and the relative refractive index of silica increases approximately linearly with doping concentration. Bromine can be used as a dopant for optical fibers and can be incorporated in the core and/or cladding regions. Core doping concentrations of bromine are sufficient to permit use of undoped silica as an inner cladding material in fibers having a trench in the refractive index profile. Co-doping of silica glass with bromine and chlorine is also demonstrated.

公开(公告)号：US20200284976A1

公开(公告)日：2020-09-10

申请号：US16839806

申请日：2020-04-03

Applicant: CORNING INCORPORATED

Inventor： Dana Craig Bookbinder ,  Steven Bruce Dawes ,  Inna Igorevna Kouzmina ,  Ming-Jun Li ,  Manuela Ocampo ,  Pushkar Tandon

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

Abstract: Small-radius coated optical fibers having large mode field diameter and low bending losses. The coated fiber may have an outer radius of 110 μm or less, while providing a mode field diameter of 9.0 μm or greater and a bending loss when wrapped about a 15 mm mandrel of 0.5 dB/km or less at wavelength of 1550 nm. The coated fiber may have a mode field diameter of 9.2 μm or greater and may have a bending loss at 1550 nm of 0.25 dB/km or less when wrapped about a 20 mm mandrel or a bending loss at 1550 nm of 0.02 dB/km or less when wrapped about a 30 mm mandrel.

公开(公告)号：US10571628B2

公开(公告)日：2020-02-25

申请号：US16193819

申请日：2018-11-16

Applicant: Corning Incorporated

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

IPC: G02B6/028 ,  G02B6/036

Abstract: A co-doped optical fiber is provided having an attenuation of less than about 0.17 dB/km at a wavelength of 1550 nm. The fiber includes a core in the fiber having a graded refractive index profile with an alpha of greater than 5. The fiber also includes a cladding in the fiber that surrounds the core addition, the core includes silica that is co-doped with two or more halogens.

公开(公告)号：US20200049881A1

公开(公告)日：2020-02-13

申请号：US16529179

申请日：2019-08-01

Applicant: CORNING INCORPORATED

Inventor： Dana Craig Bookbinder ,  Steven Bruce Dawes ,  Phong Diep ,  Brian Lee Harper ,  Pushkar Tandon

IPC: G02B6/028 ,  G02B6/036 ,  C03B37/014

Abstract: A method of forming an optical fiber, including: exposing a soot core preform to a dopant gas at a pressure of from 1.5 atm to 40 atm, the soot core preform comprising silica, the dopant gas comprising a first halogen doping precursor and a second halogen doping precursor, the first halogen doping precursor doping the soot core preform with a first halogen dopant and the second halogen precursor doping the soot core preform with a second halogen dopant; and sintering the soot core preform to form a halogen-doped closed-pore body, the halogen-doped closed-pore body having a combined concentration of the first halogen dopant and the second halogen dopant of at least 2.0 wt %.

公开(公告)号：US20200048136A1

公开(公告)日：2020-02-13

申请号：US16529123

申请日：2019-08-01

Applicant: CORNING INCORPORATED

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

IPC: C03B37/014 ,  C03C3/06

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 in a gas-phase environment that has a low partial pressure of impermeable gases. Impermeable gases are difficult to remove from halogen-doped fiber preforms and lead to defects in optical fibers drawn from the preforms. A low partial pressure of impermeable gases in the sintering environment leads to a low concentration of impermeable gases and a low density of gas-phase voids in densified halogen-doped silica. Preforms with fewer defects result.

公开(公告)号：US10011517B2

公开(公告)日：2018-07-03

申请号：US14294389

申请日：2014-06-03

Applicant: CORNING INCORPORATED

Inventor： Dana Craig Bookbinder ,  Steven Bruce Dawes ,  Richard Michael Fiacco ,  Andrey V Filippov ,  Pushkar Tandon

IPC: C03B19/09 ,  C03B37/012

CPC classification number: C03B37/01282 ,  C03B19/09 ,  Y02P40/57 ,  Y10T428/2927

Abstract: Optical preforms and methods for forming optical preforms are disclosed. According to one embodiment, a method for producing an optical preform includes compressing silica-based glass soot to form a porous optical preform comprising a soot compact. The porous optical preform is heated to a dwell temperature greater than or equal to 100° C. Thereafter, the porous optical preform is humidified at the dwell temperature in a water-containing atmosphere having a dew point greater than or equal to 30° C. to form a humidified porous optical preform. The soot compact portion of the humidified porous optical preform generally comprises greater than or equal to 0.5 wt. % water.