公开(公告)号：US20230121772A1

公开(公告)日：2023-04-20

申请号：US17965845

申请日：2022-10-14

Applicant: CORNING INCORPORATED

Inventor： Kevin Wallace Bennett ,  Steven Bruce Dawes ,  Alexandra Lai Ching Kao Andrews Mitchell ,  Steven Alvin Tietje ,  Matthew Artus Tuggle

IPC: H01S3/067

Abstract: A method of fabricating an optical fiber, the method including providing a core portion including a doped portion having greater than or equal to 1.6 wt. % of a halide dopant and eliminating seed precursor sites at an exterior surface of the core portion, the seed precursor sites forming seeds in the optical fiber, wherein the eliminating the seed precursor sites includes one or more of: (i) fabricating the core portion by densifying an exterior portion of a silica soot body prior to exposing the silica soot body to the halide dopant, and (ii) exposing the exterior surface of the core portion to a reactive etchant. The method further including forming an optical fiber preform by applying cladding material to the exterior surface of the core portion and drawing the fiber preform into the optical fiber.

公开(公告)号：US11261121B2

公开(公告)日：2022-03-01

申请号：US16165633

申请日：2018-10-19

Applicant: Corning Incorporated

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

IPC: C03B37/014 ,  C03B37/012 ,  C03B37/018 ,  C03B37/027 ,  G02B6/02

Abstract: Preparation of halogen-doped silica is described. The preparation includes doping silica with high halogen concentration, sintering halogen-doped silica to a closed-pore state, and subjecting the closed-pore silica body to a thermal treatment process and/or a pressure treatment process. The temperature of thermal treatment is sufficiently high to facilitate reaction of unreacted doping precursor trapped in voids or interstices of the glass structure, but is below temperatures conducive to foaming. Core canes or fibers drawn from halogen-doped silica subjected to the thermal treatment and/or pressure treatment show improved optical quality and possess fewer defects. The thermal treatment and/or pressure treatment is particularly advantageous when used for silica doped with high concentrations of halogen.

公开(公告)号：US11175450B2

公开(公告)日：2021-11-16

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 ,  C03B37/014 ,  G02B6/036

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：US20200087195A1

公开(公告)日：2020-03-19

申请号：US16568856

申请日：2019-09-12

Applicant: CORNING INCORPORATED

Inventor： Steven Bruce Dawes ,  Pushkar Tandon

IPC: C03B37/018 ,  C03B37/027

Abstract: A method of forming an optical fiber preform includes: flowing a silicon halide and an oxidizer inside of a substrate tube, wherein a molar ratio of the silicon halide to the oxidizer is from about 1.5 to about 5.0; applying a plasma to the substrate tube to heat the substrate tube to a temperature of from about 1000° C. to about 1700° C.; and depositing silica glass comprising a halogen inside the substrate tube.

公开(公告)号：US20190119143A1

公开(公告)日：2019-04-25

申请号：US16165633

申请日：2018-10-19

Applicant: Corning Incorporated

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

IPC: C03B37/014 ,  C03B37/018 ,  C03B37/012 ,  C03B37/027 ,  G02B6/02

Abstract: Preparation of halogen-doped silica is described. The preparation includes doping silica with high halogen concentration, sintering halogen-doped silica to a closed-pore state, and subjecting the closed-pore silica body to a thermal treatment process and/or a pressure treatment process. The temperature of thermal treatment is sufficiently high to facilitate reaction of unreacted doping precursor trapped in voids or interstices of the glass structure, but is below temperatures conducive to foaming. Core canes or fibers drawn from halogen-doped silica subjected to the thermal treatment and/or pressure treatment show improved optical quality and possess fewer defects. The thermal treatment and/or pressure treatment is particularly advantageous when used for silica doped with high concentrations of halogen.

公开(公告)号：US10215915B2

公开(公告)日：2019-02-26

申请号：US15714122

申请日：2017-09-25

Applicant: Corning Incorporated

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

IPC: G02B6/28 ,  C03B37/014 ,  G02B6/028 ,  G02B6/02 ,  G02B6/036 ,  C03C3/06

Abstract: According to embodiments, an optical fiber may include a core portion comprising an outer radius rC and a maximum relative refractive index ΔCmax. A cladding may surround the core portion and include a low-index trench and an outer cladding. The low index trench may surround the core portion and includes an outer radius rT and relative refractive index ΔT. The outer cladding may surround and be in direct contact with the low-index trench. The outer cladding may be formed from silica-based glass comprising greater than 1.0 wt. % bromine and has a relative refractive index ΔOC, wherein ΔCmax>ΔOC>ΔT. The optical fiber may have a cable cutoff of less than or equal to 1530 nm. An attenuation of the optical fiber may be less than or equal to 0.185 dB/km at a wavelength of 1550 nm.

公开(公告)号：US09975802B2

公开(公告)日：2018-05-22

申请号：US14278437

申请日：2014-05-15

Applicant: Corning Incorporated

Inventor： Steven Bruce Dawes ,  Pushkar Tandon

IPC: C03B37/014 ,  C03B37/012 ,  G02B6/02 ,  G02B6/036 ,  G02B6/028

CPC classification number: C03B37/012 ,  C03B37/01453 ,  C03B2201/12 ,  C03B2203/22 ,  C03B2203/23 ,  C03B2203/26 ,  G02B6/02038 ,  G02B6/0283 ,  G02B6/03627 ,  G02B6/0365

Abstract: A method of making an optical fiber preform comprising in order: (i) manufacturing a glass preform with at least one porous layer; (ii) exposing the glass preform with at least one porous layer to a fluorine precursor at temperature below 1295° C. to make a fluorine treated preform, and (iii) exposing the fluorine treated glass preform with at least one porous silica based layer the temperatures above 1400° C. to completely sinter the preform. Preferably, the porous silica based layer of the glass preform exposed to fluorine precursor has average density of at least 0.7 g/cm3 but less than 1.9 g/cm3.

公开(公告)号：US08987155B2

公开(公告)日：2015-03-24

申请号：US13973428

申请日：2013-08-22

Applicant: Corning Incorporated

Inventor： Sezhian Annamalai ,  Steven Bruce Dawes ,  Kenneth Edward Hrdina

IPC: C03C3/06 ,  C03C3/097 ,  C03C3/076 ,  C03C3/095 ,  C03C4/00 ,  C03B19/12

CPC classification number: C03C3/097 ,  C03B19/12 ,  C03B2201/075 ,  C03B2201/23 ,  C03B2201/40 ,  C03B2201/42 ,  C03C3/06 ,  C03C3/076 ,  C03C3/095 ,  C03C4/0085 ,  C03C2201/23 ,  C03C2201/40 ,  C03C2201/42 ,  C03C2203/34 ,  C03C2203/42 ,  C03C2203/50

Abstract: This disclosure is directed to a silica-titania-niobia glass and to a method for making the glass. The composition of the silica-titania-niobia (SiO2—TiO2—Nb2O5) glass, determined as the oxides, is Nb2O5 in an amount in the range of 0.005 wt. % to 1.2 wt. %, TiO2 in an amount in the range of 5 wt. % to 10 wt. %, and the remainder of glass is SiO2. In the method, the STN glass precursor is consolidated into a glass by heating to a temperature of 1600° C. to 1700° C. in flowing helium for 6 hours to 10 hours. When this temperature is reached, the helium flow can be replaced by argon for the remainder of the time. Subsequently the glass is cooled to approximately 1050° C., and then from 1050° C. to 700° C. followed by turning off the furnace and cooling the glass to room temperature at the natural cooling rate of the furnace.

Abstract translation: 本公开涉及二氧化硅 - 二氧化钛 - 铌玻璃和制造该玻璃的方法。 作为氧化物测定的二氧化硅 - 二氧化钛 - 氧化铌（SiO2-TiO2-Nb2O5）玻璃的组成为Nb2O5，其量为0.005重量％ ％〜1.2重量％ ％，TiO 2的量为5wt。 ％〜10重量％ ％，玻璃的其余部分为SiO2。 在该方法中，通过在流动氦中加热至1600℃至1700℃的温度6小时至10小时，将STN玻璃前体固结成玻璃。 当达到这个温度时，氦气流可以在一段时间内用氩气代替。 随后将玻璃冷却至约1050℃，然后冷却至1050℃至700℃，随后关闭炉，并以炉的自然冷却速率将玻璃冷却至室温。

公开(公告)号：US20140066286A1

公开(公告)日：2014-03-06

申请号：US13973428

申请日：2013-08-22

Applicant: CORNING INCORPORATED

Inventor： Sezhian Annamalai ,  Steven Bruce Dawes ,  Kenneth Edward Hrdina

IPC: C03C3/097 ,  C03B19/12 ,  C03C3/06

CPC classification number: C03C3/097 ,  C03B19/12 ,  C03B2201/075 ,  C03B2201/23 ,  C03B2201/40 ,  C03B2201/42 ,  C03C3/06 ,  C03C3/076 ,  C03C3/095 ,  C03C4/0085 ,  C03C2201/23 ,  C03C2201/40 ,  C03C2201/42 ,  C03C2203/34 ,  C03C2203/42 ,  C03C2203/50

Abstract: This disclosure is directed to a silica-titania-niobia glass and to a method for making the glass. The composition of the silica-titania-niobia (SiO2—TiO2—Nb2O5) glass, determined as the oxides, is Nb2O5 in an amount in the range of 0.005 wt. % to 1.2 wt. %, TiO2 in an amount in the range of 5 wt. % to 10 wt. %, and the remainder of glass is SiO2. In the method, the STN glass precursor is consolidated into a glass by heating to a temperature of 1600° C. to 1700° C. in flowing helium for 6 hours to 10 hours. When this temperature is reached, the helium flow can be replaced by argon for the remainder of the time. Subsequently the glass is cooled to approximately 1050° C., and then from 1050° C. to 700° C. followed by turning off the furnace and cooling the glass to room temperature at the natural cooling rate of the furnace.

Abstract translation: 本公开涉及二氧化硅 - 二氧化钛 - 铌玻璃和制造该玻璃的方法。 作为氧化物测定的二氧化硅 - 二氧化钛 - 氧化铌（SiO2-TiO2-Nb2O5）玻璃的组成为Nb2O5，其量为0.005重量％ ％〜1.2重量％ ％，TiO 2的量为5wt。 ％〜10重量％ ％，玻璃的其余部分为SiO2。 在该方法中，通过在流动氦中加热至1600℃至1700℃的温度6小时至10小时，将STN玻璃前体固结成玻璃。 当达到这个温度时，氦气流可以在一段时间内用氩气代替。 随后将玻璃冷却至约1050℃，然后冷却至1050℃至700℃，随后关闭炉，并以炉的自然冷却速率将玻璃冷却至室温。

公开(公告)号：US20250019289A1

公开(公告)日：2025-01-16

申请号：US18767122

申请日：2024-07-09

Applicant: CORNING INCORPORATED ,  HOYA CORPORATION

Inventor： Steven Bruce Dawes ,  Douglas Hull Jennings ,  Toshihiko Orihara ,  Pushkar Tandon

IPC: C03B19/06 ,  C03B25/02 ,  C03C3/076

Abstract: A method of forming a glass body, the method including pressing titania-doped silica soot to form a molded body, consolidating the molded body by heating the molded body, annealing the consolidated molded body, and polishing at least one surface of the annealed molded body to form the glass body. After the polishing, the at least one surface of the glass body has a waviness amplitude of about 0.60 nm or less in the spatial frequency range of 0.05 mm−1 or more and 0.2 mm−1 or less.