公开(公告)号：US20250050302A1

公开(公告)日：2025-02-13

申请号：US18721982

申请日：2022-12-21

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Tomomi MORIYA

IPC: B01J19/24 ,  B01J19/00 ,  C01B33/18 ,  C03B37/018

Abstract: The present disclosure relates to a furnace for manufacturing a glass particle deposit by depositing glass particles generated from a glass raw material. The furnace includes two or more portions that are not fixed to each other in an upper-lower direction which is an axial direction of the glass particle deposit. The two or more portions include a first portion and a second portion which are independently formed, and the two or more portions have a structure in which the first portion and the second portion do not interfere with each other when the first portion is deformed by thermal expansion.

公开(公告)号：US20240294417A1

公开(公告)日：2024-09-05

申请号：US18646771

申请日：2024-04-26

Applicant: SHIN-ETSU CHEMICAL CO., LTD.

Inventor： Naoto NODA ,  Dai INOUE ,  Hitoshi IINUMA ,  Hiromasa MIZUKAMI

IPC: C03B37/018

CPC classification number: C03B37/01815 ,  C03B2207/32 ,  C03B2207/34 ,  C03B2207/81 ,  C03B2207/87 ,  C03B2207/88

Abstract: In a method of manufacturing porous glass base for optical fiber, a liquid organic siloxane raw material stored in a raw material tank of internal pressure P1 is controlled by a mass flow controller at a predetermined flow rate and pumped through pipe of internal pressure P2 to a vaporizer, the liquid raw material is vaporized in the vaporizer and supplied as a gas raw material to a burner, and the silica fine particles formed by burning the gas raw material in the burner are deposited to form a porous glass base material, where P1≤P2 is satisfied.

公开(公告)号：US20240230984A9

公开(公告)日：2024-07-11

申请号：US18191683

申请日：2023-03-28

Applicant: Lumentum Operations LLC

Inventor： Peter HOFMANN ,  Peter JAKOPIC ,  Martin H. MUENDEL

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

CPC classification number: G02B6/02338 ,  C03B37/01217 ,  C03B37/01815 ,  C03B37/02718 ,  C03B37/02736 ,  G02B6/02395

Abstract: In some implementations, a substrate tube in a modified chemical vapor deposition process may rotate while glass precursors flow into the substrate tube at a fixed rate. Dopants may be delivered into the substrate tube while heat is applied to the substrate tube to deposit, on an inner wall of the substrate tube, a layer of material including the glass precursors and the dopants. A lateral position of an exit of an injection tube used to deliver the dopants may be adjusted while the substrate tube is rotated and heat is applied to the substrate tube such that the material deposited on the inner wall of the substrate tube has an azimuthally non-uniform doping concentration. Alternatively, a rotation of the substrate tube may be adjusted to create opposing temperature gradients within the substrate tube, causing non-uniform layer deposition to occur on different sides of the substrate tube in alternating passes.

公开(公告)号：US20240150218A1

公开(公告)日：2024-05-09

申请号：US18387631

申请日：2023-11-07

Applicant: CORNING INCORPORATED

Inventor： Paulo Clovis Dainese, JR. ,  Matthew Ryan Drake ,  Richard Michael Fiacco ,  Brian Lee Harper ,  Ming-Jun Li ,  Silver Nyambo ,  Matthew John Rice ,  Jeffery Scott Stone ,  Matthew Artus Tuggle

IPC: C03B37/027 ,  C03B37/012 ,  C03B37/018

CPC classification number: C03B37/02718 ,  C03B37/01214 ,  C03B37/01876 ,  C03B2203/16

Abstract: A method of manufacturing a preform, the method including positioning at least one glass tube in a glass outer cladding to form a preform precursor, the glass tube comprising a first open end and a second open end, forming a preform from the preform precursor, and thermally treating at least one of the preform precursor and the preform. The thermally treating including sealing the first open end and the second open end of the glass tube to form a closed tube and heating and/or cooling the glass tube to manipulate gas pressure within the closed glass tube.

公开(公告)号：US20240150217A1

公开(公告)日：2024-05-09

申请号：US18376195

申请日：2023-10-03

Applicant: CORNING INCORPORATED

Inventor： Kirk Patton Bumgarner ,  Stephen Mitchell Carlton ,  Elena Alekseevna Chizhova-Notkina ,  Robert James Davis ,  Nikolay Anatolyevich Panin ,  Bradley Kent Shepard

IPC: C03B37/018

CPC classification number: C03B37/01884

Abstract: A lathe system for producing an optical fiber preform, the lathe system including a rotating bait rod, a burner box configured to deposit silica-containing soot on the rotating bait rod, a hood configured to direct airflow within the lathe system through an exhaust, and a perforated floor configured to expel air within the lathe system as a plurality of air jets from a bottom portion of the lathe system to a top portion of the lathe system.

公开(公告)号：US20240134113A1

公开(公告)日：2024-04-25

申请号：US18191683

申请日：2023-03-27

Applicant: Lumentum Operations LLC

Inventor： Peter HOFMANN ,  Peter JAKOPIC ,  Martin H. MUENDEL

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

CPC classification number: G02B6/02338 ,  C03B37/01217 ,  C03B37/01815 ,  C03B37/02718 ,  C03B37/02736 ,  G02B6/02395

Abstract: In some implementations, a substrate tube in a modified chemical vapor deposition process may rotate while glass precursors flow into the substrate tube at a fixed rate. Dopants may be delivered into the substrate tube while heat is applied to the substrate tube to deposit, on an inner wall of the substrate tube, a layer of material including the glass precursors and the dopants. A lateral position of an exit of an injection tube used to deliver the dopants may be adjusted while the substrate tube is rotated and heat is applied to the substrate tube such that the material deposited on the inner wall of the substrate tube has an azimuthally non-uniform doping concentration. Alternatively, a rotation of the substrate tube may be adjusted to create opposing temperature gradients within the substrate tube, causing non-uniform layer deposition to occur on different sides of the substrate tube in alternating passes.

公开(公告)号：US11795098B2

公开(公告)日：2023-10-24

申请号：US17189822

申请日：2021-03-02

Applicant: Shin-Etsu Chemical Co., Ltd.

Inventor： Naoto Noda

IPC: C03B37/018 ,  C03B37/014

CPC classification number: C03B37/01815 ,  C03B37/014 ,  C03B37/0142 ,  C03B37/01413

Abstract: A manufacturing method of a porous glass base material for optical fiber includes: supplying an organic siloxane raw material supplied from a raw material tank is fed to a vaporizer; mixing and vaporizing the raw material and carrier gas in the vaporizer; and externally depositing SiO2 fine particles through combustion reaction by supplying the mixed gas of raw the material and the carrier gas to the burner in the manufacturing apparatus of porous glass base material for optical fiber. Before starting to supply the raw material to a raw material gas supply pipe of the burner, the burner and the inside of a manufacturing apparatus of porous glass base material for optical fiber are pre-heated by flowing purge gas of 60° C. or higher into the raw material gas supply pipe and supplying combustible gas and combustion supporting gas to the burner.

公开(公告)号：US11787726B2

公开(公告)日：2023-10-17

申请号：US17581276

申请日：2022-01-21

Applicant: Shin-Etsu Chemical Co., Ltd.

Inventor： Yusuke Kashiwagi

IPC: C03B37/018 ,  C03B37/014

CPC classification number: C03B37/01853 ,  C03B37/0146

Abstract: A sintering apparatus comprising: a furnace core tube containing a porous glass base material for optical fiber whose longitudinal direction is along the axial direction; and a multi-stage heater in which two or more heaters surround the furnace core tube and are arranged in the axial direction of the furnace core tube to form a heating area in the furnace core tube, is used. The sintering method includes a step in which the base material is heated in the heating area to perform a first dehydration process; and a step in which the base material is moved so that the position in the longitudinal direction of the base material where the dehydration was identified as the most insufficient, is at the position in the axial direction of the furnace core tube where the temperature is highest in the heating area, and then a second dehydration process is performed.

公开(公告)号：US11565964B2

公开(公告)日：2023-01-31

申请号：US15712791

申请日：2017-09-22

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masaki Nakajima ,  Seiichi Shinada

IPC: C03B37/018 ,  C03B37/012 ,  C03B37/014

Abstract: A method of manufacturing a porous glass preform includes depositing glass particles on an outer periphery of a target rod while a burner for synthesizing glass particles and the target rod that is rotating are relatively reciprocated, wherein V and r are gradually reduced while a variation in sweeping pitch P [mm] expressed as V/r is caused to be within a range of a central value±10% when a glass particle deposition layer of a portion satisfying a relation 0.5 L≤R≤0.8 L is synthesized; where a final outer diameter of the manufactured porous glass preform for an optical fiber is L [mm], an outer diameter of a glass particle deposition body in the middle of the manufacture is R [mm], a rotating speed of the target rod is r [rpm], and a relative moving speed between the target rod and the burner is V [mm/min.].

公开(公告)号：US11407671B2

公开(公告)日：2022-08-09

申请号：US16243621

申请日：2019-01-09

Applicant: COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH

Inventor： Paul Mukul Chandra ,  Dhar Anirban ,  Das Shyamal ,  Pal Mrinmay ,  Bhadra Shyamal Kumar

IPC: C03B37/018 ,  H01S3/16 ,  H01S3/067 ,  C03B37/027 ,  C03C25/105 ,  C03C25/005

Abstract: The present application provides a process of fabrication of erbium and ytterbium-co-doped multielements silica glass based cladding-pumped fiber for use as a highly efficient high power optical amplifier.