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1.发明公开公开(公告)号：US20240294417A1
公开(公告)日：2024-09-05
申请号：US18646771
申请日：2024-04-26
发明人： Naoto NODA , Dai INOUE , Hitoshi IINUMA , Hiromasa MIZUKAMI
IPC分类号： C03B37/018
CPC分类号： C03B37/01815 , C03B2207/32 , C03B2207/34 , C03B2207/81 , C03B2207/87 , C03B2207/88
摘要： 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.
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公开(公告)号：US20240230984A9
公开(公告)日：2024-07-11
申请号：US18191683
申请日：2023-03-28
发明人： Peter HOFMANN , Peter JAKOPIC , Martin H. MUENDEL
IPC分类号： G02B6/02 , C03B37/012 , C03B37/018 , C03B37/027
CPC分类号： G02B6/02338 , C03B37/01217 , C03B37/01815 , C03B37/02718 , C03B37/02736 , G02B6/02395
摘要： 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.
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公开(公告)号：US20240150218A1
公开(公告)日：2024-05-09
申请号：US18387631
申请日：2023-11-07
申请人： CORNING INCORPORATED
发明人： 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分类号： C03B37/027 , C03B37/012 , C03B37/018
CPC分类号： C03B37/02718 , C03B37/01214 , C03B37/01876 , C03B2203/16
摘要： 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.
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公开(公告)号：US20240150217A1
公开(公告)日：2024-05-09
申请号：US18376195
申请日：2023-10-03
申请人： CORNING INCORPORATED
发明人： Kirk Patton Bumgarner , Stephen Mitchell Carlton , Elena Alekseevna Chizhova-Notkina , Robert James Davis , Nikolay Anatolyevich Panin , Bradley Kent Shepard
IPC分类号： C03B37/018
CPC分类号： C03B37/01884
摘要： 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.
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公开(公告)号：US20240134113A1
公开(公告)日：2024-04-25
申请号：US18191683
申请日：2023-03-27
发明人： Peter HOFMANN , Peter JAKOPIC , Martin H. MUENDEL
IPC分类号： G02B6/02 , C03B37/012 , C03B37/018 , C03B37/027
CPC分类号： G02B6/02338 , C03B37/01217 , C03B37/01815 , C03B37/02718 , C03B37/02736 , G02B6/02395
摘要： 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.
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公开(公告)号：US11795098B2
公开(公告)日：2023-10-24
申请号：US17189822
申请日：2021-03-02
发明人： Naoto Noda
IPC分类号： C03B37/018 , C03B37/014
CPC分类号： C03B37/01815 , C03B37/014 , C03B37/0142 , C03B37/01413
摘要： 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.
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公开(公告)号：US11787726B2
公开(公告)日：2023-10-17
申请号：US17581276
申请日：2022-01-21
发明人： Yusuke Kashiwagi
IPC分类号： C03B37/018 , C03B37/014
CPC分类号： C03B37/01853 , C03B37/0146
摘要： 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.
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公开(公告)号：US11565964B2
公开(公告)日：2023-01-31
申请号：US15712791
申请日：2017-09-22
发明人： Masaki Nakajima , Seiichi Shinada
IPC分类号： C03B37/018 , C03B37/012 , C03B37/014
摘要： 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.].
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公开(公告)号：US11407671B2
公开(公告)日：2022-08-09
申请号：US16243621
申请日：2019-01-09
IPC分类号： C03B37/018 , H01S3/16 , H01S3/067 , C03B37/027 , C03C25/105 , C03C25/005
摘要： 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.
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10.发明授权公开(公告)号：US11352286B2
公开(公告)日：2022-06-07
申请号：US16555185
申请日：2019-08-29
申请人： Draka Comteq B.V.
IPC分类号： C03B37/012 , C03B37/018 , C03B37/029
摘要： The invention relates to exemplary methods, devices, and systems for heating an elongate silica cylinder to form a core-rod for optical fibers. An exemplary heating device includes an elongate cavity, an elongate liner bounding the cavity, a heating element in a heating element space surrounding the liner, the liner separating the heating element space from the cavity, and a gas flushing device for effecting a flow of gas at least through the heating element space. An exemplary method includes providing the elongate silica cylinder such that it extends through the cavity, heating the cylinder locally beyond its softening temperature, and effecting a flow of argon and nitrogen gas during the heating.
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