Outside Of Tube Or Rod By Soot Buildup Patents (Class 65/421)
  • Patent number: 11370690
    Abstract: An apparatus for manufacturing glass preforms for optical fibers includes a reaction chamber surrounding a deposition region, a holding device for holding a target rod within said deposition region, one or a plurality of deposition burners positioned below said deposition region and configured to direct a high temperature flow of forming glass particles toward said target rod, a hood positioned opposite to the deposition burners with respect to said holding device and configured for discharging soot of un-deposited glass particles, said hood including at least one exhaust port provided at a first end portion thereof and side panels extending from a second end portion thereof toward said first end portion. At least a portion of the side panels of the hood is gas permeable.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: June 28, 2022
    Assignee: Prysmian S.p.A.
    Inventor: Stefano Grieco
  • Patent number: 11155488
    Abstract: A manufacturing method of a porous glass preform for optical fiber by depositing glass microparticles on a starting member, including supplying a vaporizer with organic silicon compound raw material in a liquid state and a carrier gas; in the vaporizer, mixing and vaporizing the organic silicon compound raw material in a liquid state and the carrier gas to convert the organic silicon compound raw material and the carrier gas into a raw material mixed gas; supplying a burner with the raw material mixed gas and a combustible gas, combusting the raw material mixed gas and the combustible gas in the burner, and ejecting SiO2 microparticles generated by the combustion from the burner; and depositing the SiO2 microparticles ejected from the burner on the starting member by repeatedly moving the vaporizer and the burner together, in a synchronized manner, parallel to the starting member in a longitudinal direction thereof.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: October 26, 2021
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Naoto Noda, Hitoshi Iinuma, Dai Inoue
  • Patent number: 11114812
    Abstract: Laser waveguides, methods and systems for forming a laser waveguide are provided. The waveguide includes an inner cladding layer surrounding a central axis and a glass core surrounding and located outside of the inner cladding layer. The glass core includes a laser-active material. The waveguide includes an outer cladding layer surrounding and located outside of the glass core. The inner cladding, outer cladding and/or core may surround a hollow central channel or bore and may be annular in shape.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: September 7, 2021
    Assignee: Corning Incorporated
    Inventors: Douglas Llewellyn Butler, Daniel Warren Hawtof
  • Patent number: 10995030
    Abstract: A manufacturing method of an optical fiber preform used to produce an optical fiber includes: etching a surface of a core preform that forms a core of the optical fiber with a plasma flame in a chamber; obtaining a porous preform by depositing glass particles on an etched surface of the core preform to form an outside vapor-deposited layer that forms a cladding of the optical fiber in a state where the core preform is put into the chamber; and heating and sintering the porous preform. When obtaining the porous preform, the outside vapor-deposited layer is formed by repeatedly performing the deposition of the glass particles multiple times through supply of source material gas. In a first deposition among the multiple times of deposition of the glass particles, a flow rate of the source material gas is less than or equal to 50% of a stable value.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: May 4, 2021
    Assignee: Fujikura Ltd.
    Inventor: Katsubumi Nagasu
  • Patent number: 10893577
    Abstract: An improved process for preheating and doping a preform having a consolidated glass core and a silica soot cladding surrounding core involves waveguiding millimeter wavelength electromagnetic radiation into the preform to cause heating of the preform within the interior via absorption of the electromagnetic radiation by silica in the preform while the preform is exposed to a gas phase dopant.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: January 12, 2021
    Assignee: Corning Incorporated
    Inventor: Martin Hempstead
  • Patent number: 10829405
    Abstract: A method is provided for producing a glass fine particle deposit by a VAD method using a core deposition burner and a cladding deposition burner disposed adjacent to the core deposition burner. The cladding deposition burner including five cylindrical tubes having different outer diameters and concentrically superimposed on one another and a group of small-diameter nozzles arranged in a ring shape in a third region from the inner side. The method includes flowing, in the cladding deposition burner, a glass raw material gas and a combustion supporting gas in a first region from the inner side, air in a second region from the inner side, a combustible gas in the third region from the inner side, a combustion supporting gas in the group of small-diameter nozzles, an inert gas in a fourth region from the inner side, and a combustion supporting gas in a fifth region from the inner side, respectively.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: November 10, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Yuhei Urata, Hiroki Kojima
  • Patent number: 10710924
    Abstract: An optical fiber production method includes: drawing an optical fiber from an optical fiber preform in a drawing furnace; cooling the optical fiber in an annealing furnace; and delivering the optical fiber into the annealing furnace, and controlling a temperature difference between a temperature of the optical fiber and a fictive temperature of glass forming a core included in the optical fiber to be higher than 20° C. and lower than 100° C.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: July 14, 2020
    Assignee: Fujikura Ltd.
    Inventors: Takayuki Kitamura, Akihito Imase
  • Patent number: 10464838
    Abstract: A deposition system for depositing a chemical vapor onto a workpiece is disclosed, including a deposition chamber having a plurality of components for performing chemical vapor deposition on the workpiece. The workpiece is held by a lathe that rotates the workpiece relative to chemical burners that deposit silica soot on the workpiece. The deposition system has a gas panel for regulating the flow of gases and vapors into the deposition chamber, and a computer for controlling operation of the gas panel and the components in the deposition chamber. Multiple sets of chemical burners are disposed longitudinally along the length of the workpiece. Each set of burners is separated from other sets, such that each set of burners deposit silica particles onto generally different portions of a workpiece. The respective portions include an overlap segment in which one or more burners from one burner set will deposit silica particles on the same portion of the workpiece as one or more burners from another set.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: November 5, 2019
    Assignee: ASI/SILICA MACHINERY, LLC
    Inventor: David McDonald Stirling
  • Patent number: 10393887
    Abstract: The present invention discloses one or more compounds that oscillate between a first state and a second state due to absorption of high energy, with the oscillations facilitating prevention of solarization of a glass system for reuse while generating scintillations for determining existence of high radiation energy. The generation of scintillations have a duration that is commensurate with a duration of the irradiation of the glass system, and cease when irradiation is ceased without affecting the glass system.
    Type: Grant
    Filed: July 17, 2016
    Date of Patent: August 27, 2019
    Inventors: Ashot A. Margaryan, Alfred A. Margaryan
  • Patent number: 10329196
    Abstract: There is provided a method to fabricate optical taps and waveguide devices in photonic crystal fibers and other fibers with hollow structures. The method involves a preparation step, where the hollow holes inside the fiber are collapsed or partially modified locally; and a waveguide fabrication step, where a femtosecond laser is focused inside the fiber and used to produce optical waveguides that interact in the region that was previously modified in the preparation step.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: June 25, 2019
    Assignee: OZ OPTICS LTD.
    Inventors: Omur Sezerman, Luis Andre Fernandes, Garland Best, Mi Li Ng, Saidou Kane
  • Patent number: 9873629
    Abstract: Methods for forming optical fiber preforms with low-index trenches are disclosed. According to one embodiment, the method includes depositing silica-based glass soot on a bait rod to form a low-index trench region of the optical fiber preform. The silica-based glass soot is deposited such that the low-index trench region has a first density. Thereafter a barrier layer having a second density greater than the first density is formed around the low-index trench region. Therafter, an overclad region is deposited around the barrier layer. The bait rod is then removed from a central channel of the trench-overclad assembly. A separate core assembly is inserted into the central channel. A down-dopant gas is then directed through the central channel of the trench-overclad assembly as the trench-overclad assembly is heated to dope the low-index trench region. The barrier layer prevents diffusion of the down-dopant from the low-index trench region into the overclad region.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: January 23, 2018
    Assignee: Corning Incorporated
    Inventors: Steven Bruce Dawes, Robert A Knowlton, Pushkar Tandon, Ji Wang
  • Patent number: 9067815
    Abstract: It is an objective of the present invention to provide a method for sintering a porous glass base material that can experience an earthquake or large vibration without the base material falling or decreasing in quality when performing sintering, dehydration, and transparent vitrification on the porous glass base material. Provided is a method of sintering a porous glass base material including sintering by lowering the porous glass base material vertically through a furnace from above while rotating the porous glass base material, the method comprising changing rotational speed of the porous glass base material during the sintering.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: June 30, 2015
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventor: Makoto Yoshida
  • Publication number: 20150143852
    Abstract: A method for forming an optical glass preform from a soot preform is provided. The method includes forming a soot preform, placing the soot preform in a furnace, and applying a vacuum through a centerline hole of the soot preform.
    Type: Application
    Filed: November 18, 2014
    Publication date: May 28, 2015
    Inventors: Dana Craig Bookbinder, Richard Michael Fiacco, Ming-Jun Li, Jeffery Scott Stone, Pushkar Tandon
  • Patent number: 9032761
    Abstract: Provided is a porous glass matrix producing burner 10, wherein a third gas jetting opening 17, which is the most outward one of a plurality of gas jetting openings, is clogged by a clogging member 19, and one line or plural lines of gas jetting holes 20 are provided in the clogging member 19 concentrically with respect to the center line of a glass material gas jetting port 11. Hence, there are provided a porous glass matrix producing burner that can have the cross-sectional area of its most outward gas jetting opening changed and can have the flow rate and linear velocity of a combustion improving gas adjusted to thereby suppress diffusion of the combustion improving gas and a combustible gas and improve deposition efficiency, and a porous glass matrix producing method using the porous glass matrix producing burner.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: May 19, 2015
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventor: Makoto Yoshida
  • Patent number: 8997528
    Abstract: A known method for producing synthetic quartz glass comprises the method steps of: forming a stream of a SiO2 feedstock material which contains octamethylcyclotetrasiloxane (D4) as the main component which has a reference molecular mass assigned to it, feeding the stream to a reaction zone in which the feedstock material is converted under formation of amorphous SiO2 particles by pyrolysis or hydrolysis into SiO2, depositing the amorphous SiO2 particles on a deposition surface while forming a porous SiO2 soot body, and vitrifying the SiO2 soot body while forming the synthetic quartz glass.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: April 7, 2015
    Assignee: Heraeus Quarzglas GmbH & Co. KG
    Inventors: Heinz Fabian, Juergen Roeper
  • Patent number: 8997527
    Abstract: Provided is a method for manufacturing an optical fiber preform using a combustion burner. The method includes at least one of: a step ? of, when a mode is changed from a deposition mode to a non-deposition mode, changing a gas discharged from a combustion gas port of the burner from a combustion gas to a purge gas, while maintaining a pilot light and a flow rate of a supporting gas from supporting gas discharge nozzles of the burner so that the nozzle tip does not glow; and a step ? of, when the mode is changed from the non-deposition mode to the deposition mode, changing a gas discharged from the combustion gas port from a purge gas to a combustion gas, while maintaining a pilot light and the flow rate of the supporting gas so that the nozzle tip does not glow.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: April 7, 2015
    Assignee: Fujikura Ltd.
    Inventors: Naritoshi Yamada, Yuichi Kato
  • Patent number: 8984911
    Abstract: The present invention relates to a method for producing synthetic quartz glass, comprising the steps of: providing a liquid SiO2 feedstock material (105), which comprises more than 70% by wt. of the octamethylcyclotetrasiloxane D4, vaporizing the SiO2 feedstock material (105) into a gaseous SiO2 feedstock vapor (107), converting the SiO2 feedstock vapor (107) into SiO2 particles, depositing the SiO2 particles on a deposition surface (160) while forming a SiO2 soot body (200), vitrifying the SiO2 soot body (200) while forming the synthetic quartz glass. According to the invention it is provided that vaporizing the heated SiO2 feedstock material (105) comprises an injection phase in an expansion chamber (125) in which the heated SiO2 feedstock material (105) is atomized into droplets, the droplets having a mean diameter of less than 5 pm, preferably less than 2 ?m.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: March 24, 2015
    Assignee: Heraeus Quarzglas GmbH & Co. KG
    Inventors: Heinz Fabian, Juergen Roeper
  • Patent number: 8973407
    Abstract: A method for producing synthetic quartz glass comprises providing a liquid SiO2 feedstock material containing mainly octamethylcyclotetrasiloxane D4, vaporizing the SiO2 feedstock material into a feedstock vapor, converting the feedstock vapor into SiO2 particles, depositing the SiO2 particles on a deposition surface while forming a porous SiO2 soot body, and vitrifying the SiO2 soot body while forming the synthetic quartz glass. To produce large-volume cylindrical soot bodies with outer diameters of more than 300 mm of improved material homogeneity, the liquid feedstock material contains additional components comprising hexamethylcyclotrisiloxane D3 and its linear homolog with a weight fraction mD3, dodecamethylcyclohexasiloxane D6 and its linear homolog with a weight fraction mD6, and tetradecamethylcycloheptasiloxane D7 and/or hexadecamethylcyclooctasiloxane D8 and its linear homologs with a weight fraction mD7+. The weight ratio mD3/mD6 is in a range between 0.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: March 10, 2015
    Assignee: Heraeus Quarzglas GmbH & Co. KG
    Inventors: Heinz Fabian, Juergen Roeper
  • Publication number: 20150043880
    Abstract: Methods for producing a semifinished part for the manufacture of an optical fiber are disclosed. The methods are optimized in terms of bending. The methods include the steps of providing a shell tube with a shell refractive index which is lower in relation to the light-conducting core. Then, at least one protective, intermediate and/or barrier layer is applied to a radially outermost and/or innermost tube surface of the respective shell tube, wherein a build-up of light-conducting layers is realized on the inner side and/or the outer side of the shell tube. Finally, the shell tubes are joined by collapsing so as to form the semifinished part.
    Type: Application
    Filed: May 10, 2012
    Publication date: February 12, 2015
    Applicant: j-plasma GmbH
    Inventors: Lothar Brehm, Matthias Auth, Jörg Kötzing
  • Publication number: 20150033799
    Abstract: A glass particle deposit producing method capable of preventing the variation in the outside diameter of a glass particle deposit and enhancing the yield of a glass raw material is provided. A glass particle deposit is produced by mounting a starting rod 11 and a glass particle generating burner 22 inside a reaction vessel 2, introducing a glass raw material into the burner 22, subjecting the glass raw material to a flame decomposition reaction inside a flame formed by the burner 22 to generate glass particles, and depositing the generated glass particles on the starting rod 11. At this time, the dispersion angle of the glass raw material jetted from the burner 22 with respect to the center axis of the burner 22 is set to the range of 5 to 70 degrees.
    Type: Application
    Filed: December 27, 2013
    Publication date: February 5, 2015
    Inventors: Tomohiro Ishihara, Takashi Yamazaki
  • Patent number: 8919153
    Abstract: Provided is a method for manufacturing glass preforms with high yield. In the glass-preform manufacturing method according to the present invention, a glass preform is produced through a fixing step, a deposition step, an extraction step, a vitrification step, and a collapsing step in the enumerated order. At the deposition step, the mean density of the glass soot body deposited on the circumference of the tubular handle 12 is made higher than the mean density of the glass soot body deposited on the circumference of the starting mandrel 11. It is preferable that the longitudinal variation in the mean density of a glass soot body deposited from the start of deposition to the tenth layer of glass particles within the range of ±50 mm from the boundary position between the starting mandrel and the tubular handle be 0.01 g/cc/mm or less.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: December 30, 2014
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Tomohiro Ishihara
  • Patent number: 8919152
    Abstract: There is provided a method for manufacturing a porous glass base material by using a porous glass base material manufacturing burner having an oxidizing gas discharge port. The method includes supplying a gas mixture obtained by blending together an oxidizing gas and an inert gas to the oxidizing gas discharge port at a start of deposition of a glass fine particle, and increasing a flow rate of the oxidizing gas supplied to the oxidizing gas discharge port while decreasing a flow rate of the inert gas supplied to the oxidizing gas discharge port.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: December 30, 2014
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventor: Makoto Yoshida
  • Publication number: 20140338400
    Abstract: A soot glass deposit body is manufactured by placing a starting rod and a burner 22 for producing glass particulates in a reaction container, introducing a source material gas to the burner 22 through a supplying pipe 26, producing glass particulates by a pyrolytic oxidation reaction of the source material gas in a flame formed by the burner 22, and depositing the produced glass particulates on the starting rod. At the time, the source material gas to be supplied to the burner 22 is a siloxane, the burner 22 is heated so that temperature of the burner 22 falls within the range of from ?30° C. to +30° C. relative to the boiling point of the siloxane, and also temperature of the supplying pipe is controlled within the range of from the boiling point of the siloxane to the boiling point plus 30° C.
    Type: Application
    Filed: May 13, 2014
    Publication date: November 20, 2014
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Takashi YAMAZAKI, Tomohiro ISHIHARA
  • Patent number: 8869566
    Abstract: A method and apparatus for making an optical fiber preform. The apparatus has an outer wall and an inner wall. The outer wall surrounds the inner wall and the inner wall surrounds an inner cavity of the apparatus. A core rod is deposited in the inner cavity after which particulate glass material, such as glass soot, is deposited in the inner cavity around the core rod. The core rod has at least 10 percent of the final cladding soot already applied thereto. A radially inward pressure is applied against the particulate glass material to pressurize the particulate glass material against the core rod.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: October 28, 2014
    Assignee: Corning Incorporated
    Inventors: Martin Wade Allen, Steven Bruce Dawes, Robert Brett Desorcie, Nicolas LeBlond, Roger A Rose, Pushkar Tandon, Kochuparambil Vargheese, Li Yang
  • Patent number: 8840858
    Abstract: An apparatus for mixing a vaporized precursor with a gas for producing silica particles is provided. The apparatus includes a mixer housing, a precursor delivery chamber having an output in communication with the mixer housing for delivering a vaporized precursor in the mixer housing, and an oxidizing gas delivery chamber having an output in communication with the mixer housing for delivering an oxidizing gas to be mixed with the vaporized precursor. The apparatus further includes a flashback member disposed within the mixer housing and between the output of the precursor delivery chamber and the output of the oxidizing gas delivery chamber. The flashback member is located at a minimum distance from the output of the oxidizing gas delivery chamber defined by Lminimum (cm)=0.453 U (Re)?0.5567, wherein U is the flow rate in cm/sec of precursor and Re is the flow Reynolds number. The flashback member may include a tapered surface on at least one side to reduce recirculation of vaporized gas.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: September 23, 2014
    Assignee: Corning Incorporated
    Inventors: Lewis A Bernstein, Dana Craig Bookbinder, Jason A Dillard, Jennifer L Porter, Balram Suman, Pushkar Tandon
  • Patent number: 8820121
    Abstract: Provided is a method of manufacturing an optical fiber base material having at least four layer including a core, a first cladding, a second cladding containing fluorine, and a third cladding. The manufacturing method comprises preparing a starting base material that includes the core and the first cladding; forming a porous intermediate glass base material by supplying glass raw material and oxygen to a high-frequency induction thermal plasma torch to synthesize glass fine particles that are then deposited on a surface of the starting base material; forming an intermediate glass base material that includes the core, the first cladding, and the second cladding containing fluorine, by heating and vitrifying the porous intermediate glass base material in an atmosphere containing fluorine; and providing the third cladding on the outer surface of the intermediate glass base material.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: September 2, 2014
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventor: Tetsuya Otosaka
  • Patent number: 8783069
    Abstract: In a known process for producing a quartz glass cylinder, a porous soot tube, which is sintered to form the quartz glass cylinder, is produced by depositing SiO2 particles on an outer cylindrical surface of a support, which rotates about the longitudinal axis thereof and has a layer of silicon carbide (SiC layer). In order on this basis to specify a support having a high resistance to fracture, which firstly can easily be removed and which secondly presents a low risk of contamination for the soot body, the invention proposes that the SiC layer is treated at a high temperature in an oxygen-containing atmosphere before the SiO2 particles are deposited, in such a manner that an SiO2 protective layer having a thickness of at least 0.1 ?m is produced by oxidation.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: July 22, 2014
    Assignee: Heraeus Quarzglas GmbH & Co. KG
    Inventors: Anke Schuster, Rene Sowa, Martin Trommer, Udo Peper
  • Publication number: 20140174133
    Abstract: Methods for forming optical fiber preforms are disclosed. According to one embodiment, a method for forming an optical fiber preform includes forming a preform core portion from silica-based glass soot. The silica-based glass soot may include at least one dopant species for altering an index of refraction of the preform core portion. A selective diffusion layer of silica-based glass soot may be formed around the preform core portion to form a soot preform. The selective diffusion layer may have an as-formed density greater than the density of the preform core portion. A diffusing species may be diffused through the selective diffusion layer into the preform core portion. The soot preform may be sintered such that the selective diffusion layer has a barrier density which is greater than the as-formed density and the selective diffusion layer prevents diffusion of the at least one dopant species through the selective diffusion layer.
    Type: Application
    Filed: December 16, 2013
    Publication date: June 26, 2014
    Applicant: Corning Incorporated
    Inventors: Amanda Lee Billings, Liam Ruan de Paor, Robert Brett Desorcie, Robert Arnold Knowlton, Pushkar Tandon
  • Publication number: 20140165656
    Abstract: A method of fabricating an optical fiber preform, capable of depositing glass particles with high deposition rate without reducing deposition efficiency and fabricating an optical fiber preform having little bubbles using a burner having a simple structure, is provided. In the invention, a mixed gas of a glass raw material gas with a combustion assisting gas is ejected from an annular nozzle of a burner having a coaxially multiple tube structure, and a burnable gas is ejected from an inner nozzle located inside the annular nozzle. Alternatively, a mixed gas of a glass raw material gas with a burnable gas may be ejected from an annular nozzle, and a combustion assisting gas is ejected from an inner nozzle located inside the annular nozzle. In each case of the above, the burnable gas and the combustion assisting gas, respectively, are ejected from outer nozzles located outside the annular nozzle.
    Type: Application
    Filed: February 24, 2014
    Publication date: June 19, 2014
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventor: Makoto Yoshida
  • Patent number: 8746013
    Abstract: The invention relates to a burner module having a body that is either sintered or photo-cured, and to methods of making such a burner module. The body (110) of the burner (100) is formed from one of a sintered metal, a sintered alloy, a laminated glass ceramic, and a photo-cured polymer. 1 Sintering and photo-curing may be accomplished by irradiating the body with localized heating using a focused energy source, such as a laser. The burner module is resistant to thermal shock and provides a distributed, even stream of a precursor or precursors to be reacted in a flame of the burner module to form soot, which is to deposited on a receptor surface, and may be used for vapor and liquid precursor delivery systems. A soot deposition system having an array of such burner modules and methods of making a fused silica article by depositing soot using the burner modules are also described.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: June 10, 2014
    Assignee: Corning Incorporated
    Inventors: Muluwork Geremew, Daniel Warren Hawtof, Richard Curwood Peterson, Amy Lu Rovelstad, Christopher Clark Thompson
  • Publication number: 20140144188
    Abstract: An apparatus for manufacturing a glass base material, which is a base material of an optical fiber, the glass base material having a core rod as a central axis, comprises a holding unit having a plurality of scroll chucks connected in series along the core rod for holding an end of the core rod; and a burner that hydrolyzes a gas material, which is a base material of the glass base material, into glass particles and accumulates the glass particles around the core rod to form the glass base material.
    Type: Application
    Filed: October 15, 2013
    Publication date: May 29, 2014
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Junichiro Takei, Yuji Tobisaka, Hiroshi Machida, Hiroyuki Kume, Tadakatsu Shimada, Kiyoshi Yokokawa
  • Patent number: 8733131
    Abstract: An apparatus and method for chemical deposition on a rod member having a support structure for supporting the rod member substantially coaxial to a deposition axis; a burner for depositing chemical substances on the rod member; and a rotation device for imparting a rotation motion to the rod member. The rotation device has a joint member of a type suitable to transmit torque between two misaligned members, for example, a double universal joint or a flexible joint, positioned between a motor and a rod gripping member.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: May 27, 2014
    Assignee: Prysmian Cavi e Sistemi Energia S.R.L.
    Inventors: Franco Cocchini, Antonio Schiaffo, Alessandro Rossi
  • Patent number: 8707741
    Abstract: A method of manufacturing an optical fiber preform by depositing glass fine particles onto a surface of a glass rod while the glass rod is reciprocated relative to a plasma torch, including: moving the glass rod in a first direction relative to the plasma torch while the plasma torch is applied to the glass rod and supplied at least with a dopant material and a glass material to deposit the glass fine particles onto the surface of the glass rod, in such a manner that a plasma power is set higher during a first time interval starting from a beginning of the movement of the glass rod in the first direction than during a second time interval starting from an end of the first time interval; and moving the glass rod in a second direction relative to the plasma torch, where the second direction is opposite to the first direction.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: April 29, 2014
    Assignee: Shin-Etsu Chemical Co., Ltd
    Inventor: Tetsuya Otosaka
  • Patent number: 8695380
    Abstract: The present invention provides a quartz glass burner that can enhance the heating power of flame working without unnecessarily increasing the flow of combustion gas and improve the deposition efficiency on depositing glass particles onto a porous glass preform. The quartz glass burner has a large diameter outer tube, and a plurality of small diameter inner tubes enclosed in the outer tube, and a tip of the outer tube has a port defining member defining the outer shape of a combustion gas ejecting port that ejects combustion gas, and the port defining member protrudes from the inner circumference of the outer tube towards the center axis so as to block the outermost area including areas between the outer circumferences of a plurality of inner tubes forming the inner tube row and the inner circumference of the outer tube of the combustion gas flow path.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: April 15, 2014
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventor: Makoto Yoshida
  • Publication number: 20140060118
    Abstract: Manufacturing an optical fiber by using an outside vapor deposition technique for making a substrate, applying one or more layers to the substrate using a radial pressing technique to form a soot blank, sintering the soot blank in the presence of a gaseous refractive index-modifying dopant, and drawing the sintered soot blank, provides a more efficient and cost effective process for generating complex refractive index profiles.
    Type: Application
    Filed: November 27, 2012
    Publication date: March 6, 2014
    Inventors: Steven Bruce Dawes, Dominick Fiordimalva, Timothy Leonard Hunt, Douglas Hull Jennings
  • Patent number: 8650912
    Abstract: A method for manufacturing quartz glass using a main burner having a multi-tube assembly having a center tube, a first enclosure tube surrounding the center tube, a second enclosure tube surrounding the first enclosure tube, a tubular shell surrounding the multi-tube assembly, and a plurality of nozzles disposed within the tubular shell, a double-tube assembly surrounding at least a forward opening of the main burner includes feeding silica-forming compound to the center tube, a combustion-supporting gas to the first enclosure tube and the nozzles, a combustible gas to the second enclosure tube and the tubular shell, and a combustion-supporting gas to the double-tube assembly, forming oxyhydrogen flame for hydrolyzing or decomposing the silica-forming compound to form silica, depositing the silica on the target, and melting and vitrifying the deposited silica into quartz glass.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: February 18, 2014
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hisatoshi Otsuka, Kazuo Shirota
  • Patent number: 8635889
    Abstract: A known refraction-sensitive optical fiber comprises a core zone with an index of refraction nK, a jacket zone surrounding the core zone, said jacket zone having an index of refraction nM, and an annular zone made of quartz glass doped with fluorine, said annular zone surrounding the jacket zone and having an index of refraction nF, where nF<nM<nK. With this as a starting point, an optical fiber is to be provided that is characterized by high refraction-sensitivity, good spliceability and compatibility, and a method is to be provided for cost-effective manufacture of such a fiber. With regard to the method, this object is accomplished according to the invention in that the quartz glass of the annular zone (21) is produced in a plasma deposition process on the outside in which an annular zonal layer made of the quartz glass doped with fluorine is produced on a substrate body (20), said layer having a layer thickness of at least 1 mm and an index of refraction nF<1.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: January 28, 2014
    Assignee: Heraeus Quarzglas GmbH & Co. KG
    Inventors: Jan Vydra, Peter Bauer, Karsten Braeuer, Michael Huenermann
  • Patent number: 8635888
    Abstract: A deposition system for depositing a chemical vapor onto a workpiece is disclosed, including a deposition chamber having a plurality of components for performing chemical vapor deposition on the workpiece. The deposition chamber includes an inner skin made of Hasteloy for sealing the plurality of components and the workpiece from the air surrounding the deposition system, and an outer skin that encloses the inner skin and is separated from the inner skin by an air gap. The outer skin includes vents that create a convection current in the air gap between the inner skin and outer skin of the deposition chamber. The deposition system also has a gas panel for regulating the flow of gases and vapors into the deposition chamber, and a computer for controlling operation of the gas panel and the components in the deposition chamber.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: January 28, 2014
    Inventors: Franklin W Dabby, Bedros Orchanian
  • Patent number: 8635886
    Abstract: It is an object of the present invention to provide a copper-containing silica glass which emits fluorescence having a peak in a wavelength range of from 520 nm to 580 nm under irradiation of ultraviolet light with a wavelength of 400 nm or less, and which is excellent in long term stability even in the high output use. The copper-containing silica glass is made to have copper of from 5 wtppm to 200 wtppm, which emits fluorescence having a peak in a wavelength range of from 520 nm to 580 nm under irradiation of ultraviolet light with a wavelength ranging from 160 nm to 400 nm, and in which an internal transmittance per 2.5 mm thickness at a wavelength of 530 nm is 95% or more.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: January 28, 2014
    Assignees: Shin-Etsu Quartz Products Co., Ltd., Opto-Electronics Laboratory, Inc.
    Inventors: Tetsuji Ueda, Michinari Ohuchi, Hiroyuki Nishimura, Akira Fujinoki, Masahiro Nakatsuka, Hidetsugu Yoshida
  • Patent number: 8590344
    Abstract: The invention relates to a known method for the production of a cylinder from quartz glass, comprising a step, wherein an SiO2 body which comprises a porous SiO2 soot layer and has a lower end, an upper end, and an outer casing, is sintered to form said quartz glass cylinder in a vitrification furnace, and is being held in a vertical orientation by means of a retaining device, which comprises an upper retaining element connected at the upper end of the SiO2 body, and a lower retaining element disposed on the lower end. In order to provide a method based thereon, by means of which even heavy bodies made of porous SiO2 can be safely retained during vitrification, the invention provides that the retaining device has a dimensionally stable connecting part, which extends inside the vitrification furnace along the outer casing of the SiO2 body and which connects the upper and the lower retaining elements to each other.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: November 26, 2013
    Assignee: Heraeus Quarzglas GmbH & Co. KG
    Inventors: Thomas Krause, Udo Peper, Steffen Zwarg, René Sowa
  • Patent number: 8578736
    Abstract: A method and apparatus for making an optical fiber preform. The apparatus has an outer wall and an inner wall. The outer wall surrounds the inner wall and the inner wall surrounds an inner cavity of the apparatus. A consolidated glass rod is deposited in the inner cavity after which particulate glass material, such as glass soot, is deposited in the inner cavity around the glass rod. A radially inward pressure is applied against the particulate glass material to pressurize the particulate glass material against the glass rod.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: November 12, 2013
    Assignee: Corning Incorporated
    Inventors: Steven Bruce Dawes, Douglas H Jennings, Nicolas LeBlond, Christopher Scott Thomas
  • Patent number: 8567217
    Abstract: A method for manufacturing an optical fiber preform includes a process A of applying flame polishing to a center glass rod, a process B of determining a ratio ra/rb, which is a ratio of a radius ra of the center glass rod expressed in millimeters with respect to a radius rb of a target optical fiber preform expressed in millimeters, based on a refractive index profile of a target optical fiber preform, and a process C of determining an amount of fine glass particles to be deposited on the center glass rod so that a ratio ra/rb/c falls within a range from 0.002 to 0.01, where “c” is a maximum value of hydroxyl group concentration expressed in ppm in the vicinity of a boundary between the center glass rod and an outer layer, which is formed by depositing fine glass particles on the center rod and by being vitrified.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: October 29, 2013
    Assignee: FUJIKURA Ltd.
    Inventors: Takakazu Gotoh, Naritoshi Yamada
  • Patent number: 8544299
    Abstract: To improve a known method for making a quartz glass tube as a semifinished product for the manufacture of optical fibers, the tube comprising an inner fluorine-doped quartz glass layer and an outer quartz glass layer, so as to achieve inexpensive manufacture and improved dimensional stability of the quartz glass tube, it is suggested according to the invention that the quartz glass of the inner layer should be produced in a first plasma deposition process with formation of an inner layer having a wall thickness of at least 1.5 mm, with a fluorine content of at least 1.5% by wt. being set in the quartz glass, and that the quartz glass of the outer layer should be produced in a second plasma deposition process and deposited directly or indirectly on the inner layer with formation of a composite tube, and that the composite tube should be elongated into the quartz glass tube.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: October 1, 2013
    Assignee: Heraeus Quarzglas GmbH & Co. KG
    Inventors: Gerhard Schoetz, Karsten Braeuer, Jan Vydra
  • Patent number: 8516855
    Abstract: A method for producing an optical fiber preform. Glass soot particles are formed by jetting and combusting a gaseous glass-forming material and a fuel gas from a burner in the presence of oxygen. The glass soot particles are deposited on a deposition rod while rotating the deposition rod about its axis and reciprocating the burner in parallel to the deposition rod so as to form the preform and varying at least one of the translation velocity of the burner and the rotation velocity of the rod so as to obtain a predetermined radial soot density distribution in the preform.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: August 27, 2013
    Assignee: Prysmian Cavi E Sistemi Energia S.R.L.
    Inventors: Sabrina Fogliani, Carlo Tregambe
  • Patent number: 8464557
    Abstract: A method of producing an optical fiber preform includes preparing a glass preform that has a hole extending in a longitudinal direction formed on one end of the glass preform in such a manner that a length of the hole is equal to or less than half of an entire length of the glass preform, synthesizing a porous glass preform by depositing glass particles on an outer circumference of the glass preform having the hole formed on the end, and sintering the porous glass preform after arranging the porous glass preform in such a manner that the end having the hole formed thereon points downward and the hole is open to the air.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: June 18, 2013
    Assignee: Furukawa Electric Co., Ltd.
    Inventors: Taeko Shibuta, Tadashi Takahashi, Takeshi Yagi
  • Patent number: 8464556
    Abstract: Method of making a microstructured optical fiber. Silica glass based soot is deposited on a substrate to form at least a portion of an optical fiber preform by traversing a soot deposition burner with respect to said substrate at a burner traverse rate greater than 3 cm/sec, thereby depositing a layer of soot having a thickness less than 20 microns for each of a plurality of burner passes. At least a portion of the soot preform is then consolidated inside a furnace to remove greater than 50 percent of the air trapped in said soot preform, said consolidating taking place in a gaseous atmosphere containing krypton, nitrogen, or mixtures thereof under conditions which are effective to trap a portion of said gaseous atmosphere in said preform during said consolidation step, thereby forming a consolidated preform which when viewed in cross section will exhibit at least 50 voids therein.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: June 18, 2013
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Robert Brett Desorcie, Mark Alan McDermott, Pushkar Tandon
  • Patent number: 8459063
    Abstract: A multi-nozzle type burner is used for producing a porous glass preform, the burner having small variations in deposition efficiency with the burner tip being not burned even when axial shift occurs at the concentric multi-tube part of the burner. The present invention provides a burner for producing a porous glass preform with a concentric multi-tube structure, comprising a glass material gas jet port in a center, a plurality of gas jet ports concentrically disposed outside the glass material gas jet port, and small-diameter gas jet ports which are disposed in a line or a plurality of lines concentrically to the glass material gas jet port so as to be enclosed in one of the gas jet ports other than the gas jet ports in the center and at an outermost side, the small-diameter gas jet ports in the same line having an identical focal length.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: June 11, 2013
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventor: Makoto Yoshida
  • Publication number: 20130139554
    Abstract: The present invention provides a method for producing a glass preform capable of improving the deposition efficiency of produced glass fine particles to a starting rod or a glass soot body. The method for manufacturing a glass preform includes controlling the temperature of SiCl4 used as a source gas to 100° C. or more, producing glass fine particles having an average outer diameter of 90 nm or more in a flame of a burner for producing glass fine particles, and depositing the glass fine particles on a starting glass rod 13.
    Type: Application
    Filed: August 24, 2011
    Publication date: June 6, 2013
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Tomohiro Ishihara
  • Publication number: 20130133375
    Abstract: A method for producing synthetic quartz glass comprises providing a liquid SiO2 feedstock material containing octamethylcyclotetrasiloxane D4, vaporizing the SiO2 feedstock material into vapor, converting the vapor into SiO2 particles, depositing the particles to form a porous SiO2 soot body, and vitrifying the soot body, forming the synthetic quartz glass. To produce cylindrical soot bodies with outer diameters above 300 mm and improved material homogeneity, the liquid feedstock material contains additional components comprising hexamethylcyclotrisiloxane D3 and the linear homolog thereof with a weight fraction mD3, decamethylcyclohexasiloxane D6 and the linear homolog thereof with a weight fraction mD6, and tetradecamethylcycloheptasiloxane D7 and/or hexadecamethylcyclooctasiloxane D8 and the linear homologs thereof with a weight fraction mD7+, wherein the weight ratio mD3/mD6 is between 0.5 and 500 and the weight fraction mD7+ is at least 20 wt. ppm.
    Type: Application
    Filed: November 23, 2012
    Publication date: May 30, 2013
    Applicant: Heraeus Quarzglas GmbH & Co. KG
    Inventors: Heinz Fabian, Juergen Roeper
  • Publication number: 20130133378
    Abstract: A known method for producing synthetic quartz glass comprises the method steps: providing a liquid SiO2 feedstock material, which contains octamethylcyclotetrasiloxane D4 as the main component, vaporizing the SiO2 feedstock material into a feedstock material vapor, converting the feedstock material vapor into SiO2 particles, depositing the SiO2 particles on a deposition surface while forming a porous SiO2 soot body, and vitrifying the SiO2 soot body while forming the synthetic quartz glass.
    Type: Application
    Filed: November 23, 2012
    Publication date: May 30, 2013
    Applicant: HERAEUS QUARZGLAS GMBH & CO. KG
    Inventor: Heinz Fabian