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| Number | Title | Issue Date |
| 7908888 | Process for producing a low-attenuation optical fiber A process for producing a low-attenuation optical fiber by producing a soot core preform by chemical deposition on a substrate; removing the substrate from the soot core preform, thereby forming a central hole along the soot preform; drying and consolidating the soo... | 03/22/2011 |
| 7552601 | Optical component of quartz glass, method for producing the optical component, and use thereof Starting from an optical component of quartz glass for transmitting ultraviolet radiation of a wavelength between 190 nm and 250 nm, with a glass structure essentially without oxygen defects, a hydrogen content ranging from 0.1×1016 molecules/cm3 | 06/30/2009 |
| 7404302 | Method of depositing glass soot A method for deposition glass soot for making an optical fiber preform. A fuel and a glass precursor are flowed to a burner flame forming glass soot which is deposited onto a glass target. By first depositing an insulating layer of glass soot with a low velocity bur... | 07/29/2008 |
| 7387000 | Method of producing a hollow glass cylinder with suspension during sintering The invention relates to a method for producing a silica glass tube which is characterized by depositing SiO2 particles on an elongate support that rotates about its longitudinal axis, thereby producing a porous with a cylindrical inner bore. Said blank i... | 06/17/2008 |
| RE39535 | Method of making fused silica by decomposing siloxanes This invention relates to the production of high purity fused silica glass through oxidation or flame hydrolysis of a vaporizable silicon-containing compound. More particularly, this invention is directed to the use of vaporizable, halide-free compounds in said prod... | 04/03/2007 |
| 7089766 | Method of forming optical fiber preforms Methods, apparatus and precursors for producing substantially water-free silica soot, preforms and glass. The methods and apparatus make substantially water-free fused silica preforms or glass by removing water as a reaction product, removing water from the atmosphe... | 08/15/2006 |
| 7089765 | Method of making a jacketed preform for optical fibers using OVD On the basis of a known process for the production of a preform for an optical fiber for optical data transmission technology, the productivity of the process for the production of complex refractive index profiles is to be improved by providing a quartz glass subst... | 08/15/2006 |
| 6938443 | Method for the manufacture of a quartz glass preform for an optical fiber The invention relates to a method for manufacture of a quartz glass preform for an optical fibre consisting of the following steps: preparation of a hollow cylinder made of porous quartz glass which exhibits an inner layer with a doping substance which increases the... | 09/06/2005 |
| 6935050 | Method and apparatus reducing metal impurities in optical fiber soot preforms A method and apparatus for producing an optical fiber preform including a metal remover, which operates by adsorption, that removes gaseous transition metal impurities present in a process gas to be provided to a furnace for drying, doping or consolidation. The appa... | 08/30/2005 |
| 6904772 | Method of making a glass preform for low water peak optical fiber Optical waveguide fiber having low water peak as well as optical waveguide fiber preforms and methods of making optical waveguide fiber preforms from which low water peak and/or low hydrogen aged attenuation optical waveguide fibers are formed, including optical wav... | 06/14/2005 |
| 6889529 | Method of manufacturing optical fiber preform A method for producing an optical fiber preform is provided in which the variation of the outer diameter in the longitudinal direction is minimized and a target quantity of glass is accumulated as a whole. Based on a predetermined relationship between three variable... | 05/10/2005 |
| 6843076 | Single step laydown method of making dry fiber with complex fluorine doped profile A method of making an optical waveguide preform includes forming a preform including a first portion and a second radial portion, wherein the second portion includes a dopant, and wherein the first portion exhibits a density greater than the second portion. The meth... | 01/18/2005 |
| 6817213 | Method of fabricating optical fiber preform and method of fabricating optical fiber Methods of fabricating an optical fiber preform and a method of fabricating an optical fiber of the invention realize the fabrication of an optical fiber having desirable transmission characteristics in the entire wavelength rage of about 1.3 to 1.6 μm. The fabrica... | 11/16/2004 |
| 6776012 | Method of making an optical fiber using preform dehydration in an environment of chlorine-containing gas, fluorine-containing gases and carbon monoxide Embodiments of the invention include a method for making optical fiber having reduced aging or hydrogen aging loss over the life of the fiber and optical fiber systems including such optical fibers. The method includes the steps of dehydrating an optical fiber glass... | 08/17/2004 |
| 6698249 | Porous glass base material production device and method An object of the present invention is to reduce the adhesion of floating glass particulates to the surface of a soot preform during the manufacture of the soot preform, thereby reducing the voids generated in the transparent glass preform made from the so... | 03/02/2004 |
| 6672109 | Silica glass member, method for producing the same, and projection aligners using the same A silica glass member for use with a light having a specific wavelength of 250 nm or shorter, in which the difference in the maximum and the minimum values of hydroxyl group concentration as measured in a plurality of points within a plane vertical to an ... | 01/06/2004 |
| 6631628 | Method of purifying natural or synthetic silica, and application thereof to depositing purified natural or synthetic silica on an optical fiber preform Natural or synthetic silica is deposited on a preform set into rotation in front of a plasma torch which moves back and forth substantially parallel to a longitudinal direction of the preform, a first feed duct feeds the plasma with grains of natural or s... | 10/14/2003 |
| 6508084 | Method for producing optical quartz glass for excimer lasers and vertical-type heating furnace A method for producing an optical quartz glass for use in excimer lasers, comprising a step of forming a porous silica preform by depositing silica in a soot-like form formed by flame hydrolysis of a high-purity volatile silicon compound, followed by a st... | 01/21/2003 |
| 6477864 | Method of purifying natural or synthetic silica, and application thereof to depositing purified natural or synthetic silica on an optical fiber preform Natural or synthetic silica is deposited on a preform set into rotation in front of a plasma torch which moves back and forth substantially parallel to a longitudinal direction of the preform, a first feed duct feeds the plasma with grains of natural or s... | 11/12/2002 |
| 6477305 | Low water peak optical waveguide and method of manufacturing same A cylindrical glass body having a low water content centerline region and method of manufacturing such a cylindrical glass body for use in the manufacture of optical waveguide fiber is disclosed. The centerline region of the cylindrical glass body has a w... | 11/05/2002 |
| 6438999 | Decreased H2 sensitivity in optical fiber Disclosed is a method of making a hydrogen resistant optical waveguide fiber. The soot preform is heated and then immersed in a GeCl4 gas. A reduced metal species is thus incorporated into the glass soot prior to sintering or consolidation of the soot pre... | 08/27/2002 |
| 6374639 | Silica glass and its manufacturing method A method is provided for manufacturing a silica glass that is substantially free of chlorine. The method includes the step of separately expelling a silicon tetrafluoride gas, a combustion gas, and a combustible gas from a burner made of silica glass, the... | 04/23/2002 |
| 6309991 | Silica with low compaction under high energy irradiation Fused silica stepper lens for photolithographic application are disclosed which are resistant to laser-induced damage, specifically, compaction or densification which can lead to an increase in the optical path length of the lens. The figure compares the ... | 10/30/2001 |
| 6306500 | Porous optical fiber base materials, optical fiber base materials and methods for producing them There is disclosed a method for producing a porous optical fiber base material comprising depositing fine glass powder on a rotating member, wherein pore size of the deposited fine glass powder is controlled, and preferably, mode of the pore size is contr... | 10/23/2001 |
| 6295843 | Method of making a single-mode optical fiber with multiple concentric core portions by using an outside vapor deposition process The present invention relates to a single-mode optical fiber having a configuration which enables lowering of dispersion slope while securing a sufficient MFD. This single-mode optical fiber has a refractive index profile in which an indent with a suffici... | 10/02/2001 |
| 6189342 | Method of making segmented core optical waveguide preforms A method of making a segmented core optical waveguide preform for making fiber that is resistant to attenuation increases due to hydrogen and heat aging. A first core region comprising a silica glass rod containing at least a first dopant is inserted into... | 02/20/2001 |
| 6189340 | Process for forming a titania-containing preform silica glass blank Disclosed is an optical waveguide fiber having a compressive outer layer that includes TiO2 in the SiO2 matrix glass. The compressive outer layer includes crystalline structures containing TiO2 that are predominately rutil... | 02/20/2001 |
| 6128928 | Optical fiber resistant to hydrogen-induced attenuation Improved single-mode optical waveguide fibers having a central core region, surrounded by an inner cladding region through which light at a chosen signal wavelength will propagate to an appreciable degree along with propagation of same in the central core... | 10/10/2000 |
| 6116055 | Method of making synthetic silica glass Disclosed is a synthetic silica-glass fabricating method in which the doping of chlorine into silica glass made by using a flame hydrolysis or thermal oxidation is increased. The process comprises the steps of producing a porous deposit of silica-glass pa... | 09/12/2000 |
| 5958102 | Apparatus and method for making an optical fiber preform using a correction pass A method for making an optical fiber preform comprises depositing fine particles of glass serving as a dad on the surfaces of a rod-shaped core over a given length of the rod-shaped core by use of a plurality of oxyhydrogen flame burner units, detecting a... | 09/28/1999 |
| 5656057 | Method for drying and sintering an optical fiber preform The invention relates to a method of drying and sintering porous optical fiber preforms, especially those consisting of a solid glass core cane surrounded by a layer of cladding soot. After it is dried in a dehydrating atmosphere, the porous preform is he... | 08/12/1997 |
| 5609666 | Process of producing preforms for silica glass optical waveguides while flowing gas through a tubular substrate During the gradual build-up of porous quartz glass by the combustion of a hydrolysis gas mixture and preferably for a certain period of time thereafter, a drying gas mixture is conducted under positive pressure through the porous tubular deposit from the ... | 03/11/1997 |
| 5185020 | Method for manufacturing a silica-base material for optical fiber A silica-based glass rod is inserted into a space portion of a mold. Then, a slurry, which is obtained by dispersing a silica glass powder material in pure water, is poured into a molding space between the glass rod and the inner surface of the mold, wher... | 02/09/1993 |
| 5180411 | Optical waveguide fiber with titania-silica outer cladding and method of manufacturing A method of making an optical waveguide fiber with a fatigue resistant TiO2 -SiO2 outer cladding, and a substantially glass blank for drawing into such fiber, wherein a glass soot TiO2 -SiO2 outermost layer, wit... | 01/19/1993 |
| 5152819 | Method of making fused silica This invention relates to the production of high purity fused silica glass through oxidation and/or flame hydrolysis of a halide-free, organosilicon-R compound in vapor form having the following properties: (a) producing a gas stream of a halide-free silicon-c... | 10/06/1992 |
| 5043002 | Method of making fused silica by decomposing siloxanes This invention relates to the production of high purity fused silica glass through oxidation or flame hydrolysis of a vaporizable silicon-containing compound. More particularly, this invention is directed to the use of vaporizable, halide-free compounds i... | 08/27/1991 |
| 5017209 | High temperature furnace with thermal insulation A furnace comprising a cylindrical heater and a cylindrical insulation around the heater, wherein the insulation has anisotropy in heat transfer and a direction along which the thermal conductivity of the insulation is small corresponds to a direction alo... | 05/21/1991 |
| 5009692 | Method of making fiber optic coupler A fiber optic coupler is formed by providing a glass tube having a longitudinal aperture. Glass optical fibers, each having a core, cladding and coating are disposed within the longitudinal aperture, the fibers extending beyond each end of the tube. The c... | 04/23/1991 |
| 4935045 | Method of manufacturing a preform for asymmetrical optical fiber Disclosed is a method of manufacturing a preform for an asymmetric optical fiber which comprises the steps of (a) fixing plural transparent glass rods involving at least one core-mother rod functioning as the core in said optical fiber in parallel relatio... | 06/19/1990 |
| 4846867 | Method for producing glass preform for optical fiber A method for producing a glass preform for use in the fabrication of an optical fiber which comprises inserting a core rod made of quartz glass in a cladding tube made of quartz glass added with fluorine, heating them from the outside of the cladding tube... | 07/11/1989 |
