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| Number | Title | Issue Date |
| 7363776 | Method for forming fused quartz using deuterium A silica deposition tube is fused in a deuterium (D2) gas atmosphere and optionally baked in a deuterium (D2) gas atmosphere to substantially reduce the hydrogen content in the tube for decreased fiber attenuation. Alternatively, raw silica mat... | 04/29/2008 |
| 7277619 | Nano-imprinted photonic crystal waveguide This invention relates to a method for forming a nano-imprinted photonic crystal waveguide, comprising the steps of: preparing an optical film on a substrate; preparing a template having a plurality of protrusions of less than 500 nm in length such that the protrusi... | 10/02/2007 |
| 7268927 | Tunable optical filter array and method of use According to an exemplary embodiment of the present invention, an optical apparatus includes an optical filter array which comprises a plurality of optical filter elements, wherein at least one of the optical filter elements is adapted for tuning to two or more wave... | 09/11/2007 |
| 7221448 | Test cell for a noble gas polarizer The invention relates to a sample cell with a glass body comprising a gas inlet and a gas outlet and at least one orifice, a plane glass window is fused into the orifice, the shape and size of the window corresponds to the shape and size of the orifice, the orifice ... | 05/22/2007 |
| 7197899 | Multi heating zone apparatus and process for making core/clad glass fibers A process includes the steps of disposing a solid core glass rod at a point removed from hot temperature that can cause crystallization in the core glass rod, disposing a solid clad glass rod at a point removed from the core glass rod; softening to the flowing condi... | 04/03/2007 |
| 7181116 | Fiber optic cable and process for manufacturing A preform for a low loss fiber optic cable and method and apparatus for fabricating such a preform is provided. The method includes providing AlCl3 and CVD precursors and locally doping CaCl3. Alkali and/or alkaline earth fluxing agents can be ... | 02/20/2007 |
| 7125912 | Doped sol-gel materials and method of manufacture utilizing reduced mixing temperatures A method of preparing a solution for forming a doped gel monolith includes providing a first substance including a metal alkoxide. The method further includes providing a second substance including a catalyst. The method further includes providing a chemical includi... | 10/24/2006 |
| 7121120 | Method of glazing an optical fiber preform with a plasma of reduced power A method of fabricating an optical fiber preform includes an operation of glazing the outside surface of the preform using inductive heating, of the plasma torch type, for localized heating of the preform. A flow of gas between the plasma and the preform in the area... | 10/17/2006 |
| 7111476 | Electrophoretic deposition process for making quartz glass products Cup-shaped porous silica preforms suitable for manufacture of large 24-inch crucibles used in Czochralski crystal-growing furnaces are produced by a unique electrophoretic casting process using a high-purity aqueous silica slip or slurry having a predetermined parti... | 09/26/2006 |
| 7072562 | Optical fibers made from multicomponent glass The stepped optical fiber has a core glass member and a surrounding cladding glass member. It has a high numerical aperture (NA)≧0.50. The core glass member preferably has a zinc-containing composition including, in % by weight, SiO2, 42 to 53; ZnO, 16 ... | 07/04/2006 |
| 7062135 | Method for fabricating curved elements The present invention provides methods for forming convex and concave elements on the ends of supporting members. A convex element may be formed by forming a droplet on the end of the supporting member, then curing the droplet. The size of the droplet may be control... | 06/13/2006 |
| 7026362 | Sol-gel process utilizing reduced mixing temperatures A method of forming a gel monolith includes preparing a first solution comprising metal alkoxide and preparing a second solution comprising a catalyst. A third solution is prepared by mixing the first solution and the second solution together. At least one of the fi... | 04/11/2006 |
| 7021083 | Manufacture of high purity glass tubes A glass tube for use in an optical fiber preform is produced by applying a first soot on an end face of a starting member to form an elongated, porous cylindrical soot core having a first density, and applying a second soot including SiO2 on the periphery... | 04/04/2006 |
| 7003983 | Method of manufacturing optical glass element, and optical glass element manufactured using the method A method of manufacturing an optical glass element for which flatness and smoothness of the surfaces of the optical glass element can be improved while securing the similarity of the cross-sectional shape of the optical glass element to that of the mother glass, and... | 02/28/2006 |
| 6970630 | Fiber optic cable and process for manufacturing A preform for a low loss fiber optic cable and method and apparatus for fabricating such a preform is provided. The method includes providing AlCl3 and CVD precursors and locally doping CaCl3. Alkali and/or alkaline earth fluxing agents can be ... | 11/29/2005 |
| 6938442 | Method for elongating a cylinder of silica glass According to a prior art method for producing a cylindrical component comprised of silica glass, a cylinder comprised of a softened silica glass mass is drawn in a predetermined drawing direction along a drawing axis by means of a drawing device which acts upon said... | 09/06/2005 |
| 6928220 | Sol-gel-derived optical fiber preform and method of manufacture A method forms an optical fiber preform. The method includes forming a sol-gel-derived rod having a first diameter. Forming the sol-gel-derived rod includes preparing a sol-gel solution including at least 3 mole % of a catalyst. The sol-gel solution is allowed to un... | 08/09/2005 |
| 6912073 | Optical filter array and method of use In accordance with an exemplary embodiment of the present invention, an optical apparatus includes a glass monolithic structure including a plurality of optical filter elements, and the glass monolithic structure is not an optical fiber. In accordance with another e... | 06/28/2005 |
| 6844279 | Optical glass, press-molding preform and optical part A high-refractivity low-dispersion optical glass that gives press-molding preforms excellent in high-temperature shapability and suitable for precision press-molding, including an optical glass comprising B2O3, La2O3, Gd | 01/18/2005 |
| 6789398 | Mold incorporating a heat source and apparatus and method for using such molds A heat source is formed within one piece of a multi-piece mold designed to shape a glass tube. The one piece of the mold can then be used as a source of intense heat to render the glass malleable and to also contribute to shaping the tube in conformance with the mol... | 09/14/2004 |
| 6779363 | Method for pregobbing an optical fiber preform and system producing optical fiber therefrom A method for the pregobbing of an optical fiber preform to provide pre-optimized tip taper and system for drawing optical fiber therefrom. The downtime of an optical fiber drawing apparatus can be considerably shortened, by providing preforms that have a pre-optimiz... | 08/24/2004 |
| 6772611 | Making a glass rod with a step of measuring an incremental weight gain The present invention provides a simple method for fabricating fiber-optic glass preforms having complex refractive index configurations and/or dopant distributions in a radial direction with a high degree of accuracy and precision. The method teaches bundling toget... | 08/10/2004 |
| 6739155 | Quartz making an elongated fused quartz article using a furnace with metal-lined walls A crucible for melting a silica for fusion of said silica into a desired shape. The crucible having a main body with inner and outer surfaces comprised of a refractory material. In addition, at least a portion of the inner surface includes a barrier layer comprised ... | 05/25/2004 |
| 6715321 | Method of fabricating an optical fiber preform including outside deposition of silica, possibly doped silica A method of fabricating an optical fiber preform is disclosed which includes a step of outside deposition of silica possibly doped with at least one dopant by injecting at least one substance in the form of silica or a precursor of silica in the vicinity of a heatin... | 04/06/2004 |
| 6564587 | Method of producing an optical fiber by gathering material from a molten bath A starting material for producing optical fibers contains metal halides. The refractive index of the optical fiber formed from the starting marterial is predeterminable by adjusting a composite of the molten bath. The starting material is produced by mixi... | 05/20/2003 |
| 6553790 | Process for fabricating optical fiber involving tuning of core diameter profile A silica-based core rod is traversed by a heat source along its longitudinal axis, to provide heated, softened regions. During the traverse, compressive or tensile movements are provided along the rod's longitudinal axis, these movements inducing, respect... | 04/29/2003 |
| 6553789 | Quartz glass plates with high refractive index homogeneity A method produces homogenous quartz glass plates without streaks. The method is applied to starting quartz glass body which has an X--X geometrical axis and good refractive index homogeneity in its central area, and a refractive index homogeneity decreasi... | 04/29/2003 |
| 6536239 | Apparatus and method for shaping glass tubes with molds A mold for shaping the end region and the opening at a selected end of a first, hollow, generally cylindrical, glass tube to enable a second tube, of smaller diameter than the first tube, to be inserted snuggly a first distance within the selected end of ... | 03/25/2003 |
| 6532776 | Method and apparatus for fusing an optical fiber preform A method for fusing an optical fiber preform comprises fusing the preform while blowing an oxidative gas against the preform to be fused from upper and lower directions of a fusing burner unit. An apparatus for carrying out the method includes a plurality... | 03/18/2003 |
| 6516636 | Method for producing a tube made of quartz glass using low internal pressure and control of diameters In a known method for the manufacture of a tube made of a vitreous material, especially of quartz glass, a hollow cylindrical semifinished product made of a vitreous material is carried essentially vertically to a heating zone, wherein it is heated and dr... | 02/11/2003 |
| 6510709 | Shaping mold optical fiber guide block processes for the production thereof and optical fiber array Disclosed are a shaping mold for producing an optical fiber guide block which permits highly accurate positioning and fixing of optical fibers, an optical fiber guide block having such excellent properties, processes for the production of these, and an op... | 01/28/2003 |
| 6474108 | Fiber preform method with a hot drill-in step for a Ge-doped tube and an F-doped rod A tube-shaped, GeO2 -doped silica glass pipe having a high refractive index is prepared (step S2), a cylindrical silica glass rod doped with F element is inserted inside the GeO2 -doped silica glass pipe (step S3), and the GeO2 | 11/05/2002 |
| 6474106 | Rare earth and alumina-doped optical fiber preform process The present invention discloses novel methods for fabricating optical fiber glass preforms which may contain alumina, germania, erbium, or other rare earth metals as dopants. Doping with a higher concentration of alumina enhances the solubility of the erb... | 11/05/2002 |
| 6467311 | Double flame polishing method for fiber preforms The optical fiber base material heat treatment method can be provided that the first flame polishing heats the surface of the optical fiber base material (106) with fixing a length of the optical fiber base material (106) and the second flame polishing he... | 10/22/2002 |
| 6434976 | Method for manufacturing glass product A manufacturing method for a glass product not having a rotatively symmetric body like an optical fiber fixing member but having a fine structure as of optical fiber engagement portions, to transfer the fine structure with a high precision without creatin... | 08/20/2002 |
| 6427491 | Method for making fibers having cores with non-circular cross-sections An optical fiber with a non-circular cross-section is realized by creating a void having the desired cross-section in a housing and filling the void with an optical material. This structure is then collapsed to solidify it and drawn to desired dimensions.... | 08/06/2002 |
| 6386001 | Optical fiber manufacture method including elongating a preform in a vertical direction and a horizontal direction A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a... | 05/14/2002 |
| 6374641 | Method of making an optical fiber by melting particulate glass in a glass cladding tube An optical article having a rare earth doped, fluorinated aluminosilicate glass core composition consisting essentially, in mole %, of: SiO2 0-90 GeO2 0-90 ... | 04/23/2002 |
| 6260388 | Method of fabricating photonic glass structures by extruding, sintering and drawing Disclosed is a method of making a photonic crystal using a combination of extruding and drawing techniques. The method is contemplated as being capable of producing both two and three dimensional crystals due to the maturity and diversity of extruding and... | 07/17/2001 |
| 6260387 | Method for fabricating glass preforms for molding optical surfaces in glass elements A method for making preforms for use in a glass lens molding process and molding lenses is disclosed. A glass rod is formed preferably by dipping a bob into a homogeneous melt of a predetermined optical glass, maintaining the temperature of the homogeneou... | 07/17/2001 |
