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| Number | Title | Issue Date |
| 7891217 | Method of producing an optical fiber preform Glass can be synthesized and deposited at a high rate by the inside CVD method using a plasma burner in a manner such that unconsolidated portions or bubbles are little generated. The method includes a step of depositing a glass film on the inner wall surface of a s... | 02/22/2011 |
| 7241629 | Detectable labels, methods of manufacture and use Labels, methods of making labels and methods of using labels are disclosed. The labels can be manufactured using fiber drawing techniques or by shutter masking. The labels can be used for detecting the presence of an analyte in a sample and for detecting interaction... | 07/10/2007 |
| 7198820 | Deposition of carbon- and transition metal-containing thin films A process depositing a carbon- and transition metal-containing thin film on a substrate involves placing a substrate within a reaction space and sequentially pulsing into the reaction space a transition metal chemical and an organometallic chemical. Following each c... | 04/03/2007 |
| 7130513 | Glass-body-producing method and optical glass body and optical fiber A method produces a glass body that contains a reduced amount of OH groups in the metallic-oxide-containing glass layer and that has a reduced amount of transmission loss due to OH groups when the glass body is transformed into an optical fiber. The production metho... | 10/31/2006 |
| 7116877 | Method of manufacturing an optical fibre suitable for high transmission rates The present invention relates to a method of manufacturing an optical fibre suitable for high transmission rates, which method comprises: i) supplying one or more glass forming precursors, and possibly a dopant, to a quartz substrate tube, ii) forming a plasma in th... | 10/03/2006 |
| 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 |
| 7069749 | Method of manufacturing a solid preform The present invention relates to a method of manufacturing a solid preform by moving a heat source parallel to the longitudinal axis of a substrate tube, whose inner surface is coated with one or more doped or undoped glass layers, so as to collapse the substrate tu... | 07/04/2006 |
| 7058269 | Reconstructed glass for fiber optic applications The present invention concerns a preform for an optical fiber, an optical fiber so obtained and methods for making the same. The fiber is characterized in that porous glass doped with at least one dopant is used. Resulting fibers can be used to make high attenuation... | 06/06/2006 |
| 7003984 | Hybrid manufacturing process for optical fibers A hybrid method of and apparatus for producing a structure capable of being drawn into an optical fiber. The method includes the steps of conducting vapor-phase reactants into an interior region of a glass tube, conducting aerosol form reactants into the interior of... | 02/28/2006 |
| 6630029 | Fiber coating method and reactor In a method of coating a CMC fiber, the fiber is passed through a reaction zone along a path substantially parallel to a longitudinal axis of the zone, a flow of fiber coating reactant is passed though the reaction zone, at least a portion of the flow of ... | 10/07/2003 |
| 6604388 | Solid state glass constituent delivery system A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low n... | 08/12/2003 |
| 6532774 | Method of providing a high level of rare earth concentrations in glass fiber preforms A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low n... | 03/18/2003 |
| 6510710 | Multi-tube delivery system A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low n... | 01/28/2003 |
| 6490889 | Method of forming a glass preform A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low n... | 12/10/2002 |
| 6467313 | Method for controlling dopant profiles The present invention discloses novel methods for fabricating glass articles, particularly optical fiber glass preforms, which may contain alumina, yttrium, lanthanum, erbium, or other rare earth metals as dopants. The glass articles made in accordance wi... | 10/22/2002 |
| 6430967 | Pressure monitoring system using disposable seals A pressure monitoring system for use in monitoring gas pressure within a rotating tube has a chemical delivery tube which projects into the rotating tube and whose distal end is sealed to the interior wall of the tube. A coaxial tube surrounds the deliver... | 08/13/2002 |
| 6363754 | MCVD method and apparatus using an elongated gas feeding device An apparatus for manufacturing optical fibers includes an external circular tube into which reactant gases are introduced from an entrance at one end thereof. An internal circular tube is inserted into the external circular tube through an exit at the oth... | 04/02/2002 |
| 6363746 | Method and apparatus for making multi-component glass soot An apparatus for producing the glass soot used in the formation of optical fiber includes a burner with an internal atomizer. The atomizer includes an outer tube having a nozzle at an end thereof, and an inner tube located within the outer tube and having... | 04/02/2002 |
| 6192713 | Apparatus for the manufacture of glass preforms A method and apparatus is disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low nu... | 02/27/2001 |
| 5106400 | Casting core/clad glass preforms method and apparatus Disclosed is a method of forming a glass preform from core and cladding glasses having low liquidus viscosities and narrow working ranges. A tube of liquid core glass is vertically situated in a vessel of liquid cladding glass. The tube extends to the bot... | 04/21/1992 |
| 5059230 | Fabrication of doped filament optical fibers Reproducible doped optical fiber preforms having a predetermined dopant concentration level are fabricated by inserting a doped filament into a completed preform prior to consolidation and final collapse so that the filament and dopant materials are centr... | 10/22/1991 |
| 5047076 | Method of fabricating optical fibres by solution-doping Silica intended to form the core of an optical-fibre preform is deposited as an unvitrified soot inside a reaction tube, where a non-aqueous solution of dopant precursor(s) is then introduced without removing the tube from the lathe. The precursor(s) of t... | 09/10/1991 |
| 4826288 | Method for fabricating optical fibers having cores with high rare earth content A chemical vapor deposition method which utilizes a rare earth chelate vapor as a source of rare earth ions for producing an optical fiber having a core with a high rare earth content.... | 05/02/1989 |
| 4799946 | Preparation of glass fibre Rare earth elements, e.g. Nd, are introduced into optical glass fibre for telecommunications by evaporating a suitable salt, e.g. NdCl3, from a glass sponge into the gas stream used to deposit core material. Preferred sponges are in the form of... | 01/24/1989 |
| 4770682 | Device for manufacturing optical fiber preforms In the P.C.V.D. process in principal the quartz tube need not be rotated during the deposition of the glass layers. However it has been found in practice that an improvement in the quality of the glass fibers can be obtained if the quartz tube is rotated ... | 09/13/1988 |
| 4728350 | Process and apparatus for producing optical-fiber preforms for mid-infrared range fibers The process employs solid-state halides heated at high temperature, under pressure conditions necessary to their vaporization, and obtains their condensation to a solid state on the internal surface of a glass tube, which, after collapsing, forms the pref... | 03/01/1988 |
| 4666247 | Multiconstituent optical fiber Silica-based optical fiber comprising at least a core and a cladding surrounding the core, both core and cladding material produced by a vapor phase deposition process. The core and/or the cladding comprise at least two substituents, one chosen from Li, N... | 05/19/1987 |
| 4616901 | Doped optical fiber Optical fibers doped with nonglass forming refractory oxides, such as alumina and zirconia, are disclosed. Devitrification is retarded by adding an additional glass forming component, such as P2 O5, and by rapidly quenching the heate... | 10/14/1986 |
| 4457770 | Method and apparatus for the production of optical fibers with lateral gaseous injection The invention relates to an apparatus for producing a preform for constituting an optical fiber. This apparatus essentially comprises a glass maker's lathe and a motor which holds and rotates a hollow silica tube, a torch making it possible to heat a cros... | 07/03/1984 |
| 4412853 | Method of making optical waveguide fiber preform starter tubes A glass tube is formed having a mean cross-sectional tube wall area less than a preselected mean cross-sectional area. Additional glass differing in composition from that of the glass tube, but having an index of refraction substantially equal to that of ... | 11/01/1983 |
| 4402720 | Process for preparing glass preform for optical fiber A process for producing a glass perform for optical transmission fibers, which includes supplying a gaseous silicon compound, ammonia or a gaseous nitrogen compound, and an oxygen-containing gas as starting gases into a high temperature zone to produce fi... | 09/06/1983 |
| 4389229 | Methods and apparatus for fabricating a lightguide preform Undeposited reactants (i.e., soot) passing through a glass substrate tube (12), during the fabrication of a lightguide perform by the Modified Chemical Vapor Deposition (MCVD) process, flow into a reactant exhaust system (50) and are carried therethrough ... | 06/21/1983 |
| 4378987 | Low temperature method for making optical fibers A glass optical waveguide preform is formed by chemical reaction of gaseous and/or vaporized ingredients within a glass substrate tube. A reactant feed tube extends into a first end of the substrate tube. One of the reactants flows through the feed tube, ... | 04/05/1983 |
| 4341441 | Method of making solid preforms and optical fibers drawn therefrom An optical glass fiber is formed of an inner layer of germania doped glass within the bore of the outer cladding tube of silica. The tube with the higher index of refraction inner layer is rotated while being heated to collapse the bore to form an optical... | 07/27/1982 |
| 4312654 | Method and apparatus for making large diameter optical waveguide preforms A glass optical waveguide filament preform is prepared by chemical reaction of vapor ingredients within a glass bait tube. As the reactants flow through the bait tube, a hot zone traverses the tube to cause the deposition of sooty reaction products in the... | 01/26/1982 |
| 4310340 | Method and apparatus for making optical fiber waveguides A glass optical waveguide preform is prepared by chemical reaction of vapor ingredients within a bait tube. As the reactants flow through the bait tube, a hot zone traverses the tube to cause the deposition of soot in a section of the tube just downstream... | 01/12/1982 |
| 4278459 | Method and apparatus for exhausting optical fiber preform tubes Methods and apparatuses are disclosed for exhausting reaction products from an optical fiber preform tube and for choking off the preform tube during collapse wherein an exhaust tube (40) is provided with an entry end (41) located adjacent and in fluid co... | 07/14/1981 |
| 4235616 | Optical waveguide manufacturing process and article A method of forming a preform or blank for an optical filament, the preform itself, and resulting optical filament is disclosed. A hollow cylindrical substrate is provided within which is disposed a burner having a substantially radial flame. Reactants ar... | 11/25/1980 |
| 4233045 | Apparatus and method for making optical filament preform A glass optical waveguide filament preform is prepared by chemical reaction of vapor ingredients within a glass bait tube. A reactant feed tube extends into one end of the bait tube and terminates just short of the hot zone where reaction occurs. The end ... | 11/11/1980 |
| 4117802 | Method and device for depositing a layer of glass on the inner wall of a tube A reactive gaseous mixture which reacts in a localized heating zone to form a glass deposit on the inner wall of a tube is made to flow along the tube, and in the heating zone it is channelled around a cylindrical element which occupies much of the bore o... | 10/03/1978 |
