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| Number | Title | Issue Date |
| 8015847 | Optical fiber manufacturing, cooling and coating method An optical fiber apparatus and manufacturing method thereof includes: forming a bare optical fiber by melting and deforming an optical fiber preform; cooling the bare optical fiber after the bare optical fiber forming step by passing it through a flow channel of a c... | 09/13/2011 |
| 7946135 | Extended-baking process for glass deposition tubes Disclosed is a method of heat treating quartz glass deposition tubes at between 900° C. and 1200° C. for at least 115 hours. The resulting deposition tubes are useful in forming optical preforms that can yield optical fibers having reduced added loss. ... | 05/24/2011 |
| 7320232 | Apparatus for fabricating holey optical fiber There is provided an apparatus and method for fabricating a holey optical fiber. An optical fiber with air holes of a predetermined size and shape along the length of the optical fiber is drawn by supplying nitrogen gas into air holes through one end of a holey opti... | 01/22/2008 |
| 7312170 | Optical synthetic quartz glass and method for producing the same The present invention provides an optical synthetic quartz glass material which substantially does not cause changes in transmitted wave surface (TWS) by solarization, compaction (TWS delayed), rarefaction (TWS progressed) and photorefractive effect when ArF excimer... | 12/25/2007 |
| 7257300 | Method for reducing hydrogen sensitivity of optical fiber A method for reducing the hydrogen sensitivity of an optical fiber is disclosed. The method includes a deuterium treatment step of exposing an optical fiber to a gas mixture including a deuterium, so that the optical fiber makes a contact with the deuterium, and a d... | 08/14/2007 |
| 7143612 | Method of manufacturing glass particulate sedimentary body, and method of manufacturing glass base material To provide a method for producing a glass particle deposit and a method for producing a glass preform, in which outer diameter variation of the glass particle deposit can be reduced to thereby improve quality. A flow rate of clean gas (CG) introduced into a containe... | 12/05/2006 |
| 7076141 | Low water peak optical waveguide 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... | 07/11/2006 |
| 7022633 | Synthetic quartz glass and process for producing it A synthetic quartz glass for optical use, to be used by irradiation with light within a range of from the ultraviolet region to the vacuum ultraviolet region, which contains fluorine, which has a ratio of the scattering peak intensity of 2250 cm−1 (I | 04/04/2006 |
| 7003985 | Method and apparatus for removing polymeric coatings from optical fiber in a non-oxidizing environment In accordance with the invention, the polymeric coating is removed from a coated optical fiber by disposing the fiber within a non-oxidizing environment and applying sufficient heat to volatilize at least a portion of the polymeric coating. The result is that the co... | 02/28/2006 |
| 6945079 | Optical fiber drawing system for non-contact control of polarization mode dispersion of optical fiber Disclosed is a system for drawing an optical fiber for controlling polarization mode dispersion. A furnace is provided for uniformly heating an optical fiber preform in the drawing system mounted to an optical fiber draw tower. The furnace comprises: (a) a main body... | 09/20/2005 |
| 6935139 | Method of manufacturing optical fiber The method of manufacturing an optical fiber in accordance with the present invention comprises a step of yielding an optical fiber by drawing an optical fiber preform softened upon heating, wherein a temperature at which the optical fiber preform is softened is at ... | 08/30/2005 |
| 6928840 | Optical fiber producing method A drawing apparatus 1 comprises a drawing furnace 11, a protecting tube 21, and a resin curing unit 31. A buffer chamber 41 is disposed between the drawing furnace 11 and the protecting tube 21, and has a length L1... | 08/16/2005 |
| 6907757 | Drawing method of optical fiber and drawing furnace The drawing method of the present invention uses a drawing furnace comprising a furnace muffle tube, a furnace body and a heater. According to the method, an optical fiber preform is inserted from the inlet of the furnace muffle tube, the optical fiber preform is me... | 06/21/2005 |
| 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 |
| 6851282 | Apparatus and method for making optical fiber A drawing apparatus 1 has a drawing furnace 11, a heating furnace 21, and a resin curing section 31. The drawing furnace 11 has a muffle tube 13 to which an He gas supply passage 15 from an He gas supply section 14... | 02/08/2005 |
| 6845636 | Apparatus for dehydrating and consolidating an optical fiber preform and method of the same A dehydration and consolidation furnace and a dehydration and consolidation method in which gas in a chamber does not leak to a furnace body room and gas in a furnace body room does not leak into a chamber is provided. A furnace of one embodiment of this invention h... | 01/25/2005 |
| 6813908 | Treating an optical fiber preform with carbon monoxide The invention includes inventive methods of treating a soot preform. One method includes heating a soot preform to a temperature of less than about 1000° C. and exposing the preform to a substantially halide free reducing agent. Preferred reducing agents include ca... | 11/09/2004 |
| 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 |
| 6748767 | Drawing an optical fiber from a sol-gel preform treated with a non-oxygenated sulfur halide Fiber is drawn from a preform comprising a silica body, e.g., a sol-gel derived overcladding or substrate tube. Prior to sintering, the body is treated with a gaseous mixture containing one or more non-oxygenated sulfur halides, to remove and/or reduce the size of r... | 06/15/2004 |
| 6739157 | Method of applying a protective organic coating to an optical glass fibre The invention relates to a method of applying a protective organic coating to an optical glass fiber, said glass fiber is drawn from a preform and passed through a liquid which contains the material for forming said organic coating, once the amount of liquid coating... | 05/25/2004 |
| 6718801 | MCVD/PCVD method for making a preform with movement of a furnace The present invention relates to a method for producing a preform, which is substantially free of OH impurities, for an optical fiber, wherein one or more quartz layers, which may or may not be doped, are deposited on the internal surface of a quartz glass support t... | 04/13/2004 |
| 6701752 | Synthesized silica glass optical member and method for manufacturing the same A method for manufacturing a synthesized silica glass optical member, the method comprising: providing a porous silica glass body; heating the porous silica glass body in an atmosphere containing hydrogen or oxygen, and sintering the porous silica glass b... | 03/09/2004 |
| 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 |
| 6622527 | Adjusting the hydrogen content of a preform for an UV-optical fiber A core glass for making a preform for an optical fiber particularly useful for the transmission of ultraviolet radiation and methods for making the core glass are disclosed. The core glass is obtained by the flame hydrolysis of a silicon compound, deposit... | 09/23/2003 |
| 6601411 | Method for annealing an optical waveguide having a bragg grating to accelerate ageing The present invention provides a method for annealing an optical waveguide, including an optical fiber or large-diameter waveguide structure, having along some length an induced refractive index difference that decays over time and so causes drift in the ... | 08/05/2003 |
| 6588229 | Method for controlling heat treatment in process of fabricating high purity silica glass Disclosed is a method for controlling a heat treatment in the process of fabricating a high purity silica glass via a sol-gel process using a low temperature heater having an inhalation line and an exhaust line. Accordingly, the method includes the steps ... | 07/08/2003 |
| 6568220 | Method of fabricating optical fiber gratings maximizing residual mechanical stress in the optical fibers An optical fiber for maximizing residual mechanical stress and an optical fiber grating fabricating method using the optical fiber are provided. The optical fiber includes a core formed of silica, for propagating light, and a cladding formed of boron-dope... | 05/27/2003 |
| 6532767 | Methods for producing fused silica glass Methods for producing high purity fused silica (HPFS) glass having desired levels of dissolved hydrogen are provided. The methods involve measuring the level of hydrogen in the cavity of the furnace used to produce the glass and controlling the pressure w... | 03/18/2003 |
| 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 |
| 6449986 | Method of production of porous glass base material for optical fiber with cleaning of the burner with gas at 25 m/s or faster In a method of manufacturing a porous glass preform for an optical fiber which preform is formed as a deposit of fine glass particles by using a burner, a method to prevent the contamination of any glass particles having failed to be properly deposited so... | 09/17/2002 |
| 6336347 | Process for producing silica by decomposition of an organosilane A process for producing a high-purity optical silica preform, comprising (a) vaporization of an organosilicon compound; (b) thermal decomposition of the said organosilicon compound in the vapor state, to give amorphous fused silica particles; (c) depositi... | 01/08/2002 |
| 6266980 | Centerline protection using heavy inert gases Disclosed is a method of minimizing re-wetting of a preform upon removal of the preform from the consolidation furnace and producing core cane and/or optical fiber therefrom. During removal, the consolidated preform and, in particular, the centerline aper... | 07/31/2001 |
| 6220059 | Method of coating a UV-fiber with blocking layers and charging the fiber with hydrogen or deuterium A method of producing an optical component for the transmission of UV light is provided. An optical fiber is prepared from synthetic quartz glass or from doped synthetic quartz glass with a transmission region for the transmission of UV light, and the tra... | 04/24/2001 |
| 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 |
| 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 |
| 6115524 | Optical waveguide attenuating device and method for producing the same A method for making an optical attenuating device comprising an optical waveguide having a core doped with a transition metal and a cladding. The transition metal is deposited in the core during a core blankmaking process. The transition metal doped core ... | 09/05/2000 |
| 6094941 | Process for manufacturing optical member for excimer laser An excellent quartz glass optical member having stable laser beam resistance, can be obtained by preparing quartz glass in a process having: a first step of subjecting a starting material obtained from silicon halide, alkoxysilane, alkylalkoxysilane, etc. to a... | 08/01/2000 |
| 5983673 | Silica glass article and manufacturing process therefor A process of manufacturing a silica glass article comprising the steps of: (1) irradiating a silica glass article with electromagnetic waves to generate defects therein; and (2) immersing the thus irradiated silica glass article in an atmosphere comprisin... | 11/16/1999 |
| 5922098 | Cleaning a glass preform with a high temperature inert gas during the drawing of an optical fiber In a drawing method and drawing apparatus according to the present invention, a forward end portion of an optical fiber glass preform is heated and melted while the glass preform is fed into a drawing furnace 3 so that an optical fiber is drawn, and the o... | 07/13/1999 |
| 5917108 | Drawing a chalcogenide glass fiber in a sulfur atmosphere A method for manufacturing a glass fiber includes a process of drawing a starting glass material partially or entirely made of chalcogenide glass or oxychalcogenide glass, such as preform rod, rod-in-tube, or jacketing tube, into a glass fiber in an atmos... | 06/29/1999 |
