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| Number | Title | Issue Date |
| 7946137 | Long period fiber Bragg gratings written with alternate side IR laser illumination A method of optical fiber manufacture involves the writing of a grating on the fiber using a laser. A first laser beam is directed on a first locality of the fiber having a circumference. A second laser beam is then directed on a second locality circumferentially di... | 05/24/2011 |
| 7823418 | Method of making glass base material A glass base material manufacturing apparatus for manufacturing a glass base material comprising: a plurality burners, arranged in a row at a predetermined intervals along the longitudinal direction of a starting base material of the glass base material, for forming... | 11/02/2010 |
| 7326304 | Control of the pH in washwater recovery system for a glass forming line A neutralization system for controlling the pH of the washwater used to clean and maintain polyacrylic bound glass forming equipment is provided. The neutralization system introduces a base solution to a washwater solution when the pH of the washwater solution conta... | 02/05/2008 |
| 7290408 | Apparatus for supporting a preform having a supporting core The invention relates to apparatus for supporting a preform manufactured in an installation for manufacturing or building up preforms having supporting cores, said installation including at least rotation means having a horizontal axis of rotation and two mounting p... | 11/06/2007 |
| 7284397 | Method of controlling the polarization mode dispersion of an optical fiber during fiber drawing An optical fiber drawing installation is equipped with an oscillating pulley that applies torsion to the fiber alternately in one rotation direction and then in the opposite direction. To control the torsion applied to the fiber, images are formed of the fiber and t... | 10/23/2007 |
| 7251959 | Washwater neutralization system for glass forming line A neutralization system for controlling the pH of the washwater used to clean and maintain polyacrylic bound glass forming equipment. The neutralization system introduces a base solution to a washwater solution when the pH of the washwater solution contained in a cl... | 08/07/2007 |
| 7213416 | Glass base material producing device A glass base material manufacturing apparatus for manufacturing a glass base material comprising: a plurality burners, arranged in a row at a predetermined intervals along the longitudinal direction of a starting base material of the glass base material, for forming... | 05/08/2007 |
| 7185516 | Washwater neutralization system for glass forming line A neutralization system for controlling the pH of the washwater used to clean and maintain polyacrylic bound glass forming equipment. The neutralization system introduces a base solution to a washwater solution when the pH of the washwater solution contained in a cl... | 03/06/2007 |
| 7069748 | Optical fiber, optical fiber preform, and manufacturing method therefor An optical fiber and an optical fiber preform having optical characteristics, such as the wavelength dispersion, close to design values by controlling the amount of change in the refractive index in the core, thereby realizing high-quality and high-speed transmissio... | 07/04/2006 |
| 7045737 | Glass-processing method and glass-processing apparatus for the method A glass-processing method adjusts the range of the heating region according to the work piece and processing condition, and a glass-processing apparatus implements the method. The method incorporates the heating of a glass body with a thermal plasma torch comprising... | 05/16/2006 |
| 7021084 | Insulation shielding for glass fiber making equipment An energy-efficient inductive heater operable to heat a rotary glass fiber discharging spinner. The heater includes shielding disposed between the induction coil and the metal guard plates of the heater. The shielding may comprise any electrically insulative or diel... | 04/04/2006 |
| 6988382 | Method for manufacturing glass-base-material by measuring the weight of the material An apparatus for manufacturing a glass-base-material, which is a base material of an optical fiber, includes a driving unit that drives a glass rod around an axis of the glass rod; a burner for accumulating glass soot around outside surface of the glass rod, which i... | 01/24/2006 |
| 6941772 | Apparatus and method for manufacturing glass-base-material An apparatus for manufacturing a glass-base-material, which is a base material of an optical fiber, includes a driving unit that drives a glass rod around an axis of the glass rod; a burner for accumulating glass soot around outside surface of the glass rod, which i... | 09/13/2005 |
| 6923579 | Fiber optic component marking with fiber optic indicia This invention provides a method of marking a fiber optic indicia on the surface of a fiber optic component and the fiber optic component produced thereby. The fiber optic indicia is represented as a predetermined pattern marked on the fiber optic component and is a... | 08/02/2005 |
| 6923023 | Methods and apparatuses for controlling optical fiber primary coating diameter Methods and apparatuses estimate and control optical fiber primary coating diameter for wet-on-wet optical fiber manufacturing. The primary coating diameter for a particular length of optical fiber is calculated based upon a measurement of the weight of primary and/... | 08/02/2005 |
| 6923025 | Device for sintering a shaped body The invention concerns a device (1) for sintering of a porous mold body (2) in a gas-tight chamber (3), with the mold body (2) hanging loose from a link chain (7) so that it can be fed continuously to a heating zone (5). In ... | 08/02/2005 |
| 6748766 | Porous preform vitrification apparatus A porous preform vitrification apparatus of the present invention, provided with a means for forcibly feeding nitrogen etc. from a furnace core tube to a discharge gas pipe so as to balance a pressure between a furnace core tube accommodating a porous preform and a ... | 06/15/2004 |
| 6735983 | Optical fiber drawing method and drawing furnace A fiber drawing method according to the present invention is a drawing method of optical fiber for drawing an optical fiber 14 from one end of a fiber preform 13 by softening with heat, wherein the fiber preform 13 is set in a semi-closed space ... | 05/18/2004 |
| 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 |
| 6701753 | Method and apparatus for making improved optical fiber preforms and optical fiber therefrom Embodiments of the invention include a method and apparatus for making optical fiber preforms and optical fiber. The method includes the steps of positioning an overclad tube around a preform core rod, heating the overclad tube along the length thereof in... | 03/09/2004 |
| 6672112 | OVD apparatus including air-regulating structure An apparatus for manufacturing a glass base material, which is a base material of an optical fiber, comprising: a base rod, around and along which said glass base material is formed; a burner that hydrolyzes and accumulates a gas material, which is a base... | 01/06/2004 |
| 6643440 | Temperature range adjusted coated optical fibers A coated optical fiber adjusted to operate at a predetermined temperature range. The coated fiber includes an optical fiber, a first polymer coating generally concentrically surrounding the optical fiber and a second polymer coating generally concentrical... | 11/04/2003 |
| 6547920 | Chemical stripping apparatus and method An apparatus for forming a loop in a filament comprising a first wall having a first guide slot formed therein and a second wall having a second guide slot formed therein coplanar and parallel to the first guide slot. The first wall is opposite the second... | 04/15/2003 |
| 6526782 | Multi heating zone apparatus and process for making core/clad glass fibers This invention pertains to apparatus and process for making core/clad glass fibers. The apparatus includes a central tube or receptacle connected at the top to a pressure controller and terminating in a reduced section; a side tube or receptacle positione... | 03/04/2003 |
| 6499319 | Temperature control by means of a CCD-camera in welding fiber ribbon cables In welding optical fiber ribbons by means of an electric arc formed between electrodes the region heated by the electric arc is mapped on CCD-elements in a camera. In the obtained picture the light intensity of those portions of the picture is determined ... | 12/31/2002 |
| 6487880 | Optical fiber preform manufacturing apparatus Disclosed are an optical fiber preform manufacturing apparatus and method in which processes for shrinking and closing a deposited tube are conducted using a device suitable for those processes, which device is other than the device used in a deposition p... | 12/03/2002 |
| 6460379 | MCVD apparatus having two opposing motors to eliminate backlash in burner motion In accordance with the invention, a preform from which fiber optics are drawn is fabricated by supplying reactants and gas vapors to the preform and by using two opposing forces to control the movement of a heat source supplying heat to the preform. The t... | 10/08/2002 |
| 6442978 | Apparatus for sintering a porous glass base material and a method therefor Apparatus (700) for sintering a glass base material (2) which is a base material for an optical fiber. The sintering apparatus (700) includes: a control unit which varies a condition for sintering the glass base material; and a furnace (12) which sinters ... | 09/03/2002 |
| 6428204 | Method of making a coated optical fiber comprising measuring the delamination resistance of the coating at two different temperatures Making a polymer-clad optical fiber comprising a step of determining at a plurality of temperatures the delamination resistance of the polymer coating from fiber. The delamination resistance at ambient temperature can be compared with a predetermined targ... | 08/06/2002 |
| 6359400 | Direct drive spindle for use in chemical vapor deposition A direct drive system for use in, for example, the MCVD process, includes a motor housing affixed to a lathe headstock which contains electrical motor windings, and forms the stator of the motor. A hollow rotatable spindle is contained within the headstoc... | 03/19/2002 |
| 6354113 | Fiber optic draw furnace featuring a fiber optic preform heating and fiber drawing programmable logic controller The present invention provides a fiber optic draw furnace having a fiber optic heating and draw control system that controls the heating of a fiber optic preform which is partially melted by a furnace and the drawing of an optical fiber from the fiber opt... | 03/12/2002 |
| 6237370 | Apparatus for automated production, and/or packaging and/or testing of fiber optic devices including optical fiber system components and optical fibers A system for automated production of a fiber optic device includes a chamber regulating an environment and/or atmosphere within for the automated production of the fiber optic device. The system also includes a sealable input port, communicating with the ... | 05/29/2001 |
| 6202448 | Making mineral fibers including adjustment of the position of a stream of glass and a rotor The production of mineral fibers by centrifuging on rollers (3, 4, 5, 6) with horizontal axes from a stream (1) of molten material includes determining the relative position of the stream (1) of molten material in relation to the first roller (3), and con... | 03/20/2001 |
| 6196028 | Apparatus for controlling the sag of a preform in an installation The invention relates to apparatus for supporting a preform manufactured in an installation for manufacturing or building up preforms having supporting cores, said installation including at least rotation means having a horizontal axis of rotation and two... | 03/06/2001 |
| 6138480 | Apparatus for controlling optical fiber diameter based on initial gob movement Disclosed is a method of controlling the diameter of a glass rod drawn from a glass preform. The diameter control begins as soon as a glass gob begins to move away from a heated portion of the preform. The velocity of the gob is measured and furnace tempe... | 10/31/2000 |
| 6003341 | Device for making fiber couplers automatically A system for automated production of a fiber optic device includes a chamber regulating an environment and/or atmosphere within for the automated production of the fiber optic device. The system also includes a sealable input port, communicating with the ... | 12/21/1999 |
| 6003342 | Apparatus for production of optical fiber preform Disclosed is a process of producing an optical fiber preform having a step of charging a feedstock gas in an oxygen-hydrogen burner via an electrode and hydrolyzing the same in an oxygen-hydrogen flame to produce particulates containing charged glass part... | 12/21/1999 |
| 5987927 | Method of making fibers with deducing the position of the point of impact of a stream of molten material The production of mineral fibers by centrifuging on rollers (3, 4, 5, 6) with horizontal axes from a stream (1) of molten material includes determining the relative position of the stream (1) of molten material in relation to the first roller (3), and con... | 11/23/1999 |
| 5944865 | Apparatus for fabricating an optical fiber coated with metal and method therefor An apparatus for fabricating an optical fiber coated with metal, constructed with a crucible for melting the optical fiber preform to draw an uncoated optical fiber, a diameter measuring device for measuring the diameter of the uncoated optical fiber to r... | 08/31/1999 |
| 5908484 | Method of making a coated optical fiber comprising measuring the delamination resistance of the coating Measurement of the delamination resistance of polymer coated optical fiber can provide valuable information for quality control and/or coating development, and a method of making polymer coated optical fiber that includes determination of the delamination... | 06/01/1999 |
