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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7886561 | Method for drawing glass parent material and drawing machine for use therein To provide a elongating method for elongating an optical fiber parent material with high reliability by implementing a high precision control for the outer diameter in short time. This elongating method includes a process for switching a control method for at least ... | 02/15/2011 |
| 7600399 | Method and device for producing a cylindrical glass body In a known method for producing a cylindrical glass body in a vertical drawing process, a glass blank is softened in a heating zone and drawn off as a glass strand by means of a draw-off device at a controlled drawing speed, the draw-off device comprising a first dr... | 10/13/2009 |
| 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 |
| 7215857 | Process and apparatus for elongating of an optical fibre preform A process and apparatus for elongating an optical fibre preform includes heating the preform so as to soften one region thereof; elongating the preform by submitting the preform to a traction; determining, during the step of elongating, the preform diameter in at le... | 05/08/2007 |
| 7197898 | Robust diameter-controlled optical fiber during optical fiber drawing process There is provided robust diameter-controlled optical fiber during optical fiber drawing process and an optical fiber drawing process which comprises drawing the optical fiber from a perform therefor under tension to form the optical fiber while heating and melting t... | 04/03/2007 |
| 7195194 | Process for automatic removal of packages A process for automatically removing packages in a winding station of a yarn winding machine, having elements (1) for holding and disengaging a full package (2), a winding guide (3) guiding the yarn to be wound during winding, a bar (7) f... | 03/27/2007 |
| 7129446 | Reflow device A device is provided to heat the whole heated surface of a carried member carried intermittently with a temperature change over time maintained constant. The device controls the driving of a belt-conveyer so that a heater moves in a carrying direction at a carry tim... | 10/31/2006 |
| 7068943 | Devices and methods for dynamic dispersion compensation The present invention provides devices and methods for dynamic dispersion compensation. According to one embodiment of the invention, a dispersion compensating device includes a negative dispersion fiber having an input configured to receive the optical signal, the ... | 06/27/2006 |
| 6959131 | Achromatic fiber-optic power splitter and related methods An achromatic power splitter is formed from multiple optical fibers. The achromatic power splitter operates single mode, which permits the power splitter to operate substantially insensitive to changes in wavelength of the input light, to changes in the polarization... | 10/25/2005 |
| 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 |
| 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 |
| 6931188 | Side-hole cane waveguide sensor A side-hole optical cane for measuring pressure and/or temperature is disclosed. The side-hole cane has a light guiding core containing a sensor and a cladding containing symmetrical side-holes extending substantially parallel to the core. The side-holes cause an as... | 08/16/2005 |
| 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 |
| 6910351 | Method of fabricating an optical fiber with controlled transmission characteristics The invention relates to a method of fabricating an optical fiber with improved control of transmission characteristics. It proposes determining variations in the characteristics of the preform departing from the design characteristics and modifying the diameter of ... | 06/28/2005 |
| 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 |
| 6876804 | Method of making a spun optical fiber with low polarization mode dispersion An optical fiber, and a method of making such optical fiber, wherein the optical fiber exhibits a beatlength greater than about 5 meters, and the fiber is spun to provide a polarization mode dispersion in the spun state of said fiber which is less than 0.05 ps/km | 04/05/2005 |
| 6848276 | Optical fiber manufacture method, preform manufacture method, and preform manufacture apparatus 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 progress o... | 02/01/2005 |
| 6792186 | Light fibers and methods for producing the same A light fiber comprising (a) a tubular clad having a predetermined length and (b) a solid core formed by reacting a filler material with which the clad is filled, the clad and the core being closely contacted with each other by shrinkage of the clad, characterized i... | 09/14/2004 |
| 6779362 | Method of making an optical fiber preform where a second elongation is based on a mark on a glass rod 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 progress o... | 08/24/2004 |
| 6763685 | Fabrication of multiplexing and demultiplexing single-mode fiber optic couplers Multiplexing and demultiplexing single-mode fiber optic couplers are fabricated by aligning two single-mode fibers which have been stripped of their protective plastic jackets and cleaned so that they are held in parallel contact with each other, and then fusing the... | 07/20/2004 |
| 6554938 | Over-coated optical fiber and manufacturing method thereof One or more optical fiber elements each constituted by a coated glass fiber are fed to an over-coating device and an over-coating is applied to the optical fiber elements in a lump, the feeding speed of the optical fiber elements to the over-coating devic... | 04/29/2003 |
| 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 |
| 6514612 | Glass fibre coating composition, method using said composition and resulting product The present invention relates to a sizing composition for a glass yarn, consisting of a solution whose solvent content is less than 5% by weight, this solution comprising at least 60% by weight of polymerizable components, at least 60% by weight of these ... | 02/04/2003 |
| 6502428 | Manufacturing method of an optical fiber A manufacturing method of an optical fiber, which enables to precisely manufacture the optical fiber having a desired chromatic dispersion, comprising: (1) preparing an optical fiber preform having a longitudinally uniform refractive index, (2) measuring ... | 01/07/2003 |
| 6438997 | Method of elongating glass preform In a method of elongating a glass preform comprising the steps of holding both ends of the glass preform 1a with a first holding section 2 and a second holding section 3, respectively; moving the first holding section 2 and the second holding section 3 in... | 08/27/2002 |
| 6425270 | Rod in tube method of forming a fiber preform, with maintaining a gas supply until after an end is stretched A method for producing an optical fiber preform comprising inserting a core glass rod for use in the optical fiber preform into the quartz glass tube for the optical fiber preform and then welding them in a heating furnace to melt weld them together into ... | 07/30/2002 |
| 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 |
| 6371394 | Method for winding a fibre element having different longitudinal portions Method for winding a fiber element onto a support. The fiber element having at least two longitudinal portions (Pi) with different characteristics. The method including the steps of supplying the fiber element to the support and associating wit... | 04/16/2002 |
| 6370919 | Method of setting parameters for welding optical waveguides by determining the reduction of a construction diameter A test optical fiber section (F) that resides under tensile stress (F) is heated in at least one longitudinal location so that a constriction (Ɗd) of its outside circumference forms thereat. This constriction (Ɗd) is acquired and utilized for setting we... | 04/16/2002 |
| 6301934 | Method of making a dispersion-managed optical fiber with varying the feed rates of an RIT process The invention is a method of making an optical fiber or cane (600) that has optical properties that vary axially. Core glass (100) and clad glass (200) are fed into a furnace to form the cane or fiber. The velocities of the feeding of the clad and core ar... | 10/16/2001 |
| 6279354 | Cooler of optical fiber draw tower A cooler of an optical fiber draw tower, situated below a melting furnace for melting a preform for an optical fiber, for cooling the optical fiber drawn from the preform melted in the melting furnace, includes at least one heat exchanger installed with a... | 08/28/2001 |
| 6250112 | Method of controlling an extrusion of glass to make an optical fiber A double crucible fiber fabrication system employing a rod to control flow of the core material to produce a core of desired diameter. The rod fits closely within the inner crucible and moves at a speed necessary to produce a core material flow rate which... | 06/26/2001 |
| 6178778 | Method of stretching an optical fiber preform with monitoring the diameter at two locations In the manufacturing of optical fiber preform with excellent accuracy of outer diameter made of the rod as drawn from synthetic quartz ingot, the outer diameter measuring devices 67 and 68 measure the outer diameters of the cone 2 and rod 3 drawn from the... | 01/30/2001 |
| 6167728 | Method and apparatus for controlling heating and cooling in segments of a fiber glass bushing A supplemental controller for a fiber glass bushing actively performs heating and cooling of a connected segment of the bushing which is otherwise controlled by a primary controller. In one embodiment, the supplemental controller performs heating by means... | 01/02/2001 |
| 6134922 | Method for drawing a glass ingot A method for drawing a glass ingot into a rod having a given outer diameter is described. The method is characterized in that when the glass ingot is fed into a heating zone at a final tapered portion thereof, a temperature in the heating zone is decrease... | 10/24/2000 |
| 6112555 | Method for changing incident heat and pulling of an optic fiber via monitoring of rate of change of coupling ratio Fused biconical tapered couplers formed from the pulling of heated optical fibers have controllable coupling ratios by dynamically adjusting the heat intensity and pull speed during fabrication. Fiber coupler fabrication begins by arranging two optical fi... | 09/05/2000 |
| 6098428 | Process for drawing glass fiber using prediction of future geometric parameter of the fiber A glass blank is sent to a heating zone where it is softened region by region and drawn continuously in a controlled manner as a drawing bulb is formed. Estimates of at least one controlled variable are predicted free of dead time; in addition, at least o... | 08/08/2000 |
| 6035667 | Method of making glass yarn with controlled tension When one strand, which is formed by gathering a multiplicity of glass filaments having a diameter of 9μ or less and formed by drawing molten glass flowed out through a multiplicity of orifices formed in the bottom portion of a bushing, is wound around a ... | 03/14/2000 |
| 6018965 | Method of forming a fiber optic coupler by dynamically adjusting pulling speed and heat intensity based on a monitored rate of change in the coupling ratio Fused biconical tapered couplers formed from the pulling of heated optical fibers have controllable coupling ratios by dynamically adjusting the heat intensity and pull speed during fabrication. Fiber coupler fabrication begins by arranging two optical fi... | 02/01/2000 |
| 6002472 | Method of measuring optical fiber drawing tension A method of measuring the tension of drawing an optical fiber by means of the oscillation waveform of the optical fiber being drawn according to the invention can accurately, reliably and easily detect a peak frequency in the frequency spectrum of an osci... | 12/14/1999 |
