| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Method and apparatus for impulsively spinning optical fiber | US10397490 | 2003-03-26 | US07861556B2 | 2011-01-04 | Xin Chen; Patrick J. Cimo; Daniel W. Hawtof; Ming-Jun Li; Daniel A. Nolan |
| A method and apparatus for impulsively spinning optical fiber while the optical fiber is being drawn is disclosed herein. | ||||||
| 162 | Optical fiber twisting apparatus with a roller having an accuracy of 15 microns or less | US11471662 | 2006-06-21 | US07845195B2 | 2010-12-07 | Kenji Okada; Koichi Harada |
| An optical fiber twisting apparatus that prevents line distortion in an optical fiber undergoing a drawing process and provides a consistent coating on a bare optical fiber. This optical fiber twisting apparatus includes a twist roller apparatus that having a twist roller that, by imparting a twist to an optical fiber, imparts a twist to a molten portion of an optical fiber preform positioned on an upstream side of the optical fiber, and a support portion that supports the twist roller. The accuracy of the outer circumference of the twist roller when the twist roller is forming a part of the twist roller apparatus is 15 μm or less. | ||||||
| 163 | Method of making a low PMD optical fiber | US12308269 | 2006-06-22 | US20100232754A1 | 2010-09-16 | Davide Sarchi; Maddalena Ferrario |
| A method of making an optical fiber includes the steps of: providing an optical fiber preform; heating an end portion of the optical fiber preform so as to obtain a softened preform end portion; drawing the softened preform end portion to form the optical fiber; applying to the optical fiber a substantially sinusoidal spin having a spin amplitude and a spin period, the substantially sinusoidal spin being transmitted to the softened preform end portion, and determining an actual spin amplitude applied to the fiber, wherein the actual spin amplitude is the spin amplitude applied in correspondence to the softened preform end portion. The spin amplitude and spin period of the substantially sinusoidal spin are selected in such a way that a ratio of the actual spin amplitude to the spin period is in the range of approximately 0.8 to approximately 1.4 turns/m2. | ||||||
| 164 | OPTICAL FIBER TWISTING APPARATUS, METHOD OF MANUFACTURING OPTICAL FIBER, AND OPTICAL FIBER | US12540831 | 2009-08-13 | US20090303464A1 | 2009-12-10 | Kenji OKADA; Koichi Harada |
| An optical fiber twisting apparatus that prevents line distortion in an optical fiber undergoing a drawing process and provides a consistent coating on a bare optical fiber. This optical fiber twisting apparatus includes a twist roller apparatus that having a twist roller that, by imparting a twist to an optical fiber, imparts a twist to a molten portion of an optical fiber preform positioned on an upstream side of the optical fiber, and a support portion that supports the twist roller. The accuracy of the outer circumference of the twist roller when the twist roller is forming a part of the twist roller apparatus is 15 μm or less. | ||||||
| 165 | Relational database management system having integrated non-relational multi-dimensional data store of aggregated data elements | US12384093 | 2009-03-31 | US20090271384A1 | 2009-10-29 | Reuven Bakalash; Guy Shaked; Joseph Caspi |
| Improved method of and apparatus for joining and aggregating data elements integrated within a relational database management system (RDBMS) using a non-relational multi-dimensional data structure (MDD). The improved RDBMS system of the present invention can be used to realize achieving a significant increase in system performance (e.g. deceased access/search time), user flexibility and ease of use. The improved RDBMS system of the present invention can be used to realize an improved Data Warehouse for supporting on-line analytical processing (OLAP) operations or to realize an improved informational database system or the like. | ||||||
| 166 | Method and Apparatus for the Production of Optical Fibers With Reduced Polarization Mode Dispersion | US12086689 | 2005-12-23 | US20090205374A1 | 2009-08-20 | Roberto Pata; Giacomo Stefano Roba; Davide Sarchi; Marco Tedeschi |
| A method and apparatus for manufacturing an optical fiber includes the steps and/or means of: drawing a fiber from a heated preform by applying a pulling force to the fiber; spinning the fiber while it is drawn, wherein the step of spinning the fiber includes the sub-steps of winding the fiber on a spin roller by a winding arc, such that a friction force is generated between the fiber and the spin roller resulting from the winding arc and from the pulling force; axially displacing the spin roller such that the fiber is caused to roll over the spin roller surface by the friction force. | ||||||
| 167 | Methods and apparatus for forming heat treated optical fiber | US10424452 | 2003-04-28 | US07565820B2 | 2009-07-28 | John D. Foster; Hazel B. Matthews, III |
| A method for forming an optical fiber includes drawing the optical fiber from a glass supply and treating the fiber by maintaining the optical fiber within a treatment temperature range for a treatment time. Preferably also, the fiber is cooled at a specified cooling rate. The optical fiber treatment reduces the tendency of the optical fiber to increase in attenuation due to Rayleigh scattering, and/or over time following formation of the optical fiber due to heat aging. Apparatus are also provided. | ||||||
| 168 | Furnace for Drawing Optical Fiber Preform to Make Optical Fiber and Method for Drawing Optical Fiber Using the Same | US12365057 | 2009-02-03 | US20090145169A1 | 2009-06-11 | Sang-Joon Bae; Young-II Kwon; Joon-Keun Lee; Chul-Min Kim; Myung-Ho Jang |
| A furnace for drawing an optical fiber includes a body having an upper and lower openings for supplying a preform and discharging a drawn optical fiber, a heating unit installed in the body for receiving and melting the preform, an atmosphere blocking tube installed to the lower opening for discharging the drawn optical fiber and blocking the optical fiber from the atmosphere, an upper introduction port formed at an upper portion of the body for introducing an inert gas toward the preform and partially discharged outside through a gap between the preform and the upper opening, a central and lower introduction ports formed at central and lower portions for introducing an inert gas into the body, a first flow guiding means for guiding the inert gas introduced through the central introduction port upward and then flowed down along a surface of the preform, and a second flow guiding means for guiding the inert gas introduced through the lower introduction port upward and then discharged outside through the atmosphere blocking tube along a surface of the drawn optical fiber. | ||||||
| 169 | Low polarisation mode dispersion (PMD) optical fiber link, and method of making the same | US10584988 | 2004-12-16 | US07534055B2 | 2009-05-19 | Alexis Debut; Francesco Sartori; Martino Travagnin |
| An optical fiber link has a plurality of optical fiber spans joined one to the other, the plurality of optical fiber spans including at least one first unidirectionally-spun optical fiber span and at least one second unidirectionally-spun optical fiber span having mutually opposite spinning directions. | ||||||
| 170 | Method, System and Device for Imparting a Predetermined Rotation to an Optical Fibre | US11792083 | 2004-12-02 | US20080141723A1 | 2008-06-19 | Franco Cocchini; Giuseppe Malafronte; Andrea Mazzotti; Gerardo Testa |
| A method and a system based on the method imparts to an optical fiber a predetermined rotation about its axis, wherein the fiber is rotated by way of a frictional force acting on the fiber while it is advanced in a predetermined direction. The rotation actually imparted to the optical fiber is measured on-line while the fiber is advancing in the direction and the frictional force is controlled responsively to the measured rotation so as to obtain the predetermined rotation. Spinning devices acting on the optical fiber by way of an externally controllable frictional force and particularly suitable to be used with the method are disclosed. | ||||||
| 171 | Anti-PMD system for optical fibers | US10649720 | 2003-08-28 | US07383703B2 | 2008-06-10 | Eric Lainet; Kamel Dougdag; Jean-François Bourhis |
| An anti-PMD system comprises a pulley which oscillates in rotation and applies a torsion torque alternately in the clockwise direction and in the counterclockwise direction to an optical fiber during drawing of the optical fiber to reduce its PMD. A portion of a peripheral external surface of the pulley intended to be in contact with the optical fiber during drawing is convex. | ||||||
| 172 | Optical fibre having low splice loss and method for making it | US10538899 | 2002-12-24 | US20070003200A1 | 2007-01-04 | Antonio Collaro; Giuseppe Ferri |
| A process for making a non-zero dispersion shifted optical fibre having low splice loss and low attenuation and to an optical fibre produced by this process. A reduction of the splice loss is observed with decreasing drawing tension. The optical fibre has a core region that includes three segments and an inner cladding segment, each having a maximum refractive index percent difference, Δdeltai %, i=0-3, the subscript i referring to a particular refractive index, the core segments being selected such that Δdelta0%>Δdelta2%>Δdelta1%≧0 and Δdelta2%>Δdelta3%≧0. Optical fibres exhibiting low splice loss were drawn at tensions not larger than 150 g, preferably not larger than 100 g. | ||||||
| 173 | Optical fiber, method for manufacturing same and optical transmission channel | US11335467 | 2006-01-20 | US20060198591A1 | 2006-09-07 | Shuhei Hayami; Mitsuhiro Kawasaki; Yohei Uchida |
| The present invention provides an optical fiber of which a zero dispersion wavelength falls within a range of between 1,250 nm and 1,350 nm inclusive, transmission loss at 1,550 nm is equal to or less than 0.185 dB/km, chromatic dispersion at 1,550 nm is within the range of 19±1 ps/nm·km, a dispersion slope at 1,550 nm is equal to or less than 0.06 ps/nm2·km, an effective area Aeff is equal to or more than 105 μm2, a cable cutoff wavelength λcc is equal to or less than 1,530 nm, polarization mode dispersion is equal to or less than 0.1 ps/km1/2, and a loss when the optical fiber is wound on a mandrel having an outer diameter of 20 mm is equal to or less than 10 dB/m. | ||||||
| 174 | Method of making a jacketed preform for optical fibers using OVD | US10151846 | 2002-05-20 | US07089765B2 | 2006-08-15 | Hartwig Schaper; Norbert Treber; Oliver Humbach; Uwe Haken; Donald Paul Jablonowski |
| On the basis of a known process for the production of a preform for an optical fiber for optical data transmission technology, the productivity of the process for the production of complex refractive index profiles is to be improved by providing a quartz glass substrate tube which exhibits different doping in radial direction, introducing a core glass made of synthetic quartz glass into the substrate tube and covering the substrate tube with a jacket tube. A substrate tube suitable therefor is also being provided which tube requires less core glass material for the production of the preform, whether during the internal deposition or for the core glass rod in the rod-in-tube technique. Regarding the process it is proposed according to the invention that a substrate tube be used which was obtained by vitrification of a porous tube-shaped SiO2 blank, the substrate tube being provided with a core glass layer which is produced in that to the first radial portion of the SiO2 blank there is added before the vitrification a first dopant which increases the refractive index of quartz glass. The substrate tube according to the invention has in the radial direction regions of different doping whereby it incorporates a core glass layer which has a refractive index of at least 1.459. | ||||||
| 175 | Method of imparting twist to optical fiber | US11015509 | 2004-12-16 | US20060133751A1 | 2006-06-22 | Xin Chen; Ming-Jun Li; Nicol Heron; Jeanne Swecker; Naiyue Zhou |
| A method for producing low-PMD fiber, in which a glass fiber is drawn from an optical fiber perform by a tractor which pulls such optical fiber from said perform; subsequent to said tractor pulling the fiber is twisted about its axis to increase the magnitude of twist which is imparted to said fiber. The fiber is then wound onto a fiber storage spool such that at least a portion of the twist imparted to said optical fiber is retained while said fiber is wound on said spool. | ||||||
| 176 | Multimode optical fibers with increased bandwidth | US10786738 | 2004-02-25 | US07043128B2 | 2006-05-09 | David John DiGiovanni; Frank Vincent DiMarcello; XinLi Jiang; George E. Oulundsen; Sandeep Prabhakar Pandit |
| The specification describes a technique for drawing circular core multimode optical fiber using twist during draw to increase fiber bandwidth. | ||||||
| 177 | Method of fabricating a cylindrical optical fiber containing a light interactive film | US11034156 | 2005-01-12 | US20060042323A1 | 2006-03-02 | Philipp Kornreich; Douglas Keller; James Flattery |
| A method of forming a preform which has a glass core surrounded by an outer glass cladding with a coating of a light interactive material disposed between the core and cladding. The method includes providing a glass core having a viscosity which lies within a given preselected temperature range, followed by forming a substantially homogeneous coating of a light interactive material over the surface of the core, with the coating material having a viscosity which is equal to or less than the viscosity of the glass core. A glass cladding is formed over the coated layer, with the cladding glass having a viscosity which overlaps the viscosity of the core glass and a thermal coefficient of expansion compatible with that of the core. The light interactive material is an inorganic material which includes a metal, metal alloy, ferrite, magnetic material and a semiconductor. | ||||||
| 178 | Optical fiber preform producing method, optical fiber preform, and optical fiber | US10312911 | 2001-12-07 | US06987917B2 | 2006-01-17 | Masaaki Hirano; Masashi Onishi; Hideyuki Ijiri |
| An object of the present invention is to provide a method for manufacturing an optical fiber preform having a great diameter by reducing an eccentricity or a non-circularity of a core, an optical fiber preform having an small non-circularity and a complex refractive index profile, even with a great diameter, and an optical fiber that is applicable as a dispersion compensating fiber. The present invention involves a rod-in collapse process in which a glass rod is fixed within a glass pipe (or a dummy pipe attached to an end portion) via an aligning jig. The fixation via the aligning jig is made at one end or both ends, the aligning jig has a cylindrical shape with or without one or more reduced diameter portions. When fixed at one end, a heating and integrating process is preferably made from an opposite end. Employing the glass rod and the glass pipe having a refractive index distribution, a complex profile can be realized. | ||||||
| 179 | Optical fiber and a method for manufacturing same | US10520619 | 2003-07-10 | US20050259932A1 | 2005-11-24 | Katsuya Nagayama; Keisei Morita |
| There is prepared an optical fiber preform 2 whose core region is doped with Ge in such a quantity of dopant that the relative refractive-index difference [Ge] expressed in % with respect to pure SiO2 satisfies the condition [Ge]≧0.3%, where upon after being heat drawn with a drawing furnace 11 into an optical fiber 3, the optical fiber 3 is annealed in a heating furnace 21 downstream of the drawing furnace 11 under a condition that the cooling speed is 2000° C./second or less, and the period of annealing time is equal to or longer than the relaxation time. Further, the annealed optical fiber 3 is introduced into a cooling means 31 at an entry temperature of 700° C. or more, and the optical fiber 3 is forcibly cooled by the cooling means 31. As a consequence, there are achieved an optical fiber and a method of fabricating the same capable of fabricating the optical fiber having a reduced Rayleigh scattering loss as well as excellent hydrogen-resisting property with favorably high productivity. | ||||||
| 180 | Method for the manufacture of optical fibers, improved optical fibers, and improved raman fiber amplifier communication systems | US10353762 | 2003-01-29 | US06952517B2 | 2005-10-04 | David Kalish; Jinkee Kim; Robert Lingle, Jr.; Yifei Qian |
| The specification describes an improved optical fiber design in which the criteria for high performance in a Raman amplified optical system, such as moderate effective area, moderate dispersion, low dispersion slope, and selected zero dispersion wavelength, are simultaneously optimized. In preferred embodiments of the invention, the dispersion characteristics are deliberately made selectively dependent on the core radius. This allows manufacturing variability in the dispersion properties, introduced in the core-making process, to be mitigated during subsequent processing steps. | ||||||
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