| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | 正弦光纤扭转装置 | CN200820034001.8 | 2008-04-10 | CN201228253Y | 2009-04-29 | 薛济萍; 沈一春; 薛群山; 庄卫星; 曹珊珊; 钱宜刚; 许春华 |
| 本实用新型正弦光纤扭转装置涉及的是一种对涂覆后的光纤进行搓动，以此来逐渐抵消两个偏振模在光纤中传输时的相对相位时延，从而极大程度的降低光纤偏振模色散PMD值，并使其控制在一个较为稳定的状态的光纤扭转装置。其结构包括正弦扭转搓动轮、过渡轮、工作面板、支架、电气控制台，工作面板装在支架上，工作面板下部设置有两台步进电机，正弦扭转搓动轮设置有两个，正弦扭转搓动轮分别装在步进电机轴上，支架上设置有过渡轮，电气控制台装在支架一侧。电气控制台上设置有PLC可编程控制器、控制开关。 | ||||||
| 142 | 光纤、光纤预制棒 | CN02284626.3 | 2002-11-06 | CN2603406Y | 2004-02-11 | 内山圭祐; 堀越雅博; 原田光一 |
| 一种光纤和光纤预制棒，通过控制其芯体中的折射率的变化值，使其光学特性，诸如波长色散，接近于设计值，由此实现高质量和高速度的传输，以及相应的制造方法。光纤或光纤预制棒是以这样一种方式制造的，使得在芯体的相对于包层的相对折射率为其最大值的80％或更高的区域中的每个位置上，相对折射率沿包层的直径的变化率绝对值为0.5或更小，其中沿包层直径的位置是由相对于包层直径的百分数来定义的。 | ||||||
| 143 | OPTICAL FIBER WITH LOW PMD AND METHOD OF MAKING IT BY SPINNING | PCT/US2004031023 | 2004-09-21 | WO2005042422A3 | 2005-06-23 | CHEN XIN; LI MING-JUN; MEYER JESSE C; PALMER OSCAR |
| An optical fiber, and a method of making such optical fiber, wherein the optical fiber exhibits a beatlength greater than about 0.5 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/km1/2. The fiber is spun by employing a spin having a spin repeat distance of at least 1 meter and a plurality of varying spin reversal distances occurring within the spin repeat distance. The spin alternates between clockwise and counterclockwise directions. | ||||||
| 144 | LARGE EFFECTIVE AREA OPTICAL FIBER | PCT/US0145235 | 2001-11-29 | WO0248767A9 | 2003-02-13 | BERKEY GEORGE E; FREITAG KARL P; MA DAIPING; MISHRA SNIGDARAJ K |
| An optical waveguide fiber having a relatively large effective area which exhibits low attenuation, low PMD and low microbending sensitivity. A step-index refractive index profile is advantageously used. | ||||||
| 145 | OPTICAL FIBER HAVING LOW POLARIZATION-MODE DISPERSION AND LOW ATTENUATION AND METHOD OF ITS MANUFACTURE | PCT/US0010303 | 2000-04-17 | WO0064824A3 | 2001-05-03 | ALLEN MARTIN W; BOOKBINDER DANA C; CHOWDHURY DIPAKBIN Q; HAWTOF DANIEL W; POWERS DALE R |
| A method of fabricating an optical waveguide fiber that includes the steps of providing a cylindrical glass optical fiber preform having a longitudinally extending centerline hole, and closing the hole under conditions suitable to result in uniform and symmetric hole closure. The method may include first plugging a first end and a second end of the centerline hole to prevent gas flow therethrough. The method preferably involves closing the centerline hole of the preform by drawing the preform down into an optical waveguide fiber. An optical fiber produced by the method has a polarization mode dispersion (PMD) of <0.2 ps km-2. | ||||||
| 146 | ELLIPTICAL CORE FIBER WITH AXIALLY DECREASING ASPECT RATIO AND METHOD | PCT/US9706001 | 1997-04-11 | WO9740408A3 | 1997-12-04 | HAWK ROBERT M |
| A single-mode elliptical core optical fiber (15) suitable for the transmission of solitons has a core aspect ratio that changes along the length of the fiber to provide a fiber dispersion that monotonically decreases along the fiber from one end thereof to the other. The fiber preform (30) is drawn from a draw blank (10) having a glass core (11) surrounded by cladding glass (12) and having apertures (13) that are diametrically opposed with respect to the core (11). The cross-sectional area of the void space within the apertures (13) varies with respect to the longitudinal distance along the apertures. | ||||||
| 147 | ULTRA LOW PMD FIBERS AND METHOD OF MAKING | PCT/US2009059365 | 2009-10-02 | WO2010042403A2 | 2010-04-15 | CHEN XIN; HUNT TIMOTHY L; KOH JOOHYUN; LI MING-JUN; NOLAN DANIEL A |
| A method for making low PMD fiber comprising the steps of: (i) making an initial fiber preform; (ii) modifying said initial fiber preform to introduce higher birefringence than that of the initial fiber preform into modified preform; and (iii) drawing an optical fiber from the modified preform and bi-directionally spinning the drawn fiber during draw. | ||||||
| 148 | OPTICAL FIBERS WITH VERY LONG POLARIZATION CORRELATION LENGTH AND METHOD FOR OBTAINING OPTICAL FIBERS WITH VERY LONG POLARIZATION CORRELATION LENGTH | PCT/IT2005000383 | 2005-07-06 | WO2006006192B1 | 2006-03-16 | GALTAROSSA ANDREA; GRIGGIO PAOLA; PALMIERI LUCA; PIZZINAT ANNA; SCHENATO LUCA |
| A method for determining at least a parameter of an almost periodic spin function, a(z), to be applied to an optical fiber during the drawing by means of a spinning process, such that the polarization correlation length | ||||||
| 149 | METHOD FOR PRODUCING AN OPTICAL FIBRE TELECOMMUNICATIONS CABLE WITH REDUCED POLARIZATION MODE DISPERSION | PCT/EP0114760 | 2001-12-14 | WO02053117A3 | 2003-08-28 | COCCHINI FRANCO; MAZZOTTI ANDREA; CAVALLARO ALFONSO; DI NOLA FRANCESCO |
| An optical cable (1) for telecommunications comprises an optical core (2) and a plurality of protecting and reinforcing elements or layers (7, 11 and 13) placed around the optical core, the optical core (2) comprising, in turn, a central reinforcing element (4), a polymer layer (5), a plurality of optical fibres (3) incorporated in the polymer layer (5) and a thin sheath (6) which covers the polymer layer (5), the optical fibres having an alternating spin about their own axes with a maximum value of at least 4 twists per metre, and comprising a core (12) having a mean ellipticity in the range from 0.25 to 0.55, in such a way that the effects of birefringence of the fibres caused by the cabling process are significantly reduced. | ||||||
| 150 | OPTICAL FIBER AND METHOD OF MAKING OPTICAL FIBER | PCT/US0223675 | 2002-07-24 | WO03012503A3 | 2003-08-07 | BERKEY GEORGE E |
| An optical waveguide fiber suitable for making a spliced connection between two dissimilar optical waveguide fibers and the method of making the fiber. | ||||||
| 151 | Optical fiber preform, method for producing optical fiber, and optical fiber | US14569987 | 2014-12-15 | US09229160B2 | 2016-01-05 | Yoshiaki Tamura; Tetsuya Haruna; Masaaki Hirano |
| An easily producible optical fiber preform which is drawn to an optical fiber having a core containing a sufficient concentration of alkali metal is provided. An optical fiber preform 10 is composed of silica-based glass and includes a core portion 20 and a cladding portion 30. The core portion 20 includes a first core portion 21 including a central axis and a second core portion 22 disposed on the perimeter of the first core portion 21. The cladding portion 30 includes a first cladding portion 31 disposed on the perimeter of the second core portion 22 and a second cladding portion 32 disposed on the perimeter of the first cladding portion 31. The core portion 20 contains an alkali metal at an average concentration of 5 atomic ppm or more. The concentration of the OH group in the perimeter portion of the first cladding portion 31 is 200 mol ppm or more. | ||||||
| 152 | MANUFACTURING METHOD AND MANUFACTURING APPARATUS OF OPTICAL FIBER | US14679402 | 2015-04-06 | US20150285994A1 | 2015-10-08 | Kenji OKADA |
| A manufacturing method of an optical fiber includes: heating and melting an optical fiber preform; drawing a bare optical fiber from a heated and melted portion of the optical fiber preform; cooling the bare optical fiber drawn from the optical fiber preform; forming a coating layer on a surface of the cooled bare optical fiber; obtaining an optical fiber by curing the coating layer; adding torsion to the optical fiber by transmitting the torsion up to the heated and melted portion through the bare optical fiber from the optical fiber so that spin is applied to the bare optical fiber; and winding the optical fiber. | ||||||
| 153 | Optical fiber guide device | US13824999 | 2011-11-08 | US09031374B2 | 2015-05-12 | Francois Corso |
| The invention relates to a device for guiding an optical fiber (2), which is intended to be mounted on a vertical tower (T) for manufacturing an optical fiber (2), the fiber being produced from an oven (18) located at the upper portion of the tower (T) and being moved vertically downward relative to the tower (T), the guide device (1) being located downstream of the oven (18), the device including: a first guide pulley (10), at least one surface (1220) for twisting the fiber (2), which is located downstream of the first guide pulley (10), a second guide pulley (14) located downstream of the at least one surface (1220) for twisting the fiber (2), and a deflecting pulley (16), the distance (C) between the first guide pulley (10) and the at least one surface for twisting the fiber (1220) being greater than the distance (D) between the at least one surface for twisting the fiber (1220) and the second pulley (14), the device being characterized in that it timber includes a second surface (1222) for twisting the optical fiber (2), wherein the two surfaces (1220, 1222) for twisting the optical fiber (2) are the two sides of a groove formed in a single twisting pulley (122). | ||||||
| 154 | Coated optical fiber producing apparatus and coated optical fiber producing method | US12996310 | 2009-03-11 | US08756906B2 | 2014-06-24 | Tetsuya Hayashi |
| An upstream twisting inhibiting roller, a twist non-inhibiting roller, a twist provider and a downstream twist inhibiting roller are provided in this order along the path line of a coated optical fiber. The twist provider provides the twist to the coated optical fiber. The upstream twist inhibiting roller and the downstream twist inhibiting roller respectively inhibit a rotation of the coated optical fiber around the axis of the coated optical fiber. The twist non-inhibiting roller does not inhibit the rotation of the coated optical fiber around the axis of the coated optical fiber. | ||||||
| 155 | Relational database management system having integrated non-relational multi-dimensional data store of aggregated data elements | US12384093 | 2009-03-31 | US08463736B2 | 2013-06-11 | 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. decreased 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. | ||||||
| 156 | Method of making a low PMD optical fiber | US12308269 | 2006-06-22 | US08443631B2 | 2013-05-21 | 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. | ||||||
| 157 | METHODS AND SYSTEMS FOR PREDICTING AN OPTICAL FIBER PERFORMANCE PARAMETER | US13306427 | 2011-11-29 | US20120084057A1 | 2012-04-05 | John A. Fee |
| A method for predicting an optical fiber performance parameter includes measuring N values for the optical fiber performance parameter at N stages during manufacture or installation of a first optical fiber, where N is an integer. A first set of correlation values is generated representing shifts in the measured optical fiber performance parameter values at the N stages. An installed value of the optical fiber performance parameter is estimated for a second optical fiber based on the first set of generated correlation values and at least one measured optical fiber performance parameter value associated with the second optical fiber. | ||||||
| 158 | Methods and systems for controlling fiber polarization mode dispersion (PMD) | US12032368 | 2008-02-15 | US08103139B2 | 2012-01-24 | John A. Fee |
| A method is provided for predicting an installed performance parameter of an optical fiber cable. The method includes obtaining a measurement indicative of a value of the performance parameter at a first moment in time. A measurement indicative of a value of the performance parameter at a second moment in time may then be obtained. A first correlation may then be determined between the measurement at the first moment in time and the measurement at the second moment in time. A value of the performance parameter at the second moment in time may then be estimated based upon the measurement at the first moment in time in combination with the first correlation, the first correlation being based upon observations of a manner in which the performance parameter varies over time for at least a second optical fiber. | ||||||
| 159 | METHOD OF MANUFACTURING OPTICAL FIBER | US13226909 | 2011-09-07 | US20110314873A1 | 2011-12-29 | MINSUK SONG; Shinichi Arai |
| A coating is applied on an optical fiber drawn from a melted tip of an optical-fiber preform. A glass spin is applied to a coated optical fiber by gripping the coated optical fiber with at least a pair of spinning applying rollers arranged in different levels with parallel rotation axes, rotating the spinning applying rollers so that the coated optical fiber is guided in a predetermined direction, and alternately shifting the spinning applying rollers in opposite directions along the rotation axes. The glass spin is applied to the coated optical fiber in a state in which each of the rotation axes is tilted at a predetermined angle from a plane perpendicular to the first direction. | ||||||
| 160 | COATED OPTICAL FIBER PRODUCING APPARATUS AND COATED OPTICAL FIBER PRODUCING METHOD | US12996310 | 2009-03-11 | US20110081481A1 | 2011-04-07 | Tetsuya Hayashi |
| The present invention relates to an apparatus and method of producing coated optical fiber in which polarization mode dispersion is sufficiently reduced by providing a sufficient amount of twist thereto. An upstream twisting inhibiting roller (11), a twist non-inhibiting roller (12), a twist provider (13) and a downstream twist inhibiting roller (14) are provided in this order along the path line of a coated optical fiber (1). The twist provider (13) provides the twist to the coated optical fiber (1). The upstream twist inhibiting roller (11) and the downstream twist inhibiting roller (14) respectively inhibit a rotation of the coated optical fiber (1) around the axis of the coated optical fiber (1). The twist non-inhibiting roller (12) functions so as to adjust the path line length of the coated optical fiber (1) located between the upstream twist inhibiting roller (11) and the twist provider (13), and does not inhibit the rotation of the coated optical fiber (1) around the axis of the coated optical fiber (1). | ||||||
QQ群二维码
意见反馈
意见反馈