Loose Tube Type Patents (Class 385/109)
  • Patent number: 8571368
    Abstract: There are provided optical fiber configurations that provide for the delivery of laser energy, and in particular, the transmission and delivery of high power laser energy over great distances. These configurations further are hardened to protect the optical fibers from the stresses and conditions of an intended application. The configurations provide means for determining the additional fiber length (AFL) need to obtain the benefits of such additional fiber, while avoiding bending losses.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: October 29, 2013
    Assignee: Foro Energy, Inc.
    Inventors: Charles C. Rinzler, Mark S. Zediker
  • Patent number: 8542966
    Abstract: Disclosed are fiber optic assemblies having at least one optical fiber disposed within a tube and/or cavity along with a powder or powder blend that is at least partially mechanically attached thereto. In one embodiment, the powder or powder blend includes a water-swellable component that is mechanically attached to about 30 percent or less of the surface area of the tube wall while still effectively blocking the migration of water along the tube. Other embodiments may have the powder or power blend mechanically attached to the tube, cavity, or the like at relatively high percentage levels of the total powder or powder blend within the assembly, thereby inhibiting unintentional migration along the tube, cavity, or the like. Other embodiments may use powder or powder blends that may or may not include a water-swellable powder to provide other desired characteristics.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: September 24, 2013
    Assignee: Corning Cable Systems LLC
    Inventors: Anne G. Bringuier, Rodney M. Burns, John A. Rowe, Catharina L. Tedder, Brian S. Witz
  • Publication number: 20130209045
    Abstract: A fiber optic cable includes a first optical fiber, a jacket, and a second optical fiber. The first optical fiber includes a glass core and cladding. The glass core is configured to provide controlled transmission of light through the fiber optic cable for high-speed data communication. The jacket has an interior surface that defines a conduit through which the first optical fiber extends. The jacket further has an exterior surface that defines the outside of the fiber optic cable. The second optical fiber is integrated with the exterior surface of the jacket.
    Type: Application
    Filed: March 27, 2012
    Publication date: August 15, 2013
    Inventors: David L. Dean, JR., William C. Hurley
  • Publication number: 20130208283
    Abstract: Variable Sensitivity optical sensors can have a respective actual sensitivity of one or more portions of the sensor corresponding, at least in part, to a selected environment of each respective sensor portion. Some disclosed sensors have a plurality of optical conduits extending longitudinally of the sensors. At least one of the optical conduits can have at least one longitudinally extending segment having one or more optical and/or mechanical properties that differs from the optical properties of an adjacent longitudinally extending segment, providing the conduit with longitudinally varying signal propagation characteristics. An optical sensor having such optical conduits can exhibit a longitudinally varying actual sensitivity. Nonetheless, such a sensor can exhibit a substantially constant apparent sensitivity, e.g., when each respective portion of the sensor exhibits an actual sensitivity corresponding to a selected environment.
    Type: Application
    Filed: September 21, 2011
    Publication date: August 15, 2013
    Applicant: FIBER SENSYS, INC.
    Inventor: Edward Tapanes
  • Publication number: 20130209044
    Abstract: The present invention relates to loose-tube optical-fiber cables that are capable of operating in high-temperature environments.
    Type: Application
    Filed: February 15, 2013
    Publication date: August 15, 2013
    Applicant: DRAKA COMTEQ, B.V.
    Inventor: Draka Comteq, B.V.
  • Patent number: 8498509
    Abstract: The invention relates to a flat telecommunication cable in which optical fibers are positioned within micromodules. The micromodules are coupled to a surrounding, ribbon-like cable jacket, thereby preventing the micromodules from sagging within the cable during vertical installations. The invention also relates to a method of extracting optical fibers from such a cable.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: July 30, 2013
    Assignee: Draka Comteq B.V.
    Inventor: Olivier Tatat
  • Patent number: 8494327
    Abstract: A fiber optic cable includes a plurality of optical fiber subunits, each of the subunits including four fiber optic elements and an enclosing jacket. A plurality of optical fiber subunit assemblies are also included, each of which includes a plurality of the optical fiber subunits and an enclosing micro-sheath. The subunits are stranded around one another. A sheath encloses the plurality of optical fiber subunit assemblies.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: July 23, 2013
    Assignee: Nexans
    Inventors: David Keller, Jeff Rosenquist
  • Patent number: 8494326
    Abstract: A telecommunication cable is equipped with at least one optical fiber coated by a tight buffer layer made from a polymeric material having an ultimate elongation equal to or lower than 100% and an ultimate tensile strength equal to or lower than 10 MPa. The above combination of features of the polymeric material forming the buffer layer provides an optical fiber which is effectively protected during installation operations and during use, and at the same time can be easily stripped by an installer without using any stripping tools, simply by applying a small pressure with his fingertips and a moderate tearing force along the fiber axis.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: July 23, 2013
    Assignee: Prysmian S.p.A.
    Inventors: Enrico Consonni, Davide Ceschiat
  • Patent number: 8478095
    Abstract: This optical fiber cable is provided with a covering resin including an outermost layer. The outermost layer is formed by a resin composition including: (a) a base resin prepared by adding at least one copolymer selected from an ethylene-vinyl acetate copolymer and an ethylene-ethyl acrylate copolymer to a high density polyethylene; (b) 25 to 90 parts by weight of a phosphate salt with respect to 100 parts by weight of the base resin; and (c) 0.75 to 15 parts by weight of either a silicone dispersed polyethylene or a silicone grafted polyethylene with respect to 100 parts by weight of the base resin.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: July 2, 2013
    Assignees: Fujikura Ltd., Nippon Telegraph and Telephone Corporation
    Inventors: Daiki Takeda, Naoki Okada, Satoru Shiobara, Tadayoshi Sayama, Shimei Tanaka, Katsuyoshi Endoh, Keiichiro Sugimoto, Shinichi Niwa
  • Publication number: 20130163940
    Abstract: An optical cable includes an optical fiber, a primary coating coated on the optical fiber, and an outer coating coated on the primary coating. The optical cable is spiral, and can be compressed or stretched. The outer coating comprises about 40 to 70 weight percent of caoutchouc, about 20 to 50 weight percent of neoprene, about 0 to 6 weight percent of magnesium oxide, about 0 to 6 weight percent of zinc oxide, and about 0 to 6 weight percent of vulcanization accelerator.
    Type: Application
    Filed: August 28, 2012
    Publication date: June 27, 2013
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: I-THUN LIN
  • Patent number: 8463096
    Abstract: Described are track-resistant all dielectric self-supporting (TR-ADSS) cables with improved cable jackets. A typical TR-ADSS optical fiber cable comprises an optical fiber sub-assembly, and a cable jacket system. The cable jacket system comprises an inner jacket, an aramid strength layer and an outer jacket. The improvement in the cable jacket system results from the addition of a friction layer between the aramid strength layer and the outer jacket. The friction layer prevents unwanted slippage of the outer jacket with respect to the inner portions of the cable.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: June 11, 2013
    Assignee: OFS Fitel, LLC
    Inventors: Peter A. Weimann, Robert Arthur Williams
  • Patent number: 8463095
    Abstract: Cables have dielectric armor with an armor profile that resembles conventional metal armored cable. The dielectric armor provides additional crush and impact resistance for the optical fibers and/or fiber optic assembly therein. The armored cables recover substantially from deformation caused by crush loads. Additionally, the armored fiber optic assemblies can have any suitable flame and/or smoke rating for meeting the requirements of the intended space.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: June 11, 2013
    Assignee: Corning Cable Systems LLC
    Inventors: Gregory B. Bohler, Julian L. Greenwood, III, Keith A. Greer, Wesley B. Nicholson, James A. Register, III, Kimberly D. Slan
  • Publication number: 20130142492
    Abstract: A device (1) for connecting together tubes (101, 102) for protecting an optical fiber cable (103), the device comprising a tubular body (2) defining a channel (3) having a first housing (4.1) and a second housing (4.2) each arranged to receive one of the tubes and provided with means (5) for sealed retention of said tube, and an annular step (9) extending between the housings to form an abutment against penetration of the tubes into the housings, an annular sealing element (10) being arranged in the first housing beside a flank of the step and being arranged to be taken, under the effect of axial compression exerted by the tube, from a first state in which the sealing element defines a section through which the cable can pass freely to a second state in which the sealing element defines a section less than a section of the cable. A segment, of an optical transmission circuit including such a connection device.
    Type: Application
    Filed: May 11, 2011
    Publication date: June 6, 2013
    Applicant: Parker Hannifin Manufacturing France SAS
    Inventor: Philippe Le Quere
  • Patent number: 8435235
    Abstract: An apparatus for treating a hollow anatomical structure can include a light delivery device. The light delivery device comprises an optical fiber that is located in a lumen of a shaft suitable for insertion into the hollow anatomical structure and has a fiber tip located proximal of a distal end of the shaft during treatment of the hollow anatomical structure. The apparatus can further include a liquid source for providing a liquid flow over the optical fiber at a predetermined liquid flow rate.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: May 7, 2013
    Assignee: Covidien LP
    Inventors: Walter J. Stevens, Stephen W. Lee, Sr., Michael S. Mirizzi, Hoa D. Nguyen
  • Patent number: 8412012
    Abstract: An optical fiber cable includes an unbuffered optical fiber, a tensile reinforcement member surrounding the unbuffered optical fiber, and a jacket surrounding the tensile reinforcement member. The jacket is suitable for outside plant environment. A water blocking material is placed between the unbuffered fiber and the jacket. The unbuffered optical fiber comprises an ultra bend-insensitive fiber that meets the requirements of ITU-T G.657.B3 and exhibits an additional loss of less than approximately 0.2 dB/turn when the fiber is wrapped around a 5 mm bend radius mandrel. The optical fiber cable also exhibits an additional loss of less than approximately 0.4 dB/km at 1550 nm when the cable is subjected to ?20° C. outside plant environment.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: April 2, 2013
    Assignee: OFS Fitel, LLC
    Inventors: Stefan Jost, Elmar Staudinger, Peter A. Weimann
  • Patent number: 8406590
    Abstract: A method and apparatus for manufacturing an optical cable comprising at least one metal tube housing at least one optical fiber and having a predetermined excess fiber length (EFL) is described. In this method the metal tube is plastically deformed and shortened by a predetermined amount (St) greater than the predetermined EFL and is plastically deformed after shortening to provide a controlled elongation thereof so as to reach the predetermined excess fiber length. An optical cable so manufactured has a local excess fiber length (EFL) varying of or less than 0.2% along the longitudinal extension of the cable with respect to an average EFL of the cable.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: March 26, 2013
    Assignee: Prysmian Cavi e Sistemi Energia S.r.l.
    Inventors: Luis Sales Casals, Flavio Sangalli, Francesco Della Corte, Alessandro Ginocchio
  • Patent number: 8406591
    Abstract: A low cost, high performance, low profile flexible reinforcement member that can be used for both optical and copper communications cable. The reinforcement members made according to the preferred process are more rigid than known reinforcement members, but are less rigid than glass pultruded rods. Communications cables utilizing these members are lightweight and exhibit an improved combination of strength and flexibility compared to traditional communications cables. Further, these communication cables may then be installed into underground ducts using more economical and faster installation techniques.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: March 26, 2013
    Assignee: Neptco JV, LLC
    Inventors: Thomas P. Hager, Richard N. Lehman, James R. Priest
  • Patent number: 8388242
    Abstract: A fiber optic cable assembly includes a connector and a fiber optic cable. The connector includes a housing having a first axial end and an oppositely disposed second axial end. A ferrule is disposed in the housing. A plurality of optical fibers is mounted in the ferrule. The fiber optic cable includes an outer jacket defining a fiber passage that extends longitudinally through the outer jacket and a window that extends through the outer jacket and the fiber passage. First and second strength members are oppositely disposed about the fiber passage in the outer jacket. A plurality of optical fibers is disposed in the fiber passage. The optical fibers are joined at splices to the optical fibers of the connector. A splice sleeve is disposed over the splices. The splice sleeve is disposed in the window of the outer jacket.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: March 5, 2013
    Assignee: ADC Telecommunications, Inc.
    Inventors: Wayne M. Kachmar, Ronald J. Kleckowski
  • Patent number: 8391663
    Abstract: A rack cabling system including a rack having mounted thereon a first hardware component and a patch panel housing mounted on the rack adjacent the first hardware component. The patch panel housing populates no more than a three rack unit (RU space), the patch panel housing including a front end having cable pathway openings and a rear end having connector coupler plates mounted therein. The patch panel may have a first cable pathway opening located adjacent the first side of the housing and defining a primary position and a first connector coupler plate mounted on the rear adjacent on the first side and the first connector plate having a first position corresponding to the primary position of the first cable pathway opening. Cable harnesses are routed with less than three bends of the cables between the first hardware component and the patch panel housing, so that the first cable harness is terminated at the first coupler plate in the first position.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: March 5, 2013
    Assignee: Methode Electronics, Inc.
    Inventors: Michael R. Carter, David E. Hildreth, Tyler M. Miller, Robert C. Neumann
  • Publication number: 20130051744
    Abstract: A method of classifying a graded-index multimode optical fiber includes taking a series of individual measurements at a single wavelength, and using the measurements to characterize the departure of the multimode optical fiber's actual index profile from the corresponding nominal index profile. The measurements, coupled with intermodal dispersion or EMB measurement, may be used to predict the approximate transmission properties of the optical fiber at wavelengths other than the measurement wavelength. It is desirable for a graded-index multimode optical fiber to possess, at a wavelength of 850 nanometers, a radial offset bandwidth of at least 6000 MHz·km for all radial offsets between 0 and about 70 percent of the radius of the optical fiber's core.
    Type: Application
    Filed: September 5, 2012
    Publication date: February 28, 2013
    Applicant: DRAKA COMTEQ B.V.
    Inventors: Asghar Gholami, Denis Molin, Pierre Sillard, Yves Lumineau
  • Publication number: 20130051745
    Abstract: Certain embodiments of the invention may include a plenum-rated optical fiber cables utilizing yarn coated with a flame-retarding and smoke-suppressing. According to an example embodiment of the invention, a plenum-rated optical fiber cable is provided. The plenum-rated optical fiber cable includes an optical fiber, a jacket surrounding the optical fiber, and a layer of yarn positioned between the optical fiber and the jacket. The jacket is made from a low-smoke polymer, the yarn is coated with a sufficient amount of flame-retarding and smoke-suppressing material such that the cable passes the NFPA 262 “Steiner Tunnel” fire test, whereby its flame spread is less than 5 feet, peak optical density is less than 0.50, and average optical density is less than 0.15.
    Type: Application
    Filed: August 30, 2011
    Publication date: February 28, 2013
    Inventor: Peter A. Weimann
  • Patent number: 8380030
    Abstract: A bend-insensitive optical cable for transmitting optical signals includes an optical cable having a length, extending from an input end adapted to receive the optical signals, to an output end and including at least one single-mode optical fiber having a cable cut-off wavelength, of 1290 nm to 1650 nm. The at least one optical fiber is helically twisted around a longitudinal axis with a twisting pitch, for a twisted length, extending along at least a portion of the length, of the optical cable, wherein the twisted length and the twisting pitch are selected such that the optical cable exhibits a measured cut-off wavelength equal to or lower than 1260 nm. Preferably, the at least one fiber has a mode-field diameter of 8.6 ?m to 9.5 ?m. According to a preferred embodiment, the optical cable includes two optical fibers twisted together along the longitudinal axis, each of the two optical fibers having a cable cut-off wavelength of 1290 nm to 1650 nm.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: February 19, 2013
    Assignee: Prysmian S.p.A.
    Inventors: Marco Ruzzier, Francesco Sartori, Enrico Consonni, Daniele Cuomo
  • Publication number: 20130034331
    Abstract: An apparatus for connecting buffer tubes including a first block, a second block, and a fastener for assembling said first and second blocks. The blocks contain a pair of tube grooves and a cavity and a and a hole leading into the cavity. A sealant is then inserted into the cavities and allowed to cure.
    Type: Application
    Filed: August 2, 2011
    Publication date: February 7, 2013
    Applicant: AFL TELECOMMUNICATIONS, LLC
    Inventor: David Reeve
  • Patent number: 8369667
    Abstract: Downhole cables are described that are configured to protect internal structures that may be detrimentally impacted by exposure to the downhole environment, by protecting such structures by at least two protective layers. In some examples, the structures to be protected may be housed in a protective tube housed within the protective outer sheath. The described configuration enables the use of structures such as polymer fibers in the cables for strength and load-bearing capability by protecting the fibers, by multiple protective layers, from exposure to gases or fluids within a wellbore.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: February 5, 2013
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Lawrence Charles Rose
  • Patent number: 8369668
    Abstract: A fiber optic cable can inhibit water that may inadvertently enter the cable from flowing lengthwise within the cable. The fiber optic cable can include a buffer tube defining an interior volume extending along the cable. Water blocking barriers can be disposed in the buffer tube intermittently along the length of the cable. The barriers can be formed from a UV and thermal cured material and can comprise an acrylic. The barriers can be applied to the optical fibers or to a carrier tape that is wrapped around the optical fibers or fiber bundle. The barriers (or carrier tape) can be disposed against and/or adhere to an inner surface of the buffer tube to provide intermittent water blocking. Each barrier can provide a seal around the optical fibers and can limit flow of water in the interior volume.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: February 5, 2013
    Assignee: Superior Essex Communications LP
    Inventors: Christopher W. McNutt, James J. Puzan
  • Patent number: 8363994
    Abstract: A fiber optic cable assembly includes an outer jacket defining a first passage and a second passage disposed adjacent to the first passage. The outer jacket includes a wall disposed between an outer surface of the outer jacket and the first passage. A plurality of optical fibers is disposed in the first passage. A reinforcing member is disposed in the second passage. An access member is disposed in the wall of the outer jacket.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: January 29, 2013
    Assignee: ADC Telecommunications, Inc.
    Inventor: Wayne M. Kachmar
  • Patent number: 8358894
    Abstract: A optical fiber includes an optically transmissive element; at least one curable colored layer surrounding the optically transmissive element; and an additional removable colored layer surrounding and homogeneously covering the curable colored layer. The presence of the additional removable colored layer improves identifiability of the fiber, especially when the latter is included in an optical cable together with other fibers.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: January 22, 2013
    Assignee: Prysmian S.p.A.
    Inventors: Josep Martin-Regalado, Josep Maria Batlle i Ferrer, Raul Gil, Valentina Ghinaglia
  • Patent number: 8351746
    Abstract: The present invention relates to an optical fiber cable with improved waterproof performance comprising: at least one tensile members; optical fiber units including at least one optical fiber cores; at least one buffer tube surrounding the optical fiber units; sheath covering the buffer tube and the tensile member to form a outer jacket of the cable, wherein a waterproof yarn is inserted longitudinally in the buffer tube with the optical fiber unit, and the thickness of the waterproof yarn is from 300 to 3,000 deniers, and tensile strength of the waterproof yarn is from 3 N to 150 N, and elongation rate of the waterproof yarn is from 5% to 45%, and water absorption rate of the waterproof yarn is at least 20 g/g. By the optical fiber cable, improve waterproof performance can be improved, and by minimizing the tensile strength of the waterproof yarn, possibility of break can be reduced.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: January 8, 2013
    Assignee: LS Cable & System Ltd.
    Inventors: Tae Gyoung Kim, Son Min
  • Publication number: 20120308185
    Abstract: An underwater optical fibre cable includes two end portions, an extruded metal tube, at least one optical fibre and a polymeric sheath surrounding the extruded metal tube. The at least one optical fibre is housed in loose configuration in the extruded metal tube. The cable includes a controlled cathodic protection system connected to one of the end portions of the underwater cable and includes an anode bed arranged outside the underwater cable and an electric connection connecting the anode bed to the extruded metal tube of the underwater cable at one of the end portions of the underwater cable.
    Type: Application
    Filed: December 22, 2009
    Publication date: December 6, 2012
    Inventors: Pietro Anelli, Vincenzo Crisci, Giovanni Pozzati, Rodolfo Sica
  • Publication number: 20120308186
    Abstract: A transfer member assembly 2 comprises a transfer member 4 for the transfer of a signal, power or fluid such as an optical fibre, an electrical conductor or a gas or hydraulic line. The transfer member assembly 2 comprises a shroud 6 formed around the transfer member 4 and a composite material 8 comprising a matrix formed around the shroud 6. The composite material 8 comprises longitudinal fibres in a resin matrix. The resin matrix penetrates at least part-way into the shroud 6. The penetration of the matrix into the shroud 6 is controlled during manufacture of the transfer member assembly 2, for example by controlling shroud permeability or by controlling the resin viscosity or pressure utilised in a pultrusion process utilised to form the composite.
    Type: Application
    Filed: February 18, 2011
    Publication date: December 6, 2012
    Inventor: Andre Martin Van der Ende
  • Publication number: 20120301091
    Abstract: A cable including an inner cable, an outer jacket surrounding the inner cable, and at least one semi-conducting tracking resistant material strip provided in the outer jacket.
    Type: Application
    Filed: January 31, 2012
    Publication date: November 29, 2012
    Applicant: AFL TELECOMMUNICATIONS LLC
    Inventor: Patrick E. Dobbins
  • Patent number: 8317410
    Abstract: This disclosure describes techniques for attaching a connector to a fiber optic cable. As described herein, lengthwise slits are made into the jacket and the buffer tube of a fiber optic cable, thereby exposing interior segments of the optical fibers of the fiber optic cable. A loop is then made in the fiber optic cable at the slits. The ends of the optical fibers can then telescopically slide out the end of the fiber optic cable. When this happens, the exposed interior segments of the optical fibers slide out of the buffer tube and the jacket through the slits, forming a smaller loop within the loop. A connector may then be attached to the exposed ends of the optical fibers. When the fiber optic cable is unlooped, the exposed interior segments of the optical fibers slide back into the buffer tube and jacket. The jacket may then be resealed.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: November 27, 2012
    Assignee: ADC Telecommunications, Inc.
    Inventor: Thomas Marcouiller
  • Patent number: 8306377
    Abstract: A loose tube fiber optic cable having at least one optical fiber, a loose tube surrounding the fiber, with the tube having an irregular inner surface. A water swellable powder is provided around the fiber and inside the tube, where the particles of the water swellable powder rest in the irregular inner surface of the tube.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: November 6, 2012
    Assignee: Nexans
    Inventors: David Keller, Jeff Rosenquist, Robert Pruitt, Allen L. Jones
  • Patent number: 8295665
    Abstract: Provided is a method of manufacturing a downhole cable, the method including, forming a helical shape in an outer circumferential surface of a metal tube, the metal tube having a fiber element housed therein, and stranding a copper element in a helical space formed by the metallic tube. Also provided is a downhole cable including, a metallic tube having a helical space in an outer circumferential surface thereof, wherein the metallic tube has a fiber element housed therein, and a copper element disposed in a helical space formed by the steel tube. Double-tube and multi-tube configurations of the downhole cable are also provided.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: October 23, 2012
    Assignee: AFL Telecommunications LLC
    Inventor: Brian Herbst
  • Patent number: 8290320
    Abstract: An example fiber optic cable includes an outer jacket having an elongated transverse cross-sectional profile defining a major axis and a minor axis. The transverse cross-sectional profile has a maximum width that extends along the major axis and a maximum thickness that extends along the minor axis. The maximum width of the transverse cross-sectional profile is longer than the maximum thickness of the transverse cross-sectional profile. The outer jacket also defines first and second separate passages that extend through the outer jacket along a lengthwise axis of the outer jacket. The second passage has a transverse cross-sectional profile that is elongated in an orientation extending along the major axis of the outer jacket. The fiber optic cable also includes a plurality of optical fibers positioned within the first passage a tensile strength member positioned within the second passage.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: October 16, 2012
    Assignee: ADC Telecommunications, Inc.
    Inventor: Wayne M. Kachmar
  • Publication number: 20120257863
    Abstract: A non-kink, non-hockling optical cable comprising an optical fiber capable of propagating light along its longitudinal axis. A buffer layer made of a soft plastic material surrounds the silica core and cladding, and a supplemental layer surrounds the buffer layer. The supplemental layer consists essentially of a liquid crystal polymer (LCP) material to enhance the tensile strength of the optical fiber. Finally, an encasing polymer layer with a breaking strain greater than 30%, surrounds the supplemental layer, to increase the flexibility of the optical cable.
    Type: Application
    Filed: March 20, 2012
    Publication date: October 11, 2012
    Inventors: Stephen M. O'RIORDEN, Amaresh MAHAPATRA
  • Publication number: 20120257864
    Abstract: It is disclosed an optical cable for communications including at least one micromodule, the micromodule including a retaining element and number N of optical fibers housed in said retaining element. The diameter of a circumference encircling the number N of optical fibers is typically 90% to 95% of an inner diameter of the retaining element. The retaining element consists essentially of a film grade polymeric material having an elongation at break equal to or higher than 500%, a melt flow index (MFI) lower than 3 g/10 min, and a density lower than 1 g/cm3.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 11, 2012
    Applicant: PRYSMIAN S.P.A.
    Inventors: Enrico Consonni, Davide Ceschiat, Silvio Frigerio, Flavio Tridello
  • Patent number: 8285094
    Abstract: The multicore fiber comprises 7 or more cores, wherein diameters of the adjacent cores differ from one another, wherein each of the cores performs single-mode propagation, wherein a relative refractive index difference of each of the cores is less than 1.4%, wherein a distance between the adjacent cores is less than 50 ?m, wherein, in a case where a transmission wavelength of each of the cores is ?, the distance between the adjacent cores is , a mode field diameter of each of the cores is MFD, and a theoretical cutoff wavelength of each of the cores is ?c, (/MFD)·(2?c/(?c+?))?3.95 is satisfied, and wherein a distance between the outer circumference of the coreand an outer circumference of the clad is 2.5 or higher times as long as the mode field diameter of each of the cores.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: October 9, 2012
    Assignee: Fujikura Ltd.
    Inventors: Katsuhiro Takenaga, Ning Guan, Syouji Tanigawa
  • Publication number: 20120243840
    Abstract: An optical fiber unit (1) includes a tube (2) having stretchability in the axial direction, an optical fiber (4) movably housed in the tube (2), and a linear body (3) formed of a material having less stretchability than the tube (2). Both ends of the linear body (3) are fixed to both end portions of the tube (2) in a state where the tube (2) has been previously shrunk in the axial direction.
    Type: Application
    Filed: March 21, 2012
    Publication date: September 27, 2012
    Applicant: MORI SEIKI CO., LTD.
    Inventor: Masayuki NIIYA
  • Publication number: 20120243841
    Abstract: Micromodule subunit cables are constructed to allow for ease of identification between optical fibers in differing groups of optical fibers. In one cable, a first group of fibers is located within a first subunit while a second group of fibers is located within a second subunit, both subunits being enclosed in a cable jacket.
    Type: Application
    Filed: June 7, 2012
    Publication date: September 27, 2012
    Inventors: William C. Hurley, Samuel D. Navé
  • Publication number: 20120243881
    Abstract: A fiber optic cable for use in a downhole environment is disclosed. The fiber optic cable includes a tube having an interior region; an optical fiber disposed in the interior region of the tube; a gas in the interior region; and a gel in the interior region, wherein the gel is configured to reduce stress on the optical fiber in the presence of the gas at a temperature substantially near the flashpoint of the gel. One or more seals can be used to seal the gel and the inert gas in the interior region. In various aspects, the fiber optic cable can be used in a downhole environment.
    Type: Application
    Filed: March 22, 2011
    Publication date: September 27, 2012
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Daniel S. Homa, Robert M. Harman, Christopher H. Lambert
  • Publication number: 20120213483
    Abstract: An optical-fiber interconnect cable includes one or more optical fibers and one or more electrical conductors surrounded by an outer jacket. The optical fibers, such a multimode optical fibers, are typically enclosed within a flexible polymeric tube to form a flexible subunit.
    Type: Application
    Filed: February 21, 2012
    Publication date: August 23, 2012
    Applicant: DRAKA COMTEQ B.V.
    Inventors: Brian G. Risch, John C. Rosko, Olivier Tatat
  • Patent number: 8238706
    Abstract: An example fiber optic cable includes an outer jacket having an elongated transverse cross-sectional profile defining a bowtie shape. The outer jacket defines at least first and second separate passages that extend through the outer jacket along a lengthwise axis of the outer jacket. The fiber optic cable includes a plurality of optical fibers positioned within the first passage and a tensile strength member positioned within the second passage. The tensile strength member has a highly flexible construction and a transverse cross-sectional profile that is elongated in the orientation extending along the major axis.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: August 7, 2012
    Assignee: ADC Telecommunications, Inc.
    Inventor: Wayne M. Kachmar
  • Publication number: 20120195559
    Abstract: Disclosed are fiber optic assemblies having at least one optical fiber disposed within a tube and/or cavity along with a powder or powder blend that is at least partially mechanically attached thereto. In one embodiment, the powder or powder blend includes a water-swellable component that is mechanically attached to about 30 percent or less of the surface area of the tube wall while still effectively blocking the migration of water along the tube. Other embodiments may have the powder or power blend mechanically attached to the tube, cavity, or the like at relatively high percentage levels of the total powder or powder blend within the assembly, thereby inhibiting unintentional migration along the tube, cavity, or the like. Other embodiments may use powder or powder blends that may or may not include a water-swellable powder to provide other desired characteristics.
    Type: Application
    Filed: April 11, 2012
    Publication date: August 2, 2012
    Inventors: Anne G. Bringuier, Rodney M. Burns, John A. Rowe, Catharina L. Tedder, Brian S. Witz
  • Patent number: 8229263
    Abstract: Disclosed is an optical fiber cable that includes optical fibers and a deformable coupling element enclosed within a buffer tube. The coupling element is formed from a deformable yet substantially incompressible material that is capable of releasably and intermittently coupling the optical fibers to the buffer tube in various orientations. The design of the coupling element layer permits coupling of the optical fibers to the buffer tube without the use of a compressive cushioning layer and yet permits localized movement the optical fibers relative to the buffer tube to account for disparate thermal expansion and to accommodate optical fiber placement.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: July 24, 2012
    Assignee: Draka Comiteq, B.V.
    Inventors: Don Parris, Greg DeChristopher, Justin Elisha Quinn
  • Patent number: 8213756
    Abstract: A breathable downhole fiber optic cable is provided having an outer protective tube; a fiber optic tube having a plurality of optical fibers contained therein; at least one annulus disposed between the outer protective tube and the fiber optic tube; and at least one path, extending through the length of the fiber optic cable, which provides a channel for a purge gas to flow for removing a second gas, such as hydrogen, from the fiber optic cable.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: July 3, 2012
    Assignee: AFL Telecommunications LLC
    Inventor: Brian Herbst
  • Patent number: 8208773
    Abstract: Disclosed is an optical fiber cable that includes optical fibers and a deformable coupling element enclosed within a buffer tube. The coupling element is formed from a deformable yet substantially incompressible material and features a number of raised members projecting toward the optical fibers. The design of the coupling element layer permits coupling of the optical fibers to the buffer tube without the use of a compressive cushioning layer. This arrangement distributes the compressive force applied to discrete points along the outer perimeter of the optical fiber element.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: June 26, 2012
    Assignee: Draka Comteq, B.V.
    Inventor: Don Parris
  • Patent number: 8189974
    Abstract: An optical fiber cable 1 includes: a cable core 9 formed by stranding a plurality of loose tubes 7, each housing at least one optical fiber 5, on the periphery of a centered tension member 3; and a sheath 11 disposed on the outer periphery of the cable core 9. The sheath 11 includes: a first sheath portion 13 in which the sheath is embedded in between each of the loose tubes 7; and a second sheath portion 15, in which the sheath 11 is circumscribed around the cable core 9, to be thereby formed in a pipe shape. The first sheath portion 13 and the second sheath portion 15 are alternately positioned over the entire length of the cable core 9.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: May 29, 2012
    Assignee: Fujikura Ltd.
    Inventors: Yoshio Hashimoto, Naoki Okada
  • Patent number: 8184935
    Abstract: The present disclosure relates to a fiber optic cable including an outer jacket having an elongated transverse cross-sectional profile defining a major axis and a minor axis. The transverse cross-sectional profile has a maximum width that extends along the major axis and a maximum thickness that extends along the minor axis. The maximum width of the transverse cross-sectional profile is longer than the maximum thickness of the transverse cross-sectional profile. The outer jacket also defines first, second and third separate passages that extend through the outer jacket along a lengthwise axis of the outer jacket. The third passage has a transverse cross-sectional profile that is elongated in an orientation extending along the major axis of the outer jacket. The first, second and third passages are generally aligned along the major axis with the third passage being positioned between the first and second passages.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: May 22, 2012
    Assignee: ADC Telecommunications, Inc.
    Inventor: Wayne M. Kachmar
  • Patent number: 8184934
    Abstract: A fiber optic cable having a jacket, at least one tube and at least two fibers within the tube in a loose tube arrangement. The fibers within the tube have a fiber length differential substantially in the range of 0.01%-0.04%.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: May 22, 2012
    Assignee: Nexans
    Inventors: David Keller, Norman Andrew Punch, Jr., Jerry Freeman, Bulent Kose, Jeff Rosenquist, Lisa Huff, Alfred Flores