Entries |
Document | Title | Date |
20080205830 | Method and apparatus for protecting optical fibers of a cable - A fiber optic cable can comprise loose spheres or balls disposed in the cable's interstitial spaces, for example between the cable's optical fibers and a surrounding buffer tube. The spheres can have a diameter in a range of 20 microns to 2.5 millimeters. The composition of the spheres can include a material that absorbs water, such as a super absorbent polymer (“SAP”). The SAP material can be distributed uniformly within each sphere. The spheres not only can provide a carrier to facilitate inserting SAP material in the cable during manufacturing, but also can cushion the cable's fibers when the cable is placed in service. When the cable receives stress, motion among the spheres can absorb the stress to shield the fibers from damage. | 08-28-2008 |
20080219627 | Fiber optic cable with enhanced saltwater performance - A fiber optic cable can inhibit water, that may inadvertently enter the cable, from damaging the cable's optical fibers. The fiber optic cable can comprise a buffer tube defining an interior volume extending along the fiber optic cable. Optical fibers can be disposed in the interior volume of the buffer tube, along with water-swellable materials, such as tapes and yarns. The interior volume can be dry or free from water-blocking gels or fluids. The water-swellable materials can provide the fiber optic cable with an unexpected level of protection from seawater. The water-swellable materials can, for example, limit flow of seawater along the interior volume. In an exemplary embodiment, progression of seawater in the interior volume be limited to three meters or less for a twenty four hour test period during which the seawater is under about one meter of head pressure. | 09-11-2008 |
20080267569 | Water-Blocked Optical Cable and Process for the Production Thereof - An optical cable for communication includes at least one retaining element blocked with respect to the water propagation as well as a process for manufacturing such an optical cable. The optical cable includes, in addition to the retaining element, at least two transmission elements housed within the retaining element and a water swellable yarn housed within the retaining element. The water swellable yarn is selected according to the following equation: | 10-30-2008 |
20080298755 | Communications Ducting System and Method of Laying Same - A communications ducting system, and method of laying a communications duct assembly below a surface, usually in a carriageway or footpath, using an open slot which is subsequently backfilled. The width of the slot is preferably not substantially greater than the narrowest outer cross sectional width of the duct assembly. In at least one direction, the duct assembly has a dimension of less than 20 mm and thus the slot need be no more than 20 mm wide. The duct assembly can be laid along the bottom of the slot, preferably on a layer of sand or other bedding material. Access chambers may provide fibre blowing points along the slot for installing optical fibre in the duct assembly after the assembly is in place, either for the original installation of the fibres or for repair purposes. The access chambers can also be used to accommodate changes in direction of the slot and for repairs in the duct assembly. | 12-04-2008 |
20090010602 | Semi-Tight Optical Fiber Unit - Disclosed is a dry, semi-tight optical fiber unit that includes one or more optical fibers positioned within a buffer tube. A protective coating is provided upon the surface of the optical fibers, and an anti-adhesive coating is substantially bonded to the protective coating. One or more of these optical fiber units may be included in an optical cable. Also disclosed is a method for efficiently producing such an optical fiber unit. | 01-08-2009 |
20090041414 | Method for Accessing Optical Fibers within a Telecommunication Cable - Disclosed is a method accessing one or more optical fibers in a telecommunication cable in a way that considerably reduces the risk of damaging the optical fibers. To avoid inadvertent damage caused by a cutting tool, the method includes moving optical fibers and/or micromodules away from the area on the cable that is to be cut. | 02-12-2009 |
20090129734 | Loose tube optical fiber cable design and method for making the same - 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. | 05-21-2009 |
20090257721 | Optical Transmission Element Having High Temperature Stability - An optical transmission element has a number of optical waveguides, which are arranged as a bundle and are embedded in a filling composition. The optical waveguides and the filling composition are surrounded by a tube. A material comprising a resin, which for example contains an acrylate enriched with a filler, is used as materials for the tube. By mixing photoinitiators into the material comprising the resin of the tube, the tube material of the tube can be cured by irradiation with ultraviolet light. The use of a material comprising resin in the production of the tube of the optical transmission element allows thin buffering layers to be produced at a high material processing speed. | 10-15-2009 |
20090263089 | Optical fiber cable - 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%. | 10-22-2009 |
20090297106 | Water-resistant optical cable and manufacturing method - A method for manufacturing an optical cable for communication includes at least one micromodule, said micromodule being blocked with respect to the propagation of water. The method includes the steps of providing at least one optical fiber; embedding the at least one optical fiber in a pseudoplastic filling compound having a viscosity of 3 Pa·s to 30 Pa·s, preferably 7 Pa·s to 25 Pa·s at a shear rate of 10 s | 12-03-2009 |
20090310924 | Attachment Structure Allowing Movement and Protection of a Tether of a Cable Assembly - A cable assembly comprising a fiber optic cable and one or more attachment points to allow one or more tethers to optically connect to optical fibers within the cable. The cable assembly may be used as a drop cable for extending optical connections to a plurality of points. An attachment structure is provided for maintaining the tether to the cable to prevent damage to the tether. The attachment structure provides a loose attachment to allow the tether to move relative to the distribution cable, so the tether can move in a generally translational movement, is able to slightly twist, and to have limited lateral movement during coiling, installation, and removal of the cable assembly. This loose attachment structure may prevent damage to the tether due to forces being placed on the cable, such as during coiling or uncoiling of the cable. In one exemplary embodiment, the attachment structure is attached to the cable and receives the tether. In another exemplary embodiment, the attachment structure include a protective covering. In another embodiment, both are employed in combination. | 12-17-2009 |
20100008632 | BREATHABLE DOWNHOLE FIBER OPTIC CABLE AND A METHOD OF RESTORING PERFORMANCE - 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. | 01-14-2010 |
20100046895 | BLOWN CABLE INSTALLATION - Apparatus for installing a cable into a tube with the assistance of a fluid drag acting on the cable within the tube, the apparatus including:—installation means for driving the cable into the tube, wherein in use the cable is resistant to being conveyed to the installation means, and—reduction means for reducing the conveyance resistance of the cable. | 02-25-2010 |
20100067855 | Buffer Tubes for Mid-Span Storage - Disclosed is a buffer tube that possesses a higher buffer-tube filling coefficient. Optical fibers enclosed within the buffer tube demonstrate improved attenuation performance when subjected to temperature variations between about −40° C. and 70° C. The buffer tube is suitable for deployments requiring mid-span access. | 03-18-2010 |
20100142903 | FIBER OPTIC CABLE SYSTEMS AND METHODS TO PREVENT HYDROGEN INGRESS - Purging interior regions of a cable reduces or prevents hydrogen darkening of an optical fiber located in the cable. While hydrogen may permeate through an outer surface of the cable, fluid circulating through the cable purges the hydrogen from within the cable. This circulation of the fluid occurs between an inner tube containing the fiber and an outer tube surrounding the inner tube. | 06-10-2010 |
20100150505 | Buffered Optical Fiber - A buffered optical fiber structure includes an optical fiber, a mechanical reinforcement member extending along the optical fiber, a protective sheath having a cavity containing the optical fiber and the mechanical reinforcement member, and an intermediate material contacting the protective sheath and surrounding the optical fiber and the mechanical reinforcement member. | 06-17-2010 |
20100232753 | Coupling Element for Optical Fiber Cables - The present invention relates to a novel coupling composition that is used within optical fiber cables to protect optical fibers and to couple the optical fibers and the surrounding buffer tube casing. The present invention also relates to optical fiber cables that use the novel coupling composition. | 09-16-2010 |
20100247045 | METHOD FOR EXTRUSION-MOLDING LOOSE TUBE AND APPARATUS THEREFOR, AND LOOSE TUBE - An extrusion-molding apparatus for a loose tube includes: an extrusion head that includes a tip and a die concentrically arranged therewithin and extrudes a tube between the tip and the die; a needle that feeds at least one optical fiber and filler to be filled around the optical fiber into the tube being extrusion-molded; and a cylindrical bundling member provided within the needle. The bundling member has a bundling hole being smaller than an inner diameter of the tube at a center thereof and into which the optical fiber can pass through, and a flow pass penetrating along a feeding direction of the filler between the bundling hole and an inner circumferential surface of the needle. In an extrusion molding method using the extrusion-molding apparatus, the optical fiber is passed through a bundling hole to be bundled at an almost center of the tube. In addition, filler is passed through a flow path to be filled around the optical fiber. | 09-30-2010 |
20110194825 | METHOD OF FORMING AN OPTICAL FIBER BUFFER TUBE - A method of forming an optical fiber buffer tube including the steps of providing a length of pre-shrunk tape having a predetermined width and thickness, forming the tape into a tube around at least one optical fiber, coating the formed tube with a molten material to close the tube, and cooling the molten material to maintain the shape of the tube. The method further includes calibrating the outer diameter of the coated tube during the cooling step by restraining the coated tube against outward radial expansion. An optical fiber buffer tube constructed according to the method is further provided. | 08-11-2011 |
20110235984 | OPTICAL FIBER COATING TO PREVENT ADHESION AT HIGH TEMPERATURES - Embodiments of the present invention provide methods and apparatus for cables having one or more fibers that may function as a sensing device within a wellbore, wherein the fibers do not adhere to each other or to an inner wall of the cable during a high temperature operation, such as in a thermal recovery operation that may last over 30 days. | 09-29-2011 |
20120014651 | MICRO-DISTRIBUTION CABLE FOR OPTICAL COMMUNICATIONS AND METHOD FOR PRODUCING A MICRO-DISTRIBUTION CABLE - The invention relates to a microdistribution cable ( | 01-19-2012 |
20120020631 | OPTICAL FIBER CONFIGURATIONS FOR TRANSMISSION OF LASER ENERGY OVER GREAT DISTANCES - 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. | 01-26-2012 |
20120076464 | FIBER OPTIC CABLE SYSTEMS AND METHODS TO PREVENT HYDROGEN INGRESS - Purging interior regions of a cable reduces or prevents hydrogen darkening of an optical fiber located in the cable. While hydrogen may permeate through an outer surface of the cable, fluid circulating through the cable purges the hydrogen from within the cable. This circulation of the fluid occurs between an inner tube containing the fiber and an outer tube surrounding the inner tube. | 03-29-2012 |
20120195559 | OPTICAL FIBER ASSEMBLIES HAVING A POWDER OR POWDER BLEND AT LEAST PARTIALLY MECHANICALLY ATTACHED - 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. | 08-02-2012 |
20120243840 | OPTICAL FIBER UNIT - An optical fiber unit ( | 09-27-2012 |
20120257863 | NON-KINK, NON-HOCKLING OPTICAL CABLE - 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. | 10-11-2012 |
20120301091 | ALL-DIELECTRIC SELF-SUPPORTING (ADSS) FIBER OPTIC CABLE WITH A SEMI-CONDUCTING CO-EXTRUDED TRACKING RESISTANT JACKET - 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. | 11-29-2012 |
20120308185 | UNDERWATER OPTICAL FIBRE CABLE - 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. | 12-06-2012 |
20120308186 | TRANSFER MEMBER ASSEMBLY - A transfer member assembly | 12-06-2012 |
20130034331 | APPARATUS AND METHOD FOR PREVENTING OPTICAL FIBER AND GEL FROM EJECTING OUT OF BUFFER TUBES IN FIBER OPTIC CABLES - 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. | 02-07-2013 |
20130051744 | Graded-Index Multimode Optical Fiber - 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. | 02-28-2013 |
20130142492 | Divice For Connecting Together Tubes For Protecting An Optical Fiber Cable, A Segment Of An Optical Transmission Circuit Including Such A Device, And A Sealing Element For Such A Device | 06-06-2013 |
20130163940 | OPTICAL CABLE AND METHOD FOR MANUFACTURING THE OPTICAL CABLE - 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. | 06-27-2013 |
20140079361 | Water-Swellable Element for Optical-Fiber Cables - An optical-fiber-cable structure includes an optical fiber surrounded by a protective polymeric tube. A water-blocking element is positioned between the optical fiber and the protective tube. The water-blocking element includes water-swellable particulate powder thermally bonded to a fibrous carrier element. | 03-20-2014 |
20140133813 | DYNAMIC CATERPULLER SYSTEM AND METHOD FOR MANUFACTURING BUFFER TUBES FOR FIBER OPTIC CABLES - A manufacturing line includes an extruder and a dynamic caterpuller system located after the extruder along the manufacturing line. During manufacturing, a fiber optic assembly is produced, where the fiber optic assembly includes a tube containing at least on optical fiber. The tube is extruded via the extruder and loaded via the dynamic caterpuller, which includes a closed pipe through which passes a liquid and the fiber optic assembly. The flow rate of the liquid is different than the speed of the fiber optic assembly through the pipe such that drag is imparted on the fiber optic assembly by the liquid. | 05-15-2014 |
20140233899 | OPTICAL TRUNK CABLE - A fiber optic cable comprises a plurality of elongated optical fiber units, each having an outer jacket containing multiple optical fibers. The optical fiber units are interconnected at intermittent bonding locations along an axial length of said trunk cable to form a sheathless bundle. The absence of a sheath makes the trunk cable thinner and lighter than typical trunk cable. In addition, each unit can serve as a horizontal cable at a selected branching location. | 08-21-2014 |
20140248025 | OPTICAL FIBER CONFIGURATIONS FOR TRANSMISSION OF LASER ENERGY OVER GREAT DISTANCES - 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. | 09-04-2014 |
20140254996 | GROOVED OPTICAL FIBER JACKET - An optical fiber is disclosed which includes a protective outer jacket. The outer protective jacket is grooved to include one or more peripheral grooves formed into the jacket. In operation of a laser device, laser energy passes through the optical fiber to the distal tip of the optical fiber. As the distal tip erodes, the outer protective jacket also erodes in a controlled fashion such that portions of the outer jacket flake off as the fiber tip erodes to the position of the peripheral grooves formed in the outer jacket rather than in a random fashion. | 09-11-2014 |
20150055920 | Perforated Water-Blocking Element - The present invention provides optical-fiber communication cables with an improved water-blocking element that reduces or eliminates microbending caused by the water-swellable particulate powders by employing such water-swellable powders in conjunction with a smooth but perforated compression-resistant carrier tape. The water-blocking element is deployed within optical-fiber buffer tubes to water-block the buffer tubes and to minimize microbending that can occur when water-swellable particulate powders press against optical fibers. | 02-26-2015 |
20150131953 | SYSTEM AND METHOD FOR PROVIDING FINAL DROP IN A LIVING UNIT IN A BUILDING - A cable routing system is described. More specifically, described is a cable routing system that includes a main fiber channel configured to receive a drop fiber to allow it to fit within the main fiber channel, where the channel is surrounded by a discontinuous segmented duct, and the duct comprises a continuous flange structure to provide support for the system as it is installed on or fastened to a wall or other generally flat surface. | 05-14-2015 |
20160054533 | OPTICAL FIBER CABLE WITH PRINT PROTECTIVE OUTER SURFACE PROFILE - An optical cable is provided. The optical cable includes a cable body having an outer surface and an inner surface defining a lumen and one or more optical transmission elements located within the lumen. The optical cable includes a groove array comprising a plurality of grooves located on the outer surface of the cable body. Each groove defines a trough having a lower surface located between peaks on either side of the trough, and the groove array includes an average groove spacing. The optical cable includes an ink layer applied to the cable body at the location of the groove array. The groove array and the ink layer are formed to limit abrasion experienced by the ink layer. | 02-25-2016 |
20160062035 | OPTICAL FIBER CABLE - An optical fiber cable includes a tubular sheath and a plurality of optical fibers disposed in the space of the sheath as the optical fibers are bent. In the plurality of optical fibers, at least one optical fiber is a multicore fiber. The multicore fiber satisfies an expression R | 03-03-2016 |
20220137312 | FIBRE OPTIC CABLE, METHODS OF MANUFACTURE AND USE THEREOF - A fibre optic cable ( | 05-05-2022 |