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Optical Waveguides > Optical Transmission Cable > Loose Tube Type

Loose Tube Type

Loose Tube Type patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

05/15/14 - 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...

03/20/14 - 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....

06/27/13 - 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...

06/06/13 - 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
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)...

02/28/13 - 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...

02/07/13 - 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...

12/06/12 - 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...

12/06/12 - 20120308186 - Transfer member assembly
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...

11/29/12 - 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....

10/11/12 - 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...

09/27/12 - 20120243840 - Optical fiber unit
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...

08/02/12 - 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...

03/29/12 - 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...

01/26/12 - 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...

01/19/12 - 20120014651 - Micro-distribution cable for optical communications and method for producing a micro-distribution cable
The invention relates to a microdistribution cable (1) for optical telecommunications engineering, comprising a loose tube cable (10), at least two wires (14) being guided in the loose tube cable (10), the wires (14) of the loose tube cable (10) having been prefabricated with plugs (33) at at least one...

09/29/11 - 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...

08/11/11 - 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...

09/30/10 - 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...

09/16/10 - 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....

06/17/10 - 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...

06/10/10 - 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...

03/18/10 - 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....

02/25/10 - 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...

01/14/10 - 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...

12/17/09 - 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...

12/03/09 - 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...

10/15/09 - 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,...

05/21/09 - 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...