Abstract: This application relates to a fibre optic cable (104, 300) suitable for use with a distributed fibre optic sensor apparatus (106). The fibre optic cable includes at least one optical fibre (301) and a force transformer (304) mechanically coupled to the at least one optical fibre. The cable may also include at least one cladding later (302) and/or a compliant material (303). The cable may be surrounded by a jacket layer (306). The force transformer (304) is configured to transform transverse forces due to dimension changes of the cable arising from a temperature variation of the cable into longitudinal forces to counteract the longitudinal component of said dimension change over a tuned temperature range. In this way optical path length changes due to a change of temperature can be reduced or eliminated providing a cable which is insensitive to temperature.

Abstract: A cable that extends along a longitudinal axis between a first end and a second end. The cable includes a jacket defined about the longitudinal axis. The jacket includes a plurality of fluting elements between the cable first end and the cable second end. The fluting elements are configured to reduce the torsional forces of cross-wind.

Abstract: A sensing cable for protection against rodent damage includes an optical component comprising at least one optical fiber, a plurality of armor components embedded in the jacket, and a strength member embedded in the cable jacket, wherein when viewed in cross-section, each component of the plurality of armor components and the strength member surround the optical component with a gap formed between each component of the plurality of armor components and the optical transmission component and the strength member.

Abstract: The present disclosure provides an optical fiber cable. The optical fiber cable includes a central strength member. The central strength member lies substantially along a longitudinal axis of the optical fiber cable. The optical fiber cable includes at least one buffer tube. The at least one buffer tube is stranded helically around the central strength member. Each of the at least one buffer tube encapsulates at least one optical fiber. The optical fiber cable includes a first layer. The first layer circumferentially surrounds a core of the optical fiber cable. The optical fiber cable includes a second layer. The second layer is formed of high density polyethylene. The optical fiber cable includes at least one set of water swellable yarn and a plurality of ripcords.

Abstract: Apparatus for measuring deformation of an elongate body defining an axis, the apparatus including: an optical fibre arranged relative to the body, the optical fibre including a first strain sensitive optical fibre portion coupled to the body and at least partially aligned at a first angle relative to the axis, and a second strain sensitive optical fibre portion coupled to the body and at least partially aligned at a second angle relative to the axis, the second angle being opposite to the first angle; a radiation source connected to an end of the optical fibre, the radiation source being for supplying electromagnetic radiation to the optical fibre; a sensor connected to an end of the optical fibre, the sensor being for sensing electromagnetic radiation received from the first and second optical fibre portions; and a processing device for determining the deformation of the body using the sensed electromagnetic radiation, the deformation including any axial or torsional deformation.

Abstract: A fiber optic cable includes a core, armor surrounding the core, and a jacket surrounding the armor. The core includes tubes, each tube having a passage defined therein, optical fibers positioned in the passages, and a binder sleeve defining an exterior of the core. Portions of the binder sleeve are directly bonded to the armor, while other portions are not. Spacing between the armor and the core, as well as the bond between the armor and binder sleeve, facilitate tubing-off of an end section of the cable to include removal of the binder sleeve.

Abstract: An optical cable can include one or more graphenic elements disposed about one or more optically transmissive fibers. A graphenic element can be a coating of graphene or amorphous graphite, a ribbon of graphene or amorphous graphite, or fibers of graphene or amorphous graphite. The graphenic element provides a path for electrical conduction while the optically transmissive fiber provides a path for optical transmission. An optical cable as disclosed herein can include a plurality of electrical and optical paths with a much smaller diameter and weight than traditional cables.

Abstract: A fiber-bundle sub-assembly includes an array of fiber bundles each having at least one optical fiber. The fiber bundles have select relative positions in the array. The sub-assembly includes first and second connecting elements that run along the array and that are secured to axially staggered top and bottom anchors to define first and second connecting spans that cross first and second sides of the array, with the first and second sides defined by first and second sets of fiber bundles. The first and second connecting spans are respectively attached to the first and second sets of fibers bundles to maintain the select relative positions of the fiber bundles even when the connecting spans are cut near one of the anchors during processing. A loose-tube cable that includes the fiber-bundle sub-assembly and a method of connectorizing the fiber bundles while maintaining their select positions are also disclosed.

Abstract: A method of terminating a cable includes: a) providing an overhead cable pathway structure that defines a cable-carrying region; b) mounting adapters to the overhead cable pathway structure outside of the cable-carrying region; c) routing a cable from the cable-carrying region of the overhead cable pathway structure to the adapter mounted to the cable pathway structure; and d) terminating the cable to the adapter.

Abstract: An optical-electric composite cable includes an optical fiber, an inner tubular cover enclosing the optical fiber, a plurality of electric wires arranged outside the inner tubular cover, a binding member collectively bundling the plurality of electric wires, and an outer tubular cover covering an outer periphery of the binding member. A gap exists between the binding member and the outer tubular cover.

Abstract: A cable including an outer metal tube and a first layer wire inside the outer metal tube, wherein the first layer wire has five inner elements surrounding a metallic center member and at least one of the inner elements is a metal tube containing an optical fiber.

Abstract: In various embodiments, a tubular comprises a tubular outer sheath defining an inner void; one or more core elements or assemblies disposed within the inner void; and a substantially solid filler in various embodiments disposed within and substantially filling the inner void, where the filler is adapted to give the tubular hoop strength in a crush situation and comprises a polymer with a density of at least 1.0. In some embodiments, these core assemblies comprise an extruded polymer layer typically extruded about core elements in a single pass, fitting about them without a sharp edge and defining an outer shape. The resulting tubular can comprise multiple regions which, though substantially filled, are filled with differing fillers densities.

Abstract: Disclosed is a low-shrink buffer tube having a reduced diameter. The buffer tube provides adequate crush resistance and is suitable for deployments requiring mid-span access.

Abstract: Disclosed is a low-shrink buffer tube having a reduced diameter. The buffer tube provides adequate crush resistance and is suitable for deployments requiring mid-span access.

Abstract: A microbundle optical cable such as, a riser cable, includes an outer jacket and a plurality of microbundles housed in the outer jacket. At least one of the microbundles includes an optical fiber ribbon enclosed in a microbundle coating. The at least one microbundle includes a longitudinal axis and a cross-section taken on a plane substantially perpendicular to the longitudinal axis. The cross-section may include a first dimension and a second dimension. The first dimension is higher than the second dimension. Therefore, the cross-section shape is an elongated cross shape.

Abstract: A communication cable can comprise twisted pairs of electrical conductors for transmitting electrical signals and bundles of optical fibers for transmitting optical signals. The electrical signals and/or the optical signals can support voice and digital communication or data transmission. The twisted pairs can be disposed along a central axis of the communication cable. Each bundle of optical fibers can be disposed in a respective buffer tube. The buffer tubes can be arranged in a ring around the twisted pairs. The communication cable can be configured to manage strain on the optical fibers without subjecting the twisted pairs to deleterious tensile stress. The communication cable can include an outer jacket sized for insertion in a conduit running along a railway or other transportation line.

Abstract: A cable includes a channel with an aspect ratio that houses optical fibers therein. The cable includes first and second stranded conductors on opposing sides of the channel. The channel is arranged with respect to the stranded conductors so that the fibers assume low strain positions in the channel when the cable is bent.

Abstract: A crush-resistant fiber optic cable is disclosed, wherein the cable includes a plurality of optical fibers. The fibers are generally arranged longitudinally about a central axis, with no strength member arranged along the central axis. A tensile-strength layer surrounds the plurality of optical fibers. A protective cover surrounds the tensile-strength layer and has an outside diameter DO in the range 3 mm?DO?5 mm.

Abstract: An optical fiber cable including, in a radial direction outward, a central strength member, a first layer of loose buffer tubes stranded around the central strength member, at least one of the loose buffer tubes of the first layer containing at least one light waveguide, an intermediate layer, a second layer of loose buffer tubes stranded around the intermediate layer, at least one of the loose buffer tubes of the second layer containing at least one light waveguide, and a jacket surrounding the second layer of loose buffer tubes, wherein the intermediate layer is formed of a material having a high coefficient of friction.

Abstract: A fiber optic cable includes a cable jacket and a core. The cable jacket is tubular, having exterior and interior surfaces, and is formed mostly from a first polymeric material. The jacket includes access features formed from a second polymeric material at least partially embedded in the first polymeric material and extending lengthwise along the jacket. Two of the access features are spaced apart from one another with a section of the jacket formed from the first polymeric material extending laterally therebetween, such that the section may be peeled apart from the rest of the cable lengthwise along the jacket by separation of the jacket about the access features. The core has an outermost surface and includes optical fibers and a strength member. The outermost surface of the core is at least partially bonded to the interior surface of the jacket, which enhances coupling between the jacket and core.

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.

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.

Abstract: The present invention relates to a bundled cable suitable for installation in multiple dwelling unit (MDU) applications. The bundled cable includes two or more binders stranded around multiple stranded cable units. The bundled cable not only maintains its integrity on a reel and during installation, but also reduces installation time.

Abstract: A multi-tube optical fiber cable has a core with a first set of one or more optical fiber tubes, each having one or more optical fibers loosely arranged therein. The first set of tubes is constructed of a polymer having a low Young's constant modulus. The core also includes at least two strength members with a first binder arranged around the first set of optical fiber tubes and the strength members, where the first binder is substantially flat in shape such that there is no deformation of the first set of tubes, and where the strength members are offset from a central axis of the cable. The cable maintains a second set of a plurality of optical fiber tubes, each having one or more optical fibers loosely arranged therein, arranged around the outer circumference of the core.

Abstract: An optical cable includes a buffer tube housing at least one optical fiber, a sheath surrounding such buffer tube and at least one longitudinal strength member embedded in the sheath, in which at least one separation element is provided between a portion of the outer surface of the buffer tube and the inner surface of the sheath, laying in an axial plane not containing the at least one strength member.

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 first end having cable pathway openings and a second end having connector elements 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 element mounted on the second end and the first connector element 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 connector element in the first position.

Abstract: Cables have armor including a polymer, the armor having an armor profile that resembles conventional metal armored cable. The 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.

Abstract: A micromodule cable having optical transmission elements arranged in a helically wound manner around a longitudinal axis by at least 360° in a longitudinal direction where the lay length is 100 times of the diameter of the optical cable. The cable is stable across a wide temperature range.

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.

Abstract: An optical unit is comprised of a plurality of optical base fibers twisted together without any member serving as a center of twisting so that each optical base fiber comes in contact with adjacent optical base fibers along the whole length, each of the optical base fibers including an optical fiber and a sleeve consisting essentially of silicone, a filler having the plurality of optical base fibers embedded therein, the filler consisting essentially of silicone, and a sheath covering the filler and the plurality of optical base fibers embedded in the filler.

Abstract: The present invention relates to optical-fiber modules having improved accessibility. In a typical embodiment, the optical-fiber module includes one or more optical fibers surrounded by an intermediate layer. The intermediate layer typically includes a polymeric medium with a liquid lubricant dispersed therein. A buffer tube encloses the optical fibers and the intermediate layer.

Abstract: An optical fiber cable for bundled drop applications has a plurality of optical fiber sub-units stranded together in an S-Z lay configuration and a jacket surrounding and holding the sub-units in the S-Z configuration without assistance from binder threads. The jacket contacts at least some of the sub-units and has one, but preferably at least two, longitudinally disposed grooves on an external surface. With at least two grooves, the sub-units are accessed by bending the cable until the jacket buckles between the grooves, cutting the jacket at the buckle, and peeling back a portion of the jacket longitudinally between the grooves.

Abstract: A fiber optic cable includes a strength member, a layer of polyethylene contacting the exterior of the strength member, and a yarn wound around the strength member. The yarn is between the strength member and the layer of polyethylene.

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.

Abstract: Electrical and/or optical connector housing (11) with a wet-mateable connector receiving part (17), adapted to receive a mating electrical and/or optical connector counterpart when surrounded by a hydrostatic pressure, such as the pressure of surrounding water. The connector housing (11) exhibits a compartment (19) that is pressure balanced with respect to said hydrostatic pressure, wherein one or more electrical and/or optical conductors (21) are guided from the receiving part (17) to a penetrator (15), said penetrator (15) constituting a pressure barrier between said compartment (19) and an opposite end of the penetrator (15). The housing (11) comprises at least one wall part (29) adapted to be flexed by an exterior hydrostatic pressure exerting force on the housing (11), thereby changing the volume of said inner compartment (19), whereby said wall part (29) constitutes at least a part of the encapsulation of said compartment (19).

Abstract: An assembly of fiber optic elements includes at least two subunits, each of which has at least one fiber optic unit and a flat binder wrapped over the subunits into an arrangement. The at least two subunits are stranded in a S-Z arrangement at a first lay length and the binder is stranded over the subunits in a uni-directional helical lay at a second lay length. The payoff tension and the first lay length of the subunits, combined with a payoff tension and the second lay length of the binder are simultaneously sufficient to hold the subunits within the arrangement, while being loose enough to allow a single subunit to be removed without destroying the arrangement.

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.

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.

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.

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.

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.

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.

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.

Abstract: Fiber optic cable furcation methods and assemblies are disclosed, wherein the method includes removing an end portion of the cable outer jacket from the fiber optic cable to expose end portions of the micromodules contained within. The method also includes helically stranding the exposed micromodule end portions to form a stranded section having a stranded configuration that includes at least three turns and that substantially immobilizes the optical fibers within their respective micromodules. The method also includes arranging a maintaining member on at least a portion of the stranded section to maintain the stranded configuration.

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.

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.

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.

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.

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.

Abstract: A method for installing a fiber optic cable assembly includes providing a fiber optic cable assembly. The fiber optic cable assembly includes a first jacket, a strength layer, and a second jacket. The strength layer surrounds the first jacket and includes a first set of strength members helically wrapped around the first jacket and a second set of strength members reverse helically wrapped around the first jacket. The first and second sets of strength members are unbraided. The method further includes routing the fiber optic cable assembly from a fiber optic enclosure to an end location. A portion of the second jacket at an end of the fiber optic cable assembly is split. The portion of the second jacket is removed.