Abstract: An optical phase modulator made of lithium niobate or the like phase-modulates the output light of a single-wavelength laser light source 20 that emits CW light, and the phase-modulated light is inputted to a dispersion medium 22. The positive chirp and negative chirp of light to which frequency chirp is applied by phase modulation draw near in the dispersion medium and an optical pulse is generated.

Abstract: An optical fiber cable that sustains reduced increase in transmission loss and optical fiber breakage when subject to external pressure exerted thereon, comprises an aggregate of elements including central buffer filaments disposed in the center part of the optical fiber cable and a plurality of optical fibers disposed around the central buffer filaments, as well as circumferential strength filaments disposed around the outer periphery of the aggregate of elements, and a sheath covering the circumferential strength filaments.

Abstract: A telecommunications cable includes a distribution cable, a tether branching from the distribution cable at the mid-span breakout location, an enclosure that surrounds the breakout location, and an access device including a ripcord installed on the enclosure. Typically, the first and second ends of the ripcord are arranged adjacent the first end of the enclosure and a middle of the ripcord forms a half-loop adjacent the second end of the enclosure. The ripcord is configured to cut through the body of the enclosure when pulled from at least one of the first and second ends.

Abstract: A plurality of fiberoptic strands is provided. Each fiberoptic strand has a free end. A plurality of groups is provided. Each group is formed of a plurality fiberoptic strands. A plurality of beads is provided. Each bead has a generally cylindrical configuration. Each bead has an exterior diameter, an interior diameter and an axial length. The beads have exterior surfaces. The exterior surfaces are of different colors. In this manner intended functions are designated.

Abstract: A securement system includes at least one retention arrangement securing a tether to a distribution cable; and a release device secured to the distribution cable. The release device extends along at least a portion of the length of tether. Pulling the release device away from the distribution cable disengages the retention arrangement to free the tether from the distribution cable. Multiple retention arrangements can be used to secure the tether.

Abstract: A method for producing an optical fiber cable which improves stability by attaching an Aramid yarn near the core in parallel to an axial direction of the optical cable and solves structural problems of the cable by soaking an Aramid yarn into an epoxy resin is disclosed. This optical cable producing method uses a tensile material for improvement of tensile property, and includes the steps of soaking the tensile material into an epoxy resin, and attaching the tensile material to the optical cable in parallel to the axial direction of the optical cable.

Abstract: A fiber optic cable and methods of manufacturing the same includes at least one optical fiber, and at least one ferrule. The at least one ferrule is attached to the at least one optical fiber before the cable jacket is applied. The cable jacket surrounds the at least one optical fiber and the at least one ferrule so that when the cable jacket is opened the at least one optical fiber having the at least one ferrule attached may be accessed. Consequently, the when opening the cable, the craft is presented with an optical fiber that is preterminated with a ferrule. Optionally, the ferrule can have a cover or be a portion of a fiber optic connector. The cable is manufactured so that one or more of the ferrules are appropriately placed along the length of the fiber optic cable for distribution into the fiber optic network.

Abstract: Fiber optic cables and assemblies useful for distribution of the optical fibers to a network are disclosed. The fiber optic cables include a first strength component and a second strength component with a cable jacket generally surrounding the first and second strength components. One or more compartments are defined between the first and second strength components for housing one or more optical fibers. The optical fibers of the fiber optic cable are easily accessible by the craft for distribution to the network, thereby allowing the construction of assemblies that are suitable for distribution of the optical fibers to the network.

Abstract: An optical device for changing polarization comprises a waveguide having a waveguide end facet coupled to a quarter-wave plate/reflector combination to rotate the polarization of incident light to the waveguide by 90 degrees. In one embodiment, a polarization beam splitter/rotator combination (PBSR) uses a quarter-wave plate in reflection at the end facet of the waveguide. The polarization beam splitter/rotator combination and variations of that structure are applied in various useful topologies as polarization mode dispersion (PMD) compensators and polarimeters.

Abstract: A telecommunication optical cable has a number of optical fibers; at least a microsheath loosely containing the optical fibers, the at least one microsheath loosely containing the optical fibers therein forming at least one corresponding microbundle, wherein the optical fibers are stranded according to an open helix trajectory.

Abstract: An optical fiber having improved compression strength is disclosed. The optical fiber includes a central tension member positioned in the center of the optical fiber and having at least one groove, at least one metal tube seated in the groove and containing at least one optical fiber, a strength member positioned around the central tension member and the tube, and a sheath positioned around the strength member.

Abstract: Optical fiber cables with a central strength member encircled by a jacket having ducts which are disposed around the strength member and which receive one or more optical fibers with jacket material between the ducts and the outer surface of the jacket. The optical fibers are free to move in the ducts, and preferably, the optical fibers are tight buffered. Portions of the jacket intermediate the ducts connect to the strength member which resists longitudinal movement of the jacket relative to the core. However, the jacket can be separated from the core by manual pulling force after the jacket is axially and radially cut at a pair of diametrically opposite ducts. Preferably, the jacket has outer surface indicia showing the positions of the slots, and the cables can include water blocking materials.

Abstract: A water blocking configuration for a low temperature, dry loose tube fiber optic cable includes one or more flexible buffer tubes each having a passage sized to contain one or more optical fibers. A single yarn is disposed in the passage of each buffer tube, and the yarn has a denier of not more than 1500. The yarn is coated with particles of a water absorbent material having a size distribution of between zero and not more than 160 microns. A dry loose tube fiber optic cable having the disclosed configuration meets the Telcordia GR 20 (Issue 2) industry standard with respect to water penetration, change of fiber attenuation, and fiber tensile strength at a low temperature of ?60 degrees C.

Abstract: A flexible innerduct structure is configured to contain a cable within a conduit. The innerduct structure includes a pair of adjacent strip-shaped layers of flexible material that are joined along their longitudinal edges to define a channel through which the cable can extend longitudinally through the innerduct structure between the layers. The adjacent layers have differing widths between their longitudinal edges, whereby the wider layer bulges away from the narrower layer to impart an open configuration to the channel. Other features of the innerduct structure relate to the material of which it is formed. Such features includes the structure of the material, such as a woven structure, and further include properties such as melting point, tensile strength, elongation, coefficient of friction, crimp resistance and compression recovery.

Abstract: A flexible fire resistant innerduct structure is configured to contain a cable within a conduit. The innerduct structure includes a pair of adjacent strip-shaped layers of flexible material that are joined along their longitudinal edges to define a channel through which the cable can extend longitudinally through the innerduct structure between the layers. The adjacent layers have differing widths between their longitudinal edges, whereby the wider layer bulges away from the narrower layer to impart an open configuration to the channel. Other features of the innerduct structure relate to the material of which it is formed. Such features includes the structure of the material, such as a woven structure, and further include properties such as melting point, tensile strength, fire resistance, elongation, coefficient of friction, crimp resistance and compression recovery.

Abstract: A telecommunication cable of the microcable or minicable type having optical fibers (2) contained in a thin retaining sheath (3) includes an external layer (4) extending concentrically around the retaining sheath. The external layer has a friction coefficient lower than that of the retaining sheath and a stiffness greater than that of the retaining sheath. These characteristics reduce friction and increase the stiffness of the cable when the latter is installed by blowing or floating in a conduit.

Abstract: The present invention is an easy access tape with peelable sections to allow easy access to the internal components of the cable or tube. The tape of the present invention contains at least one removable, peelable section which can be easily positioned within the cable and can be removed easily. The removable section of the tape is separated from the remainder of the tape by a number of different methods, including the use of perforation and channels. Additionally, the removable section of the tape can have a different thickness than the remainder of the tape, can be made of different materials, or have different physical properties.

Abstract: An optical fiber cable allows for future expansion with blown optical fibers through conduits. The cable assembly includes a central strength member, a conduit, and a buffer tube of optical fibers, all surrounded by an outer jacket. The central strength member may be tubular. While the buffer tube of optical fibers accommodates current capacity requirements, the conduit and possibly the tubular strength member provide paths for blowing additional optical fibers into the cable to meet future capacity needs.

Abstract: A display controller for controlling display on a display surface of a display unit mounted on a vehicle. The display unit is rotatably mounted on the vehicle. A CPU of a controller recognizing that the vehicle is traveling, that a display surface of a display unit is oriented toward the driver's seat, and that a moving picture is displayed on the display surface, inhibits display of the moving picture on the display unit. The CPU of the controller, recognizing that the vehicle is traveling, that the display surface of the display unit is oriented toward the driver's seat, and that a moving picture is displayed on the display surface rotates the display unit to a position where an occupant of the driver's seat cannot watch the moving picture.

Abstract: An optical fiber cable includes a number of optical fiber bundles. Each bundle contains a number of optical fiber cable units, and a relatively thin skin surrounds the cable units and retains the units in a desired configuration another over the length of the bundle. Each cable unit includes a number of optical fibers, and a first outer jacket that surrounds the fibers. The bundles are protectively enclosed by a second outer jacket of the cable. In an illustrated embodiment, each cable unit has 12 fibers, each bundle contains 12 cable units, and six bundles are protectively enclosed by the second outer jacket, so that the cable contains 432 optical fibers each of which is traceable by color and/or indicia markings.

Abstract: An optical fiber cable including a slotted core (3) having a suitable number of slots (7) and identification members (25) disposed in a designated slot (7B) of the slots (7) for identifying cable information.

Abstract: In applying an intermediate coating layer of thermoplastic resin onto the periphery of a central tensile member and applying a main coating of polyethylene resin, having continuous spiral grooves that are for accommodating optical fibers and are inverted periodically in direction along the length direction, onto the outer periphery of the abovementioned intermediate coating layer, a cooling medium is blown or made to flow with priority onto the grooves after melt discharge to form a spacer with which even though the minimum rib thickness of the ribs that define the abovementioned spiral grooves is 1.0 mm or less, the groove inclination angle ? of the spacer cross section at the inversion parts is 18° or less.

Abstract: A cable, and process for manufacture thereof, containing optical transmission elements. The cable having the following characteristics: a central element stretching in the direction of the cable longitudinal axis, where the central element has at least one slot open to the outside and where the slot runs on the outside of the central element in a helix or screw-like manner, with periodically changing rotation direction; several optical fiber ribbons arranged inside the slot in a stack, situated one above the other, where an additional equal lay stranding is applied to the SZ-stranding imposed by the slot path; and a single or multi-layer jacket surrounds the central element.

Abstract: A flexible fire resistant innerduct structure is configured to contain a cable within a conduit. The innerduct structure includes a pair of adjacent strip-shaped layers of flexible material that are joined along their longitudinal edges to define a channel through which the cable can extend longitudinally through the innerduct structure between the layers. The adjacent layers have differing widths between their longitudinal edges, whereby the wider layer bulges away from the narrower layer to impart an open configuration to the channel. Other features of the innerduct structure relate to the material of which it is formed. Such features includes the structure of the material, such as a woven structure, and further include properties such as melting point, tensile strength, fire resistance, elongation, coefficient of friction, crimp resistance and compression recovery.

Abstract: A tape optical fiber cord with an optical fiber array has, at its one end, a half pitch fiber array connected to an optical waveguide. Connectors are connected respectively to connector-side optical fibers located at the other end of the tape optical fiber cord. A branching case for branching the connector-side optical fibers is provided in a position between both ends of the cord. One end of a tape fiber comprising tapes arranged in two columns of two stages is fixed to the half pitch fiber array, and the other end is fixed in a fixation section within the branching case to the case. In the portion intermediate between the two fixed portions, the connector-side optical fibers are separated one by one, and the outside of the separated optical fibers is covered with a protective tube while leaving a space between the protective tube and the separated optical fibers.

Abstract: An optical fiber cable including an axial portion and a plurality of portioning plate portions housed in a space encircled by a sheath; and the axial portion and the portioning plate having a sectional shape that the partitioning plate portions radially extend toward an inner circumferential surface of the sheath from the axial portion; wherein the space is divided into a plurality of partitioned slots by the partitioning plate portions having leading ends provided with enlarged portions in contact with the inner circumferential surface of the sheath and connecting portions connecting the enlarged portions to the axial portion, and optical fibers are distributed so that two or more optical fibers are not provided in a single partitioned slot.

Abstract: A polyethylene spacer for optical fiber cable including a central tensile member, an intermediate coating layer arranged on an outer periphery of the central tensile member and being compatible with polyethylene and a main coating arranged on an outer periphery of the intermediate coating layer and having continuous spiral grooves for accommodating optical fibers and which are inverted periodically in a lengthwise direction. The main coating is formed from polyethylene resin. The spacer includes ribs defining the spiral grooves. A minimum thickness of the ribs is 1.0 mm or less, the groove inclination angle &agr; of a cross section of the spacer at inversion part is 18° or less. A resin density of a root part of each rib is the lowest in comparison to a resin density at a tip part of the rib and central parts of the rib between the root part and the tip part.

Abstract: The present invention's optical cable is provided with optical fibers, a forming pipe for housing the optical fibers, a sheath provided around the forming pipe, and at least one pair of rip cords embedded in the sheath. The forming pipe is formed of a plurality of tapes so that it is dividable along its longitudinal direction. When dividing the optical cable, the rip cords are pulled to tear open the sheath, and the already split forming pipe is divided while staying adhered to the respective parts of the sheath. As a result, the division of the sheath and the forming pipe is carried out in one stroke, so that the optical fibers inside the forming pipe can be exposed easily and quickly.

Abstract: A fiber optic cable having at least one optical fiber component disposed within at least one retention area of a support member. The support member includes metallic or dielectric materials having the retention area generally longitudinally formed therein relative to an axis of the cable. The cable can include a cable jacket substantially surrounding the support member. Additionally, the cable can include a cushioning zone adjacent the optical fiber component, a water-blocking component and/or an interfacial layer at least partially disposed between an outer surface of the support member and the cable jacket. The support member can have at least one bendable tab for at least partially covering the retention area.

Abstract: An optical fiber holding structure is used to restrain high fiber count fibers or to provide splice protection in a cable joint. Layers of fibers are inserted between a compliant splint member and a semi-rigid splint member, which are positioned within an outer gripping tube such as a heat shrink tube. Optionally, an internal support can be positioned between the layers of fibers. The assembly is heated causing the heat shrink tube to apply a gripping force to the splint members and fibers supported therebetween. Where more than two layers of fibers are being restrained, internal supports can be positioned between each of the fiber layers. One type of internal support includes a rigid beam coated with a compliant material.

Abstract: A flexible fire resistant innerduct structure is configured to contain a cable within a conduit. The innerduct structure includes a pair of adjacent strip-shaped layers of flexible material that are joined along their longitudinal edges to define a channel through which the cable can extend longitudinally through the innerduct structure between the layers. The adjacent layers have differing widths between their longitudinal edges, whereby the wider layer bulges away from the narrower layer to impart an open configuration to the channel. Other features of the innerduct structure relate to the material of which it is formed. Such features includes the structure of the material, such as a woven structure, and further include properties such as melting point, tensile strength, fire resistance, elongation, coefficient of friction, crimp resistance and compression recovery.

Abstract: A fiber optic cable having at least one optical fiber component disposed within at least one retention area of a support member. The support member including a metallic or dielectric material having the retention area disposed generally helically relative to a longitudinal axis of the cable. The cable also includes an interfacial layer between an outer surface of the support member and a cable jacket substantially surrounding the support member. The cable can include a cushioning zone adjacent the optical fiber component, and/or a water-blocking component between an outer surface of the support member and the cable jacket. The support member can have at least one bendable tab for at least partially covering the retention area.

Abstract: A fiber optic cable having at least one optical fiber component disposed within at least one retention area of a support member. The support member includes metallic or dielectric materials having the retention area generally longitudinally formed therein relative to an axis of the cable. The cable can include a cable jacket substantially surrounding the support member. Additionally, the cable can include a cushioning zone adjacent the optical fiber component, a water-blocking component and/or an interfacial layer at least partially disposed between an outer surface of the support member and the cable jacket. The support member can have at least one bendable tab for at least partially covering the retention area.

Abstract: The present invention is directed to a novel construction of buffer tubes for fiber optic cables which offers a way to access the optical fibers inside a buffer tube while reducing the risk of damaging the fibers, as sometimes occurs when cutting the outer layer of the buffer tube. A buffer tube for use in a fiber optic cable of the present invention comprises a tube having a tube wall, the wall having an inside and outside surface, wherein an inner portion of tube wall, nearest the inside surface, is made of a material having a higher notch-sensitivity than an outer portion of the tube wall nearest the outside surface.

Abstract: A gas pipe explorer formed of a plurality of connecting elements, and an articulation element between the connected elements. The connected elements include drive capabilities, and the articulation element allows the connected elements to traverse gas pipes of arbitrary shapes and sizes. A sensor may sends the characteristics of the gas pipe, and the communication element may send back those sends characteristics. The communication can be wired, over a tether connecting the device to a remote end. Alternatively, the connection can be wireless, driven by either a generator or a battery.

Abstract: A flexible innerduct structure is configured to contain a cable within a conduit. The innerduct structure includes a pair of adjacent strip-shaped layers of flexible material that are joined along their longitudinal edges to define a channel through which the cable can extend longitudinally through the innerduct structure between the layers. The adjacent layers have differing widths between their longitudinal edges, whereby the wider layer bulges away from the narrower layer to impart an open configuration to the channel. Other features of the innerduct structure relate to the material of which it is formed. Such features includes the structure of the material, such as a woven structure, and further include properties such as melting point, tensile strength, elongation, coefficient of friction, crimp resistance and compression recovery.

Abstract: The present invention relates to a cable, particularly for monitoring and/or controlling oil/gas wells, comprising a protective tube (6; 16) of metal, reinforced synthetic material or the like, said protective tube surrounding at least one fiber tube (3; 13), said fiber tube containing at least one optical fiber (4; 14), wherein the cable comprises organs for venting the cable.

Abstract: A fiber optic cable having at least one optical fiber component disposed within at least one retention area of a support member. The support member including a metallic or dielectric material having the retention area disposed generally helically relative to a longitudinal axis of the cable. The cable also includes an interfacial layer between an outer surface of the support member and a cable jacket substantially surrounding the support member. The cable can include a cushioning zone adjacent the optical fiber component, and/or a water-blocking component between an outer surface of the support member and the cable jacket. The support member can have at least one bendable tab for at least partially covering the retention area.

Abstract: A fiber optic interconnect cable having at least one optical fiber ribbon surrounded by a cable jacket with substantial hoop strength, the cable jacket having a top wall, a bottom wall, and sidewalls. The sidewalls being thicker than the top and bottom walls. The jacket being formed of a material having a hardness for cable performance characteristics, the hardness being between a Shore A hardness of about 85 and a Shore D hardness of about 70. Other embodiments include a core formed as a generally rod-shaped structure with a plurality of slots formed in an outer surface thereof. The plurality of slots extending generally lengthwise along the core and an outer jacket surrounding the core. At least one interconnect ribbon cable is disposed in at least one of the slots.

Abstract: A fiber optic cable (10) having a tube assembly (20) therein. Tube assembly (20) includes an optical fiber group (22) in a tube (21). Optical fiber group (22) comprises a medial optical fiber subgroup (23) and lateral optical fiber subgroups (24a, 24b;25a,25b;26a,26b) adjacent thereto. Subgroups (24a,24b;25a,25b;26a,26b) define a step-like profile for maximizing optical fiber packing density of tube assembly (20) and/or defining a high fiber count cable (10). In exemplary embodiments, a diagonal free space is defined as the tube inner diameter minus the diagonal length of the cross-section of the profile of the optical fiber ribbon stack, the diagonal free space being about 2 mm to about 5 mm. In a multi-tube embodiment, diagonal free space can be about 0.5 mm to about 2 mm. In other embodiments, corner fibers can have a delta optical attenuation of less than about 0.05 dB/Km for a wavelength of @1550 nm over a 100 meter length 40″ to 70″ drum at room temperature.

Abstract: An optical fiber cable comprising a plurality of buffer tubes, binder wrapped around the buffer tubes, a ripcord disposed between the buffer tubes and the binder, and a protective outer jacket covering the buffer tubes. Upon application of a sufficient outwardly directed pulling force, the ripcord rips both the binder and the jacket thereby providing access the buffer tubes and optical fibers therein. The binder is formed of a material which melts or softens when the jacket is formed by an extrusion process so that the binder is thereby incorporated into the jacket. Alternatively, the binder is formed of a material which will adhere to the jacket when the jacket is formed by an extrusion process and is easily torn when the jacket is ripped by the ripcord.

Abstract: To provide an optical fiber cable having a plurality of GI-POFs and a resin cable body confining these, and excellent in the thermal durability, pressure resisting property and flexural mechanical property, wherein the increase of the attenuation of the light is suppressed. The resin cable body has as many holes as the number of the GI-POFs, extending longitudinally therethrough, and the GI-POFs are distributed and arranged one by one in the holes so that they are freely movable in two directions perpendicular to the longitudinal direction.

Abstract: A central tube cable, including a cable jacket defining an optical fiber cavity therein; at least one radial strength member embedded in the jacket; a plurality of optical fibers disposed within the optical fiber cavity; and a bundle support member disposed inside the optical fiber cavity to limit movement of the optical fibers with respect to the bundle support member. The optical fibers are preferably housed in buffer tubes and at least some of the buffer tubes contact the bundle support member. The buffer tubes are either helically stranded around the bundle support member or are S-Z stranded. The optical fibers may be provided in the form of optical fiber ribbons that are located in the optical fiber cavity.

Abstract: The present invention relates to a cable, in particular an optical fiber cable, which is resistant to the radial permeation and to the longitudinal propagation of water. This cable contains a water-soluble polymer material which is a water-swellable and water-soluble material. In particular, this cable is characterized in that, following the ingress of water into this cable, the propagation of water is impeded on account of the combined effect of the swelling of the water-soluble material and the formation of an aqueous solution of said material which has a predetermined viscosity, so as to impede the passage of the residual water. Preferably, the water-soluble material is chosen from polyacrylamide, modified polyvinyl alcohol, vinyl alcohol/vinyl acetate copolymers, polyvinylpyrrolidone, and mixtures thereof, the material preferably being a vinyl alcohol/vinyl acetate copolymer.

Abstract: A conduit sleeve structure for use with fiber optic cables, coaxial cables and the like includes a pair of adjacent strip-shaped layers of flexible material that are joined along their longitudinal edges to define a channel through which the cable can extend longitudinally through the innerduct structure between the layers. The adjacent layers have differing widths between their longitudinal edges, whereby the wider layer bulges away from the narrower layer to impart an open configuration to the channel. It has been found that the conduit sleeve structure may be manufactured more efficiently and inexpensively if multiple sheets and pull cords are stacked and arranged in such a way that multiple conduit sleeve structures may be manufactured simultaneously in a parallel arrangement. The method of manufacturing the conduit sleeve structures includes feeding several stacked sheets through a folding machine or mechanism, a stitching machine, and then a slitting machine.

Abstract: An essential component of the SZ-stranded slotted core cable is the cylindrical central element (ZE), on whose jacket run several slots open to the outside, located next to each other in the form of a spiral with periodically changing rotation direction. Due to their bending characteristics, the optical fiber ribbons (LB) arranged in a stack (BS) one above the other in the slot (K) take up a preferred orientation, so that the cable shows two distinct main axes with different bending behavior.

Abstract: Cables and an apparatus and methods for making cables having at least one messenger section, transmission sections, and at least two series of connecting webs. At least one series of webs can be intermittently formed. The messenger sectioncan include a messenger wire for supporting the cable, and the transmission sections can include electrical/electronic and/or optical transmission components.

Abstract: A fiber optic cable having skewed partitions is provided. Specifically, the fiber optic cable has a jacket, having an interior surface and exterior surface. A core element is centrally located within the jacket. Partitions extend from the core element to the interior surface in a skewed manner, thereby creating buffer cells within the fiber optic cable. A plurality of fiber ribbons and/or optic fibers may be housed within the buffer cells. The buffer cells ability to rotate and move the fibers sideways under crushing loads help protect the optic fibers and fiber ribbons from being crushed. Furthermore, the buffer cells provide a unique and optimal packaging configuration for high-fiber density cables.

Abstract: An optical fiber cable having improved compatibility with a waterblocking filling composition is provided. In particular, the optical fiber cable has a cable component, wherein an optical fiber can be housed, such as a buffer tube or a slotted core, made of a polyolefinic material having high compatibility with a waterblocking filler disposed therein. The cable component is manufactured by employing a suitable polyolefinic material, polyethylene in particular, having a density in the finished component of at least 0.940 g/ml, preferably of about 0.942 g/ml or higher, up to about, e.g., 0.975. The material preferably has a melt flow index (MFI) at 190° C. and 2.16 kg lower than about 3 and a shear sensitivity of the same, a shear sensitivity higher than about 40.

Abstract: The present invention aims at providing an optical waveguide filter for reliably selecting light of desired wavelength using polarization mode conversion, to realize a sufficient extinction ratio.