Abstract: A method of installing a bundle of optical fibers associated with a fiber network through hallways or corridors in a multi-dwelling unit (MDU) to service a number of premises in the MDU. The bundle is adhered along a wall or other supporting surface in a hall or corridor leading to the premises, by dispensing or activating an adhesive material or component over one or both of the bundle and a desired installation path along the supporting surface, and applying the bundle to the supporting surface over the installation path. A cover layer surrounding the fiber bundle is opened at locations along the length of the bundle corresponding to each premises for which a bundle fiber is designated. At each location, the designated fiber is cut and removed from the bundle, and retained to connect to a drop fiber originating from the premises. Installation tools are also disclosed.

Abstract: A module for storing optical fiber at user premises. A fiber supply spool has at least one winding section for storing a length of fiber to be routed at the premises. A spool plate has a base with retaining fingers for mounting the supply spool for rotation, and a hinge pin supported between the ends of two arms extending from the base. An elongated adapter plate is arranged for fastening over an opening cut in a drywall at the premises. The adapter plate includes at least one hinge mount for seating the hinge pin on the spool plate for swiveling movement. The spool plate can swivel on the adapter plate together with the mounted spool between a position where fiber is unwound from the spool for routing at the premises, and a position where the spool with remaining fiber is passed through the opening to be stored behind the drywall.

Abstract: An extensible adhesive dispensing gun system. A syringe has a piston for urging an adhesive out of a nozzle, and a first mount at a back end of the syringe. A gun body contains a mechanism for advancing a plunger from a front end of the body in response to a trigger, and a second mount is disposed on the front end. An extension tube assembly includes an outer tube having near and far end adapters. A third mount on the near end adapter engages the second mount on the gun body, and a fourth mount on the far end adapter engages the first mount on the syringe. An inner rod member is arranged inside the outer tube. When the gun plunger is urged against a back end of the rod member, a leading end of the member forces the syringe piston to urge the adhesive out of the nozzle.

Abstract: A tool device for installing an optical fiber inside a user premises includes a neck, a coupling joined to the neck for attachment to a leading end of an adhesive syringe or an extension pole, and a head joined to a leading portion of the neck. The head has a leading edge of a certain width, and a passageway for receiving an optical fiber and guiding the fiber to a position proximate to the leading edge. The width of the leading edge is such that when the edge is held transversely across a structural corner containing an adhesive bead, and an optical fiber is received in the passageway in the head and directed ahead of the leading edge, the edge embeds the fiber in the bead when the edge is swept along the corner with the optical fiber positioned between the edge and the adhesive bead.

Abstract: A fiber storage module having a removable supply spool is mounted inside a user premises. The module is arranged to retain the spool at either a first position where the spool can freely rotate, or a second position where the spool is locked. While the spool is removed from the module, a length of fiber sufficient to route from an entry point to the premises to the mounted module, and from the module to an optical device inside the premises, is wound on the spool. The spool with the wound fiber is retained at the first position inside the module, and the fiber is unwound and adhered or fastened to a supporting surface along a determined routing path at the premises. The spool is then locked at the second position, and a length of the remaining fiber is removed for connection to the optical device.

Abstract: An optical fiber storage module has a base, and a wall having an opening for paying out an optical fiber from inside the module. Spool retention fingers extend from the base. One or more fingers have a first rim at a first height above the base, and one or more fingers have a second rim at a second height above the base. A fiber supply spool has a hub, and an annular support disk inside the hub which forms a third rim. The spool is movable on the retention fingers between a first position where the third rim of the support disk is captured between the first and the second rims on the retention fingers, thus allowing the spool to turn when fiber is unwound, and (b) a second position where the spool engages one or more bosses formed on the module base to lock the spool from further rotation.

Abstract: A specialized, dispersion-controlled fiber is particularly configured to exhibit a relatively uniform dispersion (D) over a broad spectral range (for example, 1000 nm to 2000 nm). The specialized fiber exhibits an essentially constant attenuation (?) over this same spectral range so that the fiber is defined as having a high “figure of merit” (FoM) where FoM is defined as |D|/?. The specialized fiber is well-suited for use as a pulse stretcher, providing the ability to separate out wavelength constituents of an extremely short (fs, ps) broadband pulse into the ns range, for example.

Abstract: Disclosed herein is a cable sensor comprising an optical fiber; where the optical fiber comprises an optical core upon which is disposed a cladding; and a primary coating; a deformable material surrounding the optical fiber; and an outer tube surrounding the deformable material; where the optical fiber is longer than the outer tube by an amount of 0.1 to 2%. Disclosed herein too is a method for producing a cable sensor comprising mounting an optical fiber on a spool; where the optical fiber comprises a core; a cladding and a primary coating; charging the optical fiber from the spool to an extruder; extruding an outer tube onto the optical fiber such that a region between the optical fiber and the outer tube comprises a deformable material; elongating the optical fiber and the outer tube together to a desired amount; and relaxing the optical fiber and the outer tube; where the optical fiber retains a larger portion of the elongation than the outer tube.

Abstract: An up-taper is applied by a mode adapter to increase a signal mode area prior to tapering and combining.

Abstract: A optical fiber cable includes two or more non-twisted, rollable optical fiber ribbons within a central tube. The non-twisted, rollable optical fiber ribbons define a fiber packing density within the central tube of between 6.5 and 8.5 fibers per square millimeter.

Abstract: A optical fiber cable includes optical fibers, reinforcing yarns, and a jacket. Each optical fiber has a fiber strain greater than 0.6 percent under standard installation tensile load. The jacket encloses the optical fibers and reinforcing yarns at a packing density greater than about 1.25 fibers per square millimeter. The combined effect of optical fibers having a fiber strain greater than 0.6 percent under standard installation tensile load and a small amount of reinforcing yarn provides the optical fiber cable with high proof strain, compact diameter, and high packing density.

Abstract: Embodiments are directed to a single mode optical fiber. The optical fiber comprises, from the center to the periphery: a central core having a first refractive index, a pedestal region having a second refractive index, a trench region having a third refractive index, and a cladding region having a fourth refractive index. The third refractive index is less than the second refractive index.

Abstract: Embodiments are directed to a method and device for coupling an optical fiber sensing element to an apparatus under test. A channel is affixed to the apparatus under test. The channel is partially filled with a coupling material. The fiber optic sensing element is placed on the coupling material. Coupling material is placed in the channel to uniformly surround the fiber optic sensing element and tightly couple the fiber optic sensing element to the apparatus under test.

Abstract: Embodiments of the invention include an optical fiber cable. The optical fiber cable includes a plurality of multi-fiber unit tubes. The multi-fiber unit tubes are substantially circular and dimensioned to receive a plurality of optical fibers. The optical fiber cable also includes a plurality of partially bonded optical fiber ribbons positioned within at least one of the multi-fiber tubes. The partially bonded optical fiber ribbons are partially bonded in such a way that each partially bonded optical fiber ribbon is formed in a random shape. The partially bonded optical fiber ribbons also are partially bonded in such a way that the plurality of partially bonded optical fiber ribbons are randomly positioned within the multi-fiber unit tube. The optical fiber cable also includes a jacket surrounding the plurality of multi-fiber unit tubes.

Abstract: A telecommunication cabinet for managing connections between incoming and outgoing cables at building premises. The cabinet has a back wall, and bottom, top, left, and right walls. The bottom wall has a first incoming cable port that opens at a front edge of the bottom wall, the top wall has a second incoming cable port that opens at a front edge of the top wall, and the second incoming cable port is aligned vertically with the first incoming cable port. At least one of the right and the left walls has an outgoing cable port. Layers of incoming cables can enter the cabinet for connection, or pass through the cabinet to enter a second cabinet, by inserting the layers from the front of the cabinet into one or both of the incoming cable ports. Cable clamp assemblies fix the cables of each layer at corresponding positions inside the ports.

Abstract: Disclosed herein is a composition for coating an optical fiber comprising a free radically curable acrylate and/or a methacrylate functionalized oligomer having a density of less than 1.0 g/cm3; where the acrylate and/or the methacrylate functionalized oligomer has a functionality of 1 or more; a photoinitiator, and optionally a free radically curable acrylate and/or methacrylate diluent monomer that has a density of less than 1.0 g/cm3; where the coating composition is disposed and cured on an optical fiber, where the density of the cured coating is less than 1.0 g/cm3; and where the average functionality of the composition is greater than one.

Abstract: A distributed sensing optical fiber cable is proposed. An optical fiber is positioned at the center of the cable and includes a core region, at least one cladding layer surrounding the core region, a protective coating covering the at least one cladding layer, and a tight buffer of elastomeric thermoplastic material disposed to surround the protective coating. The remainder of the cable structure includes a pair of strength members disposed longitudinally on either side of the optical fiber (the strength members formed of a glass-based, memory-less material) and a hard plastic jacket formed to encase the optical fiber and the pair of strength members, the plastic jacket preferably exhibiting an essentially rectangular profile.

Abstract: An all-glass cladding mode stripper comprises a plurality of high refractive index, small diameter glass beads disposed along an exposed portion of the inner cladding region of an optical fiber. The unwanted low NA signal light (as well as any other type of stray light) propagating within the cladding layer is removed by refracting into the adjacent beads, where this captured light then scatters away from the optical fiber.

Abstract: An optical fiber has a core region that is doped with one or more viscosity-reducing dopants in respective amounts that are configured, such that, in a Raman spectrum with a frequency shift of approximately 600 cm?1, the fiber has a nanoscale structure having an integrated D2 line defect intensity of less than 0.025. Alternatively, the core region is doped with one or more viscosity-reducing dopants in respective amounts that are configured such that the fiber has a residual axial compressive stress with a stress magnitude of more than 20 MPa and a stress radial extent between 2 and 7 times the core radius. According to another aspect of the invention a majority of the optical propagation through the fiber is supported by an identified group of fiber regions comprising the core region and one or more adjacent cladding regions.

Abstract: Disclosed herein is a method for measuring temperature via distributed temperature sensing comprising transmitting light through a fiber optic cable; detecting backscattered light in the fiber optic cable, wherein the backscattered light comprises an anti-Stokes band and a Stokes band; calculating a ratio between an intensity of the anti-Stokes band and an intensity of the Stokes band; and using the calculated ratio to determine a temperature being sensed in the fiber optic cable; wherein the fiber optic cable comprises, from the center to the periphery; a central core having a refractive index that decreases progressively from a center of the central core to an edge of the core, wherein the refractive index follows an alpha profile; wherein a bandwidth-length product of the multimode optical fiber has a value greater than 2000 MHz-km at 1550 nm.