A power and optical fiber interface system includes a housing having an interior. A cable inlet is configured to receive a hybrid cable having an electrical conductor and an optical fiber. An insulation displacement connector (IDC) is situated in the interior of the housing configured to electrically terminate the conductor, and a cable outlet is configured to receive an output cable that is connectable to the IDC and configured to output signals received via the optical fiber.

An optical fiber unit includes a plurality of optical fibers, a fibrous filler disposed along the plurality of optical fibers, and a resin film covering the plurality of optical fibers and the fibrous filler from outside. In the optical fiber unit, the resin film has a film thickness smaller than a diameter of the fibrous filler.

An optical fiber cable for providing enhanced sealing and enhanced access to an optical fiber for field terminations and/or splicing includes a jacket including a cavity extending along a length of the jacket and an optical fiber that is located in the cavity and extends the length of the jacket. The cavity is configured to have a length in a first direction that is greater than a width in a second direction that is perpendicular to the first direction. The jacket is configured to include a selectively teared portion that is located between the cavity and an outer surface of the jacket in the first direction such that the jacket is configured to tear along the length of the jacket at the selectively teared portion so as to allow for enhanced access to the optical fiber in the cavity, and the selectively teared portion created by the cavity is configured to permit the outer surface of the jacket to include a surface portion adjacent the selectively teared portion that is configured to provide enhanced sealing during operation of the optical fiber cable.

In an aspect of the present disclosure, a submarine device includes a main tail cable connected to a submarine cable, a first branch tail cable including a first group of optical fibers among a plurality of optical fibers included in the main tail cable, a second branch tail cable including a second group of optical fibers among the plurality of optical fibers, a branch member that couples the main tail cable to the first and second branch tail cables and including therein a through hole for branching the plurality of optical fibers included in the main tail cable into the first group and the second group, and a device main body including a first introduction part for introducing the first branch tail cable into the device main body and a second introduction part for introducing the second branch tail cable into the device main body.

An optical fiber cable with movable rip cord is provided. The optical fiber cable (100, 200, 300) comprises a core (110) having one or more optical transmission elements (114), a first layer (106) surrounding the core, a second layer (102) surrounding the first layer, wherein the second layer is relatively harder than the first layer and one or more rip cords (108) placed between the first layer and the second layer such that the one or more rip cords have a degree-of-angular movement less than ±d, wherein d is an angular distance between two consecutive rip cords of the optical fiber cable. The first layer is deformed radially towards a central axis (X) of the optical fiber cable in vicinity of the one or more rip cords, wherein deformation (116) of the first layer is equal to or greater than a diameter of the one or more rip cords.

The present disclosure provides an optical fiber cable (200, 300) with a compressed core (206, 306) and manufacturing method thereof. The method includes bundling a plurality of optical transmission elements (202, 302) to form a core (206, 306) of the optical fiber cable (200, 300) and compressing the core (206, 306). The method further includes extruding a sheath (212, 312) around the compressed core (206, 306), wherein the core (206, 306) is compressed to a smaller diameter by a compression tool. The compression tool has a cylindrical cavity, wherein an internal diameter of the cylindrical cavity gradually decreases from a first end to a second end of the compression tool. The core enters from the first end of the compression tool with a diameter d and exits from the second end with a diameter d-Δd, such that Δd/d is greater than or equal to 0.05.

Embodiments of an optical fiber cable are provided. The optical fiber cable includes at least one optical fiber, a buffer tube surrounding the at least one optical fiber, and at least one tensile element wound around the buffer tube. The at least one tensile element has a laylength of at least 200 mm. The optical fiber cable also includes an exterior jacket surrounding the tensile element. The exterior jacket is made up of at least one polyolefin, at least one thermoplastic elastomer, and at least one high aspect ratio inorganic filler. Further, the exterior jacket has an averaged coefficient of thermal expansion of no more than 120 (10.sup.−6) m/mK.

The present disclosure relates to a hybrid cable having a jacket with a central portion positioned between left and right portions. The central portion contains at least one optical fiber and the left and right portions contain electrical conductors. The left and right portions can be manually torn from the central portion.

An optical cable and method for forming an optical cable is provided. The cable includes a cable jacket including an inner surface defining a channel and an outer surface and also includes a plurality of optical fibers located within the channel. The cable includes a seam within the cable jacket that couples together opposing longitudinal edges of a wrapped thermoplastic sheet which forms the cable jacket and maintains the cable jacket in the wrapped configuration around the plurality of optical fibers. The method includes forming an outer cable jacket by wrapping a sheet of thermoplastic material around a plurality of optical core elements. The method includes melting together portions of thermoplastic material of opposing longitudinal edges of the wrapped sheet such that a seam is formed holding the sheet of thermoplastic material in the wrapped configuration around the core elements.

An optical fiber cable includes a jacket and a plurality of stranded core subunits, each core subunit comprising a flexible sheath and a plurality of ribbons arranged in a ribbon group, wherein each ribbon of the plurality of ribbons comprises a plurality of connected fibers such that 50-70% of the cross-sectional area inside the sheath is occupied by the connected fibers. The flexible sheath may be an extruded PVC material that conforms to the shape of the ribbon stack and keeps all of the ribbons acting as a unitary body during bending.