Disclosed is an armored fire resistant fiber optic cable including a core comprising a central strength member, and a plurality of buffer tubes arranged around said central strength member, each buffer tube containing a plurality of optical fibers; a first mica layer arranged around the core; an inner sheath surrounding the first mica layer; a metal wire armor surrounding the inner sheath; and an outer sheath surrounding and in direct contact with the metal wire armor, wherein a second mica layer surrounds the inner sheath and the metal wire armor surrounds the second mica layer.

The present invention relates to an optical fiber cable (200) with a different binder pitch comprising a plurality of tubes (204) with one or more optical transmission elements (202), a first binder (208) and a second binder (210) wound around the plurality of tubes (204) helically. The first lay length of the first binder (208) is different than a second lay length of the second binder (210) and a lay ratio of the first lay length to the second lay length is equal to or more than 1.2. And the difference between a first stranding angle and a second stranding angle of the first binder (208) and the second binder (210) respectively is greater than or equal to 5 degrees.

An optical fiber cable including a central strength member extending along a longitudinal axis of the optical fiber cable and a plurality of buffer tubes that are wound around the central strength member. Each of the plurality of buffer tubes includes a first material having a modulus of elasticity of at most 600 MPa at room temperature and a peak heat release rate (PHRR) of at most 300 kW/m.sup.2 as measured according to ASTM E1354. A cable jacket is disposed circumferentially around the plurality of buffer tubes and extends along the longitudinal axis.

An optical fiber cable may include a cable jacket, a rigid tensile reinforcement member centered within the cable jacket, and a plurality of partially bonded optical fiber ribbons around the rigid tensile reinforcement member. The optical fiber cable does not include any buffer tubes but may include a cushioning layer adjacent the ribbons.

A jacket is provided to the outer circumference of a cable core, a rip cord, and a tension member. The cable core, the rip cord, and the tension member are collectively covered by the jacket. A wrapping tape is longitudinally placed on the outer circumference of a core part so as to be wound therearound. Thus, immediately after the wrapping tape is longitudinally placed and wound, a wrap part thereof is formed so as to lie substantially straight in the axial direction of an optical fiber cable. In contrast, in an optical fiber cable, the cable core is obtained by combining and intertwining the core part and the wrapping tape. Because of this configuration, the wrap part of the wrapping tape is helically disposed in the longitudinal direction.

A cable may include an optical fiber and a tight buffer layer formed around the optical fiber. Additionally, a conductive toner wire may be coupled to the tight buffer layer in order to reduce shrinkage of the tight buffer layer due to low temperatures. A maximum distance between the optical fiber and the toner wire may be 1.0 mm.

An optical cable includes a plurality of buffer tubes, each of the buffer tubes includes a flexible ribbon, the flexible ribbon including a plurality of optical fibers, the flexible ribbon being wrapped with a finished tape.

A fiber optic and electrical connection system includes a fiber optic cable, a ruggedized fiber optic connector, a ruggedized fiber optic adapter, and a fiber optic enclosure. The cable includes one or more electrically conducting strength members. The connector, the adapter, and the enclosure each have one or more electrical conductors. The cable is terminated by the connector with the conductors of the connector in electrical communication with the strength members. The conductors of the connector electrically contact the conductors of the adapter when the connector and the adapter are mechanically connected. And, the conductors of the adapter electrically contact the conductors of the enclosure when the adapter is mounted on the enclosure.

A rollable optical fiber ribbon utilizing low attenuation, bend insensitive fibers and cables incorporating such rollable ribbons are provided. The optical fibers are supported by a ribbon body, and the ribbon body is formed from a flexible material such that the optical fibers are reversibly movable from an unrolled position to a rolled position. The optical fibers have a large mode filed diameter, such as ≥9 microns at 1310 nm facilitating low attenuation splicing/connectorization. The optical fibers are also highly bend insensitive, such as having a macrobend loss of ≤0.5 dB/turn at 1550 nm for a mandrel diameter of 15 mm.

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.