The optical fibre ribbon of the present disclosure has one or more base access. The optical fibre ribbon of the present disclosure includes a plurality of optical fibres, a coating layer bonding the plurality of optical fibres, and a slit. The slit in the optical fibre ribbon is made between two optical fibres of the plurality of the optical fibres. The optical fibre ribbon has flat surface on top and corrugated surface in bottom. The optical fibre ribbon has a coating layer that is a layer of matrix material. The coating layer is made of single layer of matrix material.

Methods and systems for removing coatings from optical fibers. A system includes a gas source for providing gas, and a heater configured to heat the gas. The system further includes a holder comprising first and second attachment features, wherein the attachment features secure a coated optical fiber along a removal path. The system further includes at least one nozzle connected to the gas source, wherein the at least on nozzle is aimed in a nozzle direction that is towards the removal path at a pitch, such that the nozzle is non-perpendicular towards the removal path. The nozzle further directs a continuous stream of the heated gas towards the coated optical fiber causing the coating of the coated optical fiber to be removed. The methods and systems may employ a second nozzle that may be offset from the first nozzle angularly and/or laterally with respect to the removal path.

The present disclosure provides coating compositions and cured products formed from the coating compositions. The cured products can be formed at high cure speeds from the coating compositions and feature low Young's modulus, high tear strength, and/or high tensile toughness. The cured products can be used as primary coatings for optical fibers. The primary coatings provide good microbending performance and are resistant to defect formation during fiber coating processing and handling operations. The coating compositions include an oligomer, an alkoxylated monofunctional acrylate monomer, and preferably, an N-vinyl amide compound.

A buffer tube for an optical fiber cable provided by the present disclosure includes an optical fiber ribbon stack, a first layer, a second layer, an optical fiber cable, a central strength member, a plurality of buffer tubes, a water blocking layer, and a sheath and plurality of rip cords. The first layer is an inner layer of the buffer tube. The first layer is made of a soft material. The soft material of the first layer is one of low smoke zero halogen, thermoplastic elastomers and thermoplastic polyurethane. The second layer is an outer layer of the buffer tube. The second layer surrounds the first layer. The second layer is made of a hard material. The hard material of the second layer is one of polypropylene, polybutylene terephthalate, and nylon.

An optical fiber cable including an optical fiber ribbon in a pipe, wherein the ribbon includes at least two optical fibers arranged side by side, and wherein at least two of the optical fibers are bonded intermittently along a length of the fibers.

A multi-purpose sealing device is described herein for use in a port structure of fiber terminal, telecommunication enclosure; or a bulkhead. The exemplary sealing device has a body having an open end and a closed end, wherein the closed end includes a removable portion and a pulling device to facilitate removal of the exemplary sealing device from a port structure. In one aspect, the exemplary sealing device is a single part made of a resilient material, while an alternative aspect, the exemplary sealing device includes a rigid connection portion disposed within the open end of the body. The exemplary device can be used as a dust cap or plug prior to making a service connection and/or it can be used as a port/cable sealing device after the service connection is made.

An optical fiber cable includes: a sheath; a core that is housed in the sheath and comprises optical fibers; tensile strength members embedded in the sheath; and ripcords embedded in the sheath. Recesses and protrusions are disposed alternately in a circumferential direction on an outer circumferential surface of the sheath. The recesses each include: two connecting portions respectively connected to radial inner ends of two adjacent protrusions; and a bottom surface positioned between the two connecting portions. In a transverse cross-sectional view, the ripcords are positioned inside some of the protrusions, and the tensile strength members are positioned inside the remaining protrusions.

The present disclosure provides a method for stacking of a plurality of optical fibre ribbons (106). The plurality of optical fibre ribbons (106) is defined by a top surface (S1) and a bottom surface (S2). The top surface (S1) and bottom surface (S2) are defined by a plurality of elevated regions and a plurality of groove regions. The method for stacking of the plurality of optical fibre ribbons (106) includes arranging the plurality of optical fibre ribbons (106) over each other such that the plurality of elevated regions of each of the plurality of optical fibre ribbons fits over the plurality of groove regions of an adjacent optical fibre ribbon of the plurality of optical fibre ribbons (106). In addition, arrangement of the plurality of optical fibre ribbons forms an optical fibre ribbon stack (200).

In a fiber connection structure with optical connectors according to one embodiment, among m first connector port groups, arrangement orders of colors of a plurality of the optical fibers in (2×j−1)th (j is a natural number satisfying 1≤j and 2×j≤m) first connector port groups are the same, and among the m first connector port groups, arrangement orders of the colors of the plurality of optical fibers in (2×j)th first connector port groups are the same. The arrangement order of the colors of the plurality of optical fibers in the (2×j)th first connector port group is a reverse order of the arrangement order of the colors of the plurality of optical fibers in the (2×j−1)th first connector port group.

A fiber optic cable assembly suitable for providing mesh connectivity includes a fiber shuffle region arranged between first and second cable assembly sections that each include multiple tubes each containing a group of optical fibers, with a jacket provided over one or both cable assembly sections. The fiber shuffle region may be compact in width and length, and integrated into a trunk cable. Optical fibers remain in sequential order in groups at ends of the cable assembly sections, where the fibers may be ribbonized and/or connectorized. A fabrication method for such a fiber optic cable assembly is also disclosed.