Skeleton Optical Cable Structure

Skeleton-type optical cables feature a central supporting skeleton with peripheral skeleton grooves that house optical fibers, offering high flexibility, bending resistance, and efficient installation.Structure and DesignA skeleton-type optical cable typically consists of a central skeleton that provides structural support and a peripheral skeleton with grooves or slots where optical fibers or fiber ribbons are placed . The peripheral skeleton is often wrapped around the central skeleton in a predefined pitch, which enhances flexibility and bending performance . The optical fibers are embedded in these grooves in a tight-buffered or ribbon form, ensuring they are protected from external stress and minimizing the risk of fiber breakage . The skeleton grooves are usually made of high-density polyethylene (HDPE) or similar materials, and the cable may include water-blocking tapes and aluminum layers to prevent moisture intrusion and provide additional mechanical protection . A polyethylene sheath is extruded over the skeleton to complete the cable structure.AdvantagesFlexibility and Bending Resistance: The combination of a rigid central skeleton and a flexible surrounding skeleton allows the cable to bend without damaging the fibers .High Fiber Density: Multiple optical fibers or ribbons can be accommodated in the skeleton grooves, enabling compact designs with high core counts .Moisture and Mechanical Protection: Water-blocking tapes and aluminum layers prevent moisture ingress and provide lateral pressure resistance .Ease of Installation and Maintenance: The open or longitudinally slotted design allows for quick access to individual fibers, facilitating splicing and branching in FTTH and access networks .Environmental Compatibility: All-dry designs avoid the use of gels or ointments, reducing pollution during construction and improving long-term reliability .ApplicationsSkeleton-type optical cables are widely used in FTTH (Fiber to the Home) networks, access networks, and interoffice connections where high fiber density, flexibility, and durability are required . They are particularly suitable for environments where cables are subject to bending, temperature changes, or mechanical stress.SummarySkeleton-type optical cables combine a central supporting skeleton with peripheral grooves for optical fibers, providing a balance of mechanical strength, flexibility, and high fiber density. Their design ensures efficient installation, protection against moisture, and reliable long-term performance, making them ideal for modern communication networks .