Butterfly-shaped drop cable and fiber optic composite

Butterfly-shaped drop cables are flat, compact fiber optic cables designed for efficient FTTH deployment, combining optical fibers with strength members for durability and flexibility.Design and StructureButterfly-shaped drop cables, also known as flat drop fiber cables, feature a flat, butterfly-like cross-section with optical fibers positioned at the center and reinforced by parallel strength members on both sides, typically made of FRP (Fiber Reinforced Plastic) or steel wire for high tensile strength . The outer sheath is usually LSZH (Low Smoke Zero Halogen) or PVC, providing fire safety indoors, while UV-resistant PE sheaths allow outdoor installation . This flat geometry reduces bending stress, prevents rolling or twisting during installation, and simplifies routing along walls, corners, and conduits .Fiber and PerformanceThese cables commonly use single-mode fibers such as G.657A1 or G.657A2, which are optimized for tight indoor routing and offer superior bend resistance, minimizing signal loss in compact environments . The combination of a flat profile and strong tensile members ensures mechanical reliability for both indoor and aerial applications .AdvantagesCompact and lightweight: Small outer diameter and low weight make them easy to handle and install .Durable and flexible: Flat design and strength members provide high tensile performance and resistance to lateral pressure .Cost-effective: Simplified installation reduces labor and construction costs .Versatile applications: Suitable for FTTH networks, building entry solutions, data centers, industrial automation, and medical equipment .Environmental safety: LSZH sheaths reduce toxic emissions indoors, and armored or weather-resistant variants are available for outdoor use .ApplicationsButterfly-shaped drop cables are widely used in FTTH networks, connecting fiber access points to ONTs in homes or offices . They are also employed in 5G hybrid optical-electrical cables, side-by-side signal/data transmission, and long-span weather-resistant deployments for rural or high-tensile applications . Their compact design makes them ideal for high-density data centers, audio-visual systems, and industrial automation setups where space efficiency and reliable data transmission are critical .Installation and ConnectivityThese cables can be connected using fusion splicing for permanent, low-loss connections or mechanical splicing for temporary setups . The flat design simplifies routing in tight spaces, reduces bending stress, and allows for quick, flexible deployment in both indoor and outdoor environments . Butterfly-shaped drop cables thus provide a balanced solution between durability, flexibility, and ease of installation, making them a preferred choice for modern fiber optic access networks and high-density applications.