Basic Structure of FTTH Optical Cable

FTTH optical cables are designed for high-speed, long-distance data transmission with compact, flexible, and durable structures suitable for indoor and outdoor deployment. Core FiberFTTH cables use single-mode or multimode optical fibers as the core transmission medium, typically made from pure or doped silica, with precise core and cladding diameters to optimize signal propagation and minimize attenuation and dispersion. Single-mode fibers are most common for FTTH due to their low loss and high bandwidth over long distances.

Cable StructureFTTH cables are engineered for compactness, flexibility, and ease of installation. Key structural features include: Indoor Suspended (Skin) Cables: Small bending radius fibers with excellent anti-bending performance, safe for indoor wiring, and easy to fix without specialized tools.

Self-

Supporting “8” Wiring Cables: Compact, soft, and suitable for overhead installation. The “8” structure separates suspension parts from fiber units, allowing direct connection to the user terminal without additional hanging wires or hooks. Protective LayersFTTH cables include multiple layers for mechanical and environmental protection: Primary Coating: Protects the fiber from microbending and environmental stress.

Buffer Tube or Loose Tube: Encases fibers to allow flexibility and reduce stress during installation. Strength Members: Aramid yarns or steel wires provide tensile strength for aerial or underground deployment. Outer Jacket: Polyethylene or PVC jackets protect against moisture, UV, and physical damage.

Branching and Connectivity

Modern FTT

H cables are designed for convenient branching and wiring, enabling easy connection to splitters, distribution points, and user terminals. They support 1: N splitting ratios (commonly 1: 2 to 1: 64) for passive optical networks, allowing a single fiber to serve multiple users. Standards and PerformanceFTTH cables comply with ITU-T and IEC standards, such as G.

652, G. 657, ensuring low attenuation, minimal macro-bending loss, and compatibility with GPON and other optical network technologies. They are optimized for long service life, high transmission rates, and wide bandwidth, supporting future network expansion and high-speed broadband services.

Installation ConsiderationsFTTH cables are designed for easy installation and maintenance, with features like: Small diameter and lightweight for indoor and aerial deployment. High flexibility to navigate tight spaces and corners. Self-supporting designs to reduce the need for additional infrastructure.

These structural characteristics make FTTH optical cables reliable, versatile, and efficient for delivering high-speed broadband directly to homes and businesses.