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Thickened 4-core optical cable

Fiber and communications infrastructure knowledge brief Published 21 Apr 2025

Use this reference to prepare product questions for BAGYOU FIBRE. Check interfaces, capacity, protection and installation requirements against the current product documentation.

A thickened 4-core optical cable is a fiber optic cable with four individual fibers, reinforced for durability and suitable for indoor or outdoor installations.

Structure and Components

A 4-core optical cable contains four optical fibers within a single protective jacket, allowing independent data transmission. Each fiber can support duplex links or redundancy configurations, such as one duplex link plus two backup fibers for reliability. Key components include: Optical Fibers: Glass or plastic strands that carry light signals.

Strength Members: Steel wires for outdoor cables or Aramid yarn/Kevlar for indoor cables, providing tensile strength and preventing stretching. Buffer Tubes: Loose tubes (gel-filled) or tight buffers that protect the fibers from mechanical stress. Outer Jacket: Polyethylene (PE) for waterproof outdoor use or Low Smoke Zero Halogen (LSZH) for indoor safety.

Thickened Design Features

Thickened cables are designed to enhance durability and mechanical protection, making them suitable for harsh environments. Features include: Water-blocking and UV resistance for outdoor deployment. Rodent protection and reinforced jackets to prevent damage during installation or underground laying.

Dielectric or steel strength members to provide tensile and anti-buckling strength. Compact loose tube construction to maintain flexibility while protecting fibers. Fiber Types and ApplicationsSingle-mode (OS2): Ideal for long-distance transmission.

Multimode (OM4): Suitable for high-speed, short-distance networks.

Indoor/

Outdoor Use: Compliant with fire safety standards (IEC, EuroClass Cca/B2ca) for indoor use, while outdoor versions are water-blocked and UV-resistant.

Installation Considerations

Thickened 4-core cables are typically supplied on drums for lengths over 100 meters and include pulling aids to facilitate installation. The color coding of fibers follows international standards (Blue, Orange, Green, Brown) to simplify splicing and termination. These cables are suitable for aerial, duct, or direct-buried applications, providing reliable performance in both commercial and industrial networks.

In summary, a thickened 4-core optical cable combines multiple fibers with reinforced mechanical protection, making it ideal for robust, high-performance network installations in diverse environments.

Thickened 4-core optical cable - BAGYOU FIBRE NETWORKS [PDF]

Thickened 4-core optical cable

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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