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Butterfly-shaped optical cable type of optical cable

Fiber and communications infrastructure knowledge brief Published 22 Dec 2023

Prepared for preliminary research by the ENSAA knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

Butterfly-shaped optical cables are flat, wing-like fiber optic cables designed for easy installation, bend resistance, and reliable data transmission in indoor and outdoor environments. Design and StructureButterfly-shaped optical cables get their name from their distinctive flat, wing-like cross-section, with the optical fiber positioned at the center and two parallel strength members on either side, typically made of Fiber Reinforced Plastic (FRP) for non-metallic durability and electromagnetic immunity. Some outdoor variants include a steel wire messenger for aerial self-supporting runs.

This geometry allows the cable to bend easily in the flat plane while resisting sharp kinks when bent edge-on, protecting the fiber core.

Fiber Type

These cables almost universally use bend-insensitive single-mode fibers, conforming to ITU-T G. 657 standards. Subtypes like G.

657. A1 are suitable for residential and light commercial use, tolerating 10 mm bend radii and fully compatible with legacy G. 652.

D infrastructure. G. 657.

A2 is recommended for routing through conduits with tight bends or irregular surfaces.

Variants

Indoor Butterfly Cables (GJXH): Lightweight, flexible, with FRP strength members and LSZH (Low Smoke Zero Halogen) sheath. Fiber counts range from 1–4 cores for single-unit residential use up to 12 cores for multi-tenant buildings.

Outdoor Self-

Supporting Butterfly Cables (GJYXFCH/GJXFH): Include a steel messenger wire, PE or dual-layer LSZH/PE jacket for UV and moisture resistance, suitable for aerial drops up to 50 meters. Armoured Butterfly Cables: Designed for FTTH and high-density applications, offering additional protection and durability for indoor and outdoor use.

Applications

Butterfly cables are widely used in: Telecommunications networks for FTTH and CATV connections. Data centers for high-density, space-efficient fiber routing. Industrial automation and medical equipment, where reliability and precision are critical.

Audio-visual systems, providing low-loss, high-quality signal transmission.

Installation and Splicing

Butterfly cables can be connected using: Fusion splicing: Produces low-loss, permanent connections by welding fiber ends with heat. Mechanical splicing: Uses connectors to align and hold fiber ends without heat, suitable for temporary or field connections.

Advantages

Bend resistance reduces signal loss and fiber damage. Directional flexibility simplifies routing along walls, ceilings, and conduits. Durability with FRP or steel reinforcement for compression and tensile strength.

Environmental protection with LSZH or PE jackets for indoor/outdoor use. Butterfly-shaped optical cables combine compact design, flexibility, and robust performance, making them ideal for modern high-speed fiber networks in both residential and commercial deployments.

Butterfly-shaped optical cable type of optical cable - ENSAA OPTICAL NETWORKS [PDF]

Butterfly-shaped optical cable type of 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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