Butterfly-shaped optical cable connector

Butterfly-shaped optical cables can be connected using fusion splicing, mechanical splicing, or pre-terminated SC-type connectors, depending on the application and required permanence.

Understanding Butterfly Optical Cables

Butterfly optical cables, also called flat drop fiber cables, have a central optical fiber unit flanked by two strength members, giving them a flat, symmetrical "winged" profile. This design allows for tight indoor routing along walls, conduits, or window frames, and supports fibers like G.657A1 or G.657A2 that tolerate small bend radii without signal loss .

Connection Methods

1. Fusion Splicing

Fusion splicing is a permanent method that welds two fiber ends together using heat:

• Strip the protective jacket and coating from the fiber ends.
• Align the bare fibers precisely using a fusion splicing machine.
• Apply a high-voltage arc to fuse the fibers into a single, continuous strand.
• This method produces low-loss, high-reliability connections and is suitable for long-term installations .

2. Mechanical Splicing

Mechanical splicing does not require heat and is often used for temporary or field connections:

• Insert the stripped fiber ends into a mechanical splice connector.
• Align the fibers using the internal alignment mechanism.
• Tighten the connector to hold the fibers securely in place.
• While slightly higher in insertion loss than fusion splicing, mechanical splicing is faster and easier for temporary setups .

3. Pre-Terminated SC-Type Butterfly Connectors

SC-type connectors for butterfly cables are pre-assembled and designed for high tensile strength and reliability:

• The optical fiber passes through a ferrule and metal stopper inside the connector.
• The strength members are crimped to the inner frame sleeve to secure the cable.
• The connector provides a ready-to-use, stable connection for FTTH or FTTB applications without splicing .

4. Fusion-Free Fast Connector Adapters

For rapid, fusion-free connections:

• Insert the butterfly cable into the adapter's tail sleeve.
• The dual-fiber docking channels automatically align the fibers using optical silicone gel.
• Close the docking switch to secure the connection.
• This method is ideal for quick deployment and maintenance while maintaining signal integrity .

Installation Tips

• Always maintain the minimum bend radius (e.g., 7.5 mm for G.657A2 fibers) to prevent micro-bending losses .
• Use proper stripping tools to avoid nicking the fiber coating.
• Route cables along flat surfaces using clips or raceways, and avoid twisting or excessive pulling.
• For conduit runs, ensure the fill ratio does not exceed 40% to reduce stress on the fiber . By selecting the appropriate connection method and following careful handling procedures, butterfly-shaped optical cables can be connected efficiently while maintaining high signal quality and long-term reliability.