Properly coiling fiber optic cables after splicing ensures minimal signal loss, protects the splice, and keeps the fiber organized for future maintenance.

Preparation Before Coiling

Before coiling, ensure the fiber optic cable and pigtail are pre-processed and opened. Calculate the reserved length needed for the splice tray or enclosure, as uneven lengths can lead to poor coiling and potential damage. Always handle fibers carefully to avoid sharp bends, which can increase attenuation or break the fiber .

Rules for Coiling

• Coil once per splice: After splicing and heat-shrinking the protective sleeve, coil the fiber in a single loop to prevent tangling or overlapping.
• Avoid bird's-nest coiling: Fibers should be neatly arranged to facilitate future maintenance and reduce stress on the splice.
• Maintain minimum bend radius: Ensure the fiber does not bend more sharply than recommended (typically >30 mm radius) to prevent signal loss .

Methods of Coiling

1. Middle-first method: Place the heat-shrunk sleeves in the fixing groove first, then coil the remaining fiber on both sides. This is ideal for small splice trays or when space is limited.
2. End-first method: Start coiling from one end, fix the heat shrink tube, and then coil the remaining fiber on the other side. This method is flexible and faster, suitable for longer fibers.
3. Special situations: For fibers that are unusually long or short, coil them separately at the end. Special optical devices may require individual handling .

Best Practices

• Keep fibers tidy and organized to simplify future maintenance.
• Ensure low additional loss by avoiding tight loops or overlapping fibers.
• Use splice trays or enclosures designed to hold coiled fibers securely.
• Inspect the coiled fibers visually to confirm there are no sharp bends or kinks . By following these steps, fiber optic cables can be coiled safely and efficiently, protecting the splices and ensuring long-term network reliability.