How to Properly Cut Fiber Optic Cables

Cutting fiber optic cables requires precision, specialized tools, and strict safety measures to ensure clean cuts and minimal signal loss.

Safety Precautions

Fiber optic cables are fragile and can produce tiny glass shards that are hazardous. Always:

• Wear safety goggles to protect your eyes from airborne fibers.
• Use gloves to prevent cuts from glass strands.
• Work in a well-ventilated area, especially if using cleaning chemicals or adhesives.
• Follow OSHA and company safety guidelines when handling and cutting cables .

Tools Required

• Fiber optic cleaver: Produces a clean, perpendicular cleave for low-loss splicing.
• Fiber optic strippers: Remove outer jackets and buffer coatings without damaging the core fibers.
• Cable cutters: Cut through the outer sheath and strength members like Kevlar.
• Kevlar scissors: Specifically for cutting Kevlar strands.
• Utility knife or razor blade: For scoring the jacket if needed, used carefully .

Step-by-Step Cutting Procedure

1. Remove the outer jacket: Use a cable cutter or utility knife to score and peel off the outer sheath without damaging internal fibers.
2. Handle Kevlar strands: Twist the Kevlar fibers into a rope-like strand and snip them with metal or Kevlar scissors.
3. Prepare the fiber core: Strip the buffer coating using a fiber optic stripper to expose the glass fiber.
4. Clean the fiber: Wipe the exposed fiber with a lint-free cloth and fiber optic cleaning solution to remove debris.
5. Cleave the fiber: Place the fiber in a cleaver and follow the manufacturer's instructions to produce a flat, perpendicular cut. A precise cleave minimizes reflection and scattering, ensuring optimal signal transmission .
6. Inspect the cut: Check for smoothness and perpendicularity; any imperfections can degrade signal quality.

Additional Tips

• Avoid bending the cable beyond its minimum bend radius to prevent damage.
• Do not apply excessive pulling force or crush the cable, as this can alter transmission characteristics.
• Replace cleaver blades regularly to maintain clean cuts.
• For splicing or termination, always ensure the fiber ends are perfectly aligned and free of debris . Following these steps ensures safe, precise, and reliable fiber optic cable cuts, maintaining signal integrity and long-term network performance.