How to splice the monitoring tail cable of the optical fiber cable

Splicing a monitoring tail cable is best done using fusion splicing, which precisely joins the fiber ends to ensure low-loss, high-quality connections.

Tools and Materials Needed

• Fusion splicer: Aligns and fuses fiber ends using an electric arc ( ).
• Fiber strippers: Remove the outer jacket and coating without damaging the glass core ( ).
• High-precision cleaver: Cuts the fiber at a perfect 90° angle for optimal fusion ( ).
• Cleaning supplies: Lint-free wipes and 99% isopropyl alcohol to remove dust and oils ( ).
• Splice protection sleeves: Heat-shrink tubes with a steel core to protect the splice ( ).

Step-by-Step Fusion Splicing Process

1. Prepare the Fiber
   • Strip approximately 30–40 mm of the outer jacket using fiber strippers.
   • Remove the acrylate coating carefully to expose the bare glass fiber.
   • Clean the fiber thoroughly with lint-free wipes and alcohol until it “squeaks” when rubbed ( ).
2. Cleave the Fiber
   • Place the cleaned fiber in the cleaver's V-groove.
   • Score and snap the fiber to create a flat, perpendicular end. Proper cleaving is critical for low-loss splicing ( ).
3. Insert Fibers into the Splicer
   • Place both fiber ends into the fusion splicer's holders.
   • Ensure the fibers are aligned precisely using the splicer's mechanical adjustment system ( ).
4. Perform the Fusion Splice
   • Select the appropriate fiber type in the splicer menu.
   • Start the splicing process; the splicer generates an electric arc to weld the fiber cores together.
   • The process is automated and typically takes a few seconds ( ).
5. Protect the Splice
   • Slide a splice protection sleeve over the fused joint.
   • Heat the sleeve in the splicer's built-in oven to shrink it and secure the splice ( ).
6. Test the Splice Quality
   • Use an insertion loss meter or OTDR to verify the splice quality.
   • Ensure the connection meets the required attenuation and reflectivity standards ( ).

Tips for Success

• Always maintain a dust-free environment; even small particles can degrade the splice ( ).
• Handle fibers carefully to avoid breakage; fiber shards can be hazardous ( ).
• Use factory-polished pigtails when possible to simplify the process and reduce signal loss ( ).
• Mechanical splicing is an alternative for temporary or quick connections but generally has higher insertion loss than fusion splicing ( ). By following these steps and using the proper tools, you can achieve a reliable, low-loss splice for monitoring tail cables in optical fiber networks, ensuring optimal signal transmission and network performance.