Splicing armored fiber optic pigtails involves carefully stripping, cleaning, cleaving, and fusion-splicing the fiber, then protecting the joint with a heat-shrink sleeve inside a splice tray.

Understanding Armored Pigtails

Armored fiber optic pigtails are enclosed in a stainless steel or strong steel tube within the outer jacket, providing extra protection against physical damage, rodents, and environmental stress . They are commonly used in outdoor, industrial, or high-risk installations. The splicing process is similar to standard pigtails but requires careful handling due to the additional armor layer.

Tools and Materials Needed

• Fusion splicer: Aligns and fuses the fiber ends using an electric arc .
• Fiber strippers: Remove the outer jacket and coating without nicking the glass .
• High-precision cleaver: Cuts the fiber at a perfect 90° angle for low-loss splicing .
• Lint-free wipes and 99% isopropyl alcohol: For cleaning the bare fiber .
• Heat-shrink splice protection sleeves: Protect the fused joint .
• Armored cable cutters or pliers: To carefully remove the steel armor without damaging the fiber .

Step-by-Step Splicing Procedure

1. Slide on the protection sleeve: Place the heat-shrink sleeve onto the fiber before stripping or cleaving. It cannot be added after splicing .
2. Remove the armor and outer jacket: Use specialized cutters to carefully strip the stainless steel or steel tube, exposing the inner fiber without nicking it .
3. Strip the fiber coating: Use a fiber stripper to remove the buffer coating, exposing about 30–40 mm of bare glass .
4. Clean the fiber: Wipe the bare fiber with lint-free wipes soaked in isopropyl alcohol until it is free of dust and oils .
5. Cleave the fiber: Use a high-precision cleaver to cut the fiber at a perfect 90° angle. A poor cleave will result in high splice loss .
6. Load fibers into the fusion splicer: Place both the pigtail and the incoming fiber into the V-grooves of the splicer. The splicer aligns the cores automatically .
7. Fuse the fibers: Start the splicer to create a continuous optical path. The splicer will display estimated splice loss in dB .
8. Protect the splice: Slide the heat-shrink sleeve over the fused joint and bake it in the splicer's oven to secure the connection .
9. Place in a splice tray: For armored pigtails, ensure the joint is secured inside a splice tray or closure to prevent mechanical stress and environmental exposure .

Best Practices

• Always handle armored fibers carefully to avoid bending or breaking the inner glass.
• Clean and inspect each fiber end before splicing to minimize signal loss.
• Use appropriate splice trays designed for armored cables to maintain network reliability.
• For outdoor installations, ensure the splice closure is weatherproof to protect against moisture and temperature changes . By following these steps, you can achieve a low-loss, durable splice for armored fiber optic pigtails, ensuring reliable network performance in demanding environments.