Fiber optic cable stripping fixing and splicing

Fiber optic splicing begins with careful cable stripping, followed by precise fiber preparation, and ends with either mechanical or fusion splicing for a low-loss, permanent connection. Step 1: Cable Preparation and StrippingBefore splicing, the fiber optic cable must be prepared by removing protective layers without damaging the fibers. Start by using a cable stripper to peel off the outer jacket and any inner coatings, exposing the buffer tubes and strength members.

For loose tube or armored cables, remove the outer jacket, separate the buffer tubes, and cut one tube to expose the fibers. If the cable is gel-filled, clean the gel with an appropriate solvent. Always wear safety glasses and work in a clean area to avoid injury from sharp fiber fragments.

Step 2: Fiber StrippingOnce the fibers are exposed, use a fiber optic stripper to remove the buffer coating from the fiber itself. Tight buffer fibers (900 micron) and standard buffered fibers (250 micron) require careful stripping to avoid nicking or breaking the fiber. Strip the fiber to the length recommended for your splice, typically around 50–100 mm, and ensure the fiber is clean and free of debris.

Step 3: Cleaving the FiberAfter stripping, the fiber end must be cleaved to create a smooth, flat end face. A high-quality cleave is critical for minimizing light loss and back reflection during splicing. Use a fiber cleaver and follow the manufacturer's instructions to achieve a precise cut.

Step 4: SplicingThere are two main splicing methods: Mechanical Splicing: Fibers are aligned in a mechanical fixture with an index-matching gel to allow light to pass through. This method is quick, temporary, and typically has a loss of around 0. 3 dB.

Fusion Splicing: Fibers are permanently joined using a fusion splicer, which aligns the fibers and applies an electric arc to fuse the glass ends. Fusion splicing provides a low-loss connection (around 0. 1 dB) and nearly zero back reflection.

Insert a fiber protection sleeve before splicing to protect the joint, and ensure the splicer's electrodes, V-groove, and lenses are clean. Step 5: Post-Splice ProtectionAfter splicing, slide the fiber protection sleeve over the splice and heat it in the splicer's heating zone to secure the joint. This ensures mechanical stability and protects the fiber from environmental stress.

Tools and Safety

Essential tools include a cable stripper, fiber stripper, cleaver, fusion splicer, alcohol, dust-free cloth, and fiber protection sleeves. Always follow safety protocols, wear eye protection, and dispose of fiber scraps properly. By following these steps, you can achieve a high-quality, low-loss fiber optic splice, whether for network installation, repair, or extending cable runs.