Stripping optical fiber involves carefully removing the protective jacket and buffer layers to expose the bare fiber for splicing or termination.

Overview

Stripping fiber optic cable is a critical step in preparing fibers for fusion splicing or connectorization. Proper stripping ensures a clean, defect-free fiber end, which is essential for optimal signal transmission and network performance. Damaging the fiber during stripping, even with a small nick or scratch, can lead to cracks or connection failures under stress or thermal cycling .

Tools Required

• Fiber optic strippers: Specialized tools with grooves for different fiber diameters (e.g., 900 µm and 250 µm buffers) to remove coatings without breaking the fiber .
• Kevlar scissors: For cutting the cable jacket and aramid yarn.
• Alcohol wipes or cleaning solution: To clean the stripped fiber end.
• Fiber cleaver: To create a clean, perpendicular end face.
• Inspection microscope or Visual Fault Locator (VFL): To check the cleaved fiber for defects.

Step-by-Step Stripping Process

1. Safety first: Wear safety glasses and work in a clean, well-lit area free of dust and debris .
2. Cut the cable jacket: Use Kevlar scissors to cut the cable at the desired location.
3. Remove the outer jacket: Use the largest groove on the fiber stripper to gently cut and pull off about 2 inches (50 mm) of the jacket .
4. Trim aramid fibers: Cut the aramid yarn close to the jacket end and wind them into a bundle for easier handling.
5. Strip the buffer layers: Remove the 900 µm and 250 µm buffer coatings in small steps (about 6–8 mm at a time), holding the stripper at a 45-degree angle to reduce stress on the fiber .
6. Clean the fiber: Use alcohol wipes or a microfiber cloth to remove debris and ensure a clean surface for termination .
7. Cleave the fiber: Use a fiber cleaver to create a smooth, perpendicular end face.
8. Inspect the fiber: Check the cleaved end under a microscope or with a VFL to ensure it is free of defects .
9. Protect the fiber: Cover the prepared ends with protective caps or sleeves until termination.

Best Practices

• Strip each layer progressively; do not attempt to remove all layers at once .
• Avoid excessive force to prevent micro-cracks in the fiber.
• Dispose of fiber scraps safely in a marked container to prevent injury .
• Follow manufacturer guidelines for stripper blade depth and cleaver settings.

Methods of Stripping

• Mechanical stripping: Uses hand tools or automated strippers to remove coatings without chemicals .
• Chemical or thermal stripping: Uses hot sulfuric acid or controlled hot air to remove coatings, typically in specialized preparation units . Proper stripping and preparation of fiber optic cables are essential for reliable network performance, minimizing signal loss, and preventing costly repairs in the field .