Which type of optical cable is easier to strip

Stripping optical cables requires using the correct tools and techniques for each layer—outer jacket, strength members, and buffer coatings—while avoiding damage to the delicate glass fiber.

Understanding Cable Layers

Optical cables typically consist of multiple layers:

• Outer jacket (sheath): Flexible plastic protecting the cable, usually 2–3 mm in diameter for single-fiber cables.
• Strength members: Often aramid yarn (Kevlar) providing tensile strength.
• Buffer coating: Acrylate or polymer coating around the glass fiber, typically 250 µm or 900 µm.
• Glass fiber core: 125 µm cladding diameter, the most delicate part that must remain undamaged .

Tools for Stripping

1. Mechanical Fiber Strippers: Handheld tools with precision-ground holes for specific coating diameters. Common three-hole strippers remove the outer jacket, buffer, and acrylate coating efficiently .
2. Fiber Cable Cutting Scissors: Used to cut aramid yarn and small jackets without nicking the fiber .
3. Thermo-Mechanical Strippers: Use heat to soften the coating for gentle removal, ideal for sensitive fibers or lab applications .
4. Specialized Strippers: Flat drop cable strippers or adjustable strippers for non-standard or legacy cables .

Step-by-Step Stripping Process

1. Strip the Outer Jacket: Use a wire or fiber stripper sized for the jacket. Cut carefully to avoid damaging underlying aramid yarn .
2. Expose Strength Members: Cut or pull back aramid yarn using scissors or pliers. Avoid pulling fibers that could stress the glass core .
3. Remove Buffer Coating: Use a precision fiber stripper to remove the buffer coating down to the 125 µm cladding. Ensure the stripper is calibrated for the fiber diameter to prevent nicks or scratches .
4. Final Fiber Preparation: After stripping, clean the exposed fiber with alcohol wipes if necessary, and inspect for damage before splicing or connectorization .

Safety Considerations

• Always wear safety glasses to protect against fiber shards.
• Work in a clean, well-lit area to prevent contamination.
• Dispose of fiber scraps properly to avoid injury .
• Maintain tools regularly to keep cutting edges sharp and precise .

Tips for Different Cable Types

• Single-fiber patch cables: Standard three-hole strippers are usually sufficient.
• Multi-layer or indoor cables: Strip each layer progressively, as each may require a different tool or length.
• Flat drop cables: Use specialized flat cable strippers to avoid damaging internal fibers .
• Specialty fibers (e.g., 200 µm coatings or plastic optical fibers): Adjust stripper settings or use thermal/chemical methods as appropriate . By following these steps and using the correct tools for each cable type, you can safely and efficiently strip optical cables for splicing, termination, or testing.