Correct Connection Method for Armored Optical Cable Terminal Connectors

Proper termination of armored optical cables requires careful stripping, cleaning, securing the armor, and precise connector installation to ensure low-loss, reliable fiber connections.

Preparation and Tools

Before starting, ensure you have the correct tools and materials: inspect the cable for damage, confirm the fiber type (singlemode or multimode), and verify connector compatibility. Armored cables are heavier and stiffer than standard fiber, so plan the routing path, maintain minimum bend radii, and ensure conduits or trays can accommodate the cable diameter . Tools typically include fiber strippers, cleavers, polishing kits, microscopes for inspection, and crimping tools if using mechanical connectors .

Stripping and Cleaning

1. Remove the outer jacket and armor carefully without nicking the fiber. Stainless steel or Kevlar layers require specialized cutters or strippers.
2. Expose the inner fiber and buffer tube, then clean the fiber with isopropyl alcohol to remove debris and contaminants .
3. Maintain bend radius during handling to prevent microbends or stress that can increase optical loss.

Connector Termination

1. Select the appropriate connector for your fiber type (LC, SC, ST, or specialized armored connectors). Singlemode fibers often use FC or SC connectors, while multimode may use ST or SC .
2. Attach the fiber to the connector using epoxy or anaerobic adhesive for permanent connections, or use preloaded “hot melt” connectors for field installations .
3. Polish the ferrule end to achieve a smooth, defect-free surface. Proper polishing reduces insertion loss and back reflection, critical for high-speed networks .
4. Inspect the connector under a microscope to ensure the end face is free of scratches, pits, or cracks. A visually clean connector is highly likely to perform well .

Securing the Armor

1. Use a shield bond or crimping method to secure the armored layer to the connector body, preventing movement that could stress the fiber .
2. Ensure proper strain relief by tightening the connector's armor clamp or crimping the braid over the nut, following manufacturer specifications .
3. Avoid over-tightening, which can crush the fiber or damage the connector.

Testing and Verification

After termination, test the connection for insertion loss and reflectance using an optical power meter or OTDR. Properly terminated armored fiber should meet the system's loss budget and reflectance specifications .

Best Practices

• Always follow manufacturer-specific instructions for armored connectors.
• Maintain clean working conditions to prevent contamination.
• Use inspection microscopes to verify connector quality before deployment.
• Document each termination for future maintenance and troubleshooting. By following these steps—careful stripping, cleaning, precise connector attachment, armor securing, and testing—you ensure durable, low-loss, and reliable connections for armored optical fiber installations .