Methods for connecting armored optical cables and pigtails

Armored optical cables are typically connected to pigtails using fusion or mechanical splicing, often with armored pigtails to protect the fiber and ensure reliable, low-loss connections.

Understanding Armored Pigtails

Armored pigtails are fiber optic pigtails encased in a stainless steel or strong metal tube within the outer jacket, designed to protect the fiber from mechanical stress, rodents, and environmental hazards. They are ideal for connecting to armored optical cables, which have additional layers of protection such as steel or aramid strength members. Using armored pigtails ensures that the transition from the armored cable to the connectorized end is robust and maintains network reliability.

Splicing Methods1.

Fusion Splicing

Fusion splicing is the most common and reliable method for connecting armored cables to pigtails. The process involves: Stripping the armored cable to expose the bare fiber. Cleaning and cleaving the fiber ends.

Using a fusion splicer to melt the fiber ends together, creating a permanent, low-loss joint. Placing the splice in a splice tray for protection. Fusion splicing is preferred for single-mode fibers and long-distance links because it minimizes insertion loss and back reflection.

2.

Mechanical Splicing

Mechanical splicing is an alternative when fusion splicing equipment is unavailable. It involves: Aligning the fiber ends in a mechanical splice holder. Using index-matching gel or adhesive to maintain optical continuity.

Securing the splice in a protective enclosure. Mechanical splicing is faster but generally has slightly higher insertion loss than fusion splicing.

Connector Types

Armored pigtails come with various factory-terminated connectors such as SC, FC, ST, or MU, in UPC or APC polish types. The connector end plugs into equipment, ODF ports, or distribution boxes, while the bare fiber end is spliced to the armored cable. Selection depends on network requirements and equipment compatibility.

Installation Considerations

Stripping Armor: Use proper tools to remove the steel or aramid layers without damaging the fiber. Protection: Place splices in splice trays or closures to prevent mechanical stress. Environmental Factors: For outdoor or direct-burial cables, armored pigtails provide extra protection against moisture, rodents, and physical impact.

Testing: After splicing, test for insertion loss and return loss to ensure network performance.

Summary

To connect armored optical cables to pigtails effectively: Use armored pigtails for added protection. Choose fusion splicing for permanent, low-loss connections; mechanical splicing is an alternative. Select the appropriate connector type for your equipment.

Protect the splice in a tray or closure and test the connection. This approach ensures durable, reliable, and low-loss connections suitable for harsh environments and long-term network performance.