Cold connector for yellow and black fiber optic cables

Use a field-installable SC/UPC or SC/APC cold connector to terminate yellow (single-mode) and black (multimode) fiber optic cables without fusion splicing.

What is a Cold Connector

A cold connector, also known as a mechanical splice or fiber fast connector, allows you to terminate fiber optic cables in the field without a fusion splicer. It aligns the bare fiber with a short fiber stub inside the connector using index-matching gel or mechanical clamping, enabling optical signal transmission quickly and reliably . Cold connectors are ideal for small-scale deployments, emergency repairs, or FTTH (Fiber to the Home) installations.

Connector Types and Compatibility

• SC/UPC Cold Connector: Uses Ultra Physical Contact (UPC) polish, providing a return loss ≥50 dB. Suitable for general single-mode links, including telecom and backbone networks .
• SC/APC Cold Connector: Uses an 8-degree angled polish (APC), delivering return loss ≥60 dB. This is preferred for GPON, EPON, and CATV networks where low back reflection is critical .
• Color Coding: The connector housing color typically matches the polish type: blue for UPC and green for APC. This helps maintain consistency with fiber color coding standards .

Fiber Color Considerations

• Yellow Jacket: Indicates single-mode fiber (OS1/OS2), commonly used for long-distance communication .
• Black Jacket: Often used for multimode or specialty fibers, depending on manufacturer and application .
• When terminating fibers of different colors, ensure the connector type matches the fiber's mode and polish type to avoid signal loss or incompatibility.

Installation and Performance

• Cold connectors are field-installable, requiring minimal tools.
• They are faster and more cost-effective than fusion splicing for small deployments.
• Proper alignment and polishing are critical to maintain low insertion loss and high return loss.
• Ideal for patching within distribution boxes, customer premises, or emergency restoration .

Summary

For yellow single-mode and black multimode fibers, select a high-quality SC/UPC or SC/APC cold connector based on the network requirements. Ensure the connector matches the fiber type, polish, and color coding standards to maintain optical performance and network reliability .