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What are the different types of pigtail connections

Fiber and communications infrastructure knowledge brief Published 21 May 2024

Prepared for preliminary research by the ROGER FIBRE knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

Pigtail connections are classified based on connector type, fiber mode, core count, and polish type, with variations for single-mode, multimode, and bundled configurations.

Connector Type Classification

Pigtail connectors are categorized by the type of connector installed on the factory-terminated end, which determines compatibility and installation method: FC (Ferrule Connector): Threaded locking structure, ideal for fixed connections in telecom and datacom applications.

S

C (Subscriber Connector): Push-pull design, widely used for easy operation and high-density installations.

L

C (Lucent Connector): Compact size, suitable for high-density wiring and space-constrained environments.

S

T (Straight Tip): Bayonet design, allows quick installation and removal. Other types: Variants may include MPO/MTP for multi-fiber applications or specialized armored connectors for harsh environments.

Fiber Mode Classification

Pigtails are also classified by the type of optical fiber: Single-mode (OS1/OS2): Yellow outer sheath, designed for long-distance transmission with low loss, typically 1310nm or 1550nm wavelength. Multimode (OM1, OM2, OM3): Orange (OM1/OM2) or aquamarine (OM3) outer sheath, suitable for short-distance, high-bandwidth applications, typically 850nm wavelength.

Core Count and Bundling

Pigtails can be single-core or multi-core, depending on the number of fibers in the assembly: Single-core pigtail: One fiber, standard for most point-to-point connections. Dual-core or 4-core bundled pigtails: Multiple fibers in a single sheath for compact installations. 12-core or 12-color bundled pigtails: Common in high-density ODFs, allowing organized color-coded connections.

S

C, FC, LC, or ST bundled pigtails: Bundled by connector type for specific deployment needs.

Connector Polish Type

The performance of pigtail connections is influenced by the connector polish: PC (Physical Contact): Standard polish, reduces back reflection.

UP

C (Ultra Physical Contact): Enhanced polish for lower insertion loss and back reflection.

AP

C (Angled Physical Contact): Angled polish for minimal back reflection, often used in high-precision or long-distance applications.

Special Variants

Armored pigtails: Reinforced for tensile strength and abrasion resistance, suitable for outdoor or harsh environments. Ordinary pigtails: Standard pigtails for general fiber optic connections.

Summary

Pigtail connections are classified along multiple dimensions: Connector type: FC, SC, LC, ST, MPO/MTP. Fiber mode: Single-mode or multimode. Core count: Single, dual, 4-core, 12-core, or color-coded bundles.

Polish type: PC, UPC, APC. Special features: Armored or standard. This classification ensures proper selection for network deployment, optimizing performance, reliability, and installation efficiency in both telecom and data center environments.

What are the different types of pigtail connections - ROGER FIBRE ATELIER [PDF]

What are the different types of pigtail connections

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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