Fiber Optic Pigtails: Tiny Components, Mighty Connections Leave a comment

Fiber optic networks rely on fiber optic pigtails to ensure efficient and reliable signal transmission.
Fiber optic pigtails are essential for connecting fiber optic cables to devices and systems. They help maintain high-speed, low-latency communication across telecommunication and data networks. Understanding their function is crucial for network engineers, technicians, and others working in optical fiber technology.

What is a Fiber Optic Pigtail?

A fiber pigtail refers to a special fiber optic cable that contains a connector at one end and bare optical fiber at the other end. The end equipped with a fiber connector is intended for connection to optical devices and the end with a bare fiber is typically spliced with other fiber optic cables. This design provides convenience for fiber optic networks, particularly for field termination applications, to enhance network performance and reliability.

Types of Fiber Pigtail Connectors

Based on the fiber connector type, we can divide the fiber pigtails into:

• LC Fiber Pigtail: LC connectors are compact form factor fiber connectors for high-density connections. They are a 50% smaller version of the older SC fiber connector and have a square plastic enclosure with a 1.25mm ceramic ferrule. The LC connector pre-assembles the LC fiber pigtails. It is one of the most common types. 
• SC Fiber Pigtail: A non-optical disconnect connector with a 2.5mm pre-radiused zirconia or stainless alloy ferrule, the SC pigtail cable connector is cost-effective for usage in FTTX, CATV, LAN, WAN, test, and measurement applications.
• FC Fiber Pigtail: FC fiber pigtail takes the advantage of the metallic body of FC optical connectors, featuring the screw type structure and high precision ceramic ferrules. FC pigtail patch cords and its related products are widely applied for general applications.
• ST Pigtail: ST stands for Straight Tip.The pigtail is similar to the FC pigtail but without screw thread. ST refers to a fiber optic connector commonly used in the fiber splice tray. Durability and resistance to damage also make it widely used in outdoor applications.

By Application Environment

• Indoor Fiber Pigtail: As the name suggests, indoor fiber pigtail is only suitable for indoor wiring. It has no extra protection but is enough for indoor use. The low cost and good flexibility make this pigtail the most commonly used type.
• Armored Fiber Pigtail: Featuring an additional protective metal layer, the armored fiber pigtail boasts better durability and provides robust shielding from common external damage. It is suitable for harsh environments, providing added protection.
• Waterproof Pigtail: designed with a stainless steel strengthened waterproof unit and armored outdoor PE (Poly Ethylene) jacket, waterproof fiber pigtail is a great fit in harsh environments, like communication towers, CATV and military. Waterproof pigtail cable boosts good toughness, tensile and reliable performance, facilitating the use of outdoor connections.

By Fiber Type

Generally, fiber optic pigtails are classified as multimode and single-mode fiber. 

• Designers create single-mode fiber optic pigtails for long-distance communication, directing light to travel through the fiber core in a single path. Network operators typically use these pigtails for applications that require high bandwidth and long-range data transmission, such as telecommunications and large enterprise networks.
• Multimode pigtails are made with 62.5/125μm or 50/125μm bulk multimode fiber cables and terminated with multimode connectors. However, if we want to classify them in more detail, we can divide them into OM1, OM2, OM3, OM4, and OM5 pigtails.  

By Polish Type

The polish type categorizes fiber pigtails into PC, UPC, and APC pigtails. PC, UPC, and APC are related to single-mode and multimode fibers. Different polished interfaces of connectors can impact the return loss of fiber connectors.

1. PC Fiber Pigtail: The PC fiber pigtail uses a physical contact connector. Most multimode fiber pigtails use PC connectors, but UPC pigtails are gradually replacing them.
2. UPC Fiber Pigtail: It stands for ultra-physical contact connectors with a slightly domed end face. People regard it as the most common type for single-mode and multi-mode pigtails.
3. APC Fiber Pigtail: APC stands for “Angled physical contact”. This design reduces back reflection even further by polishing the connectors’ ferrule end faces at an 8-degree angle. Technicians commonly use APC fiber pigtails in CATV, FTTx, and other WDM systems.

Advantages of Fiber Optic Pigtails

• Ease of installation: Pigtails are easy to install and can be used to connect devices quickly and easily.
• Versatility: Pigtails are available in a variety of connector types and lengths, making them suitable for a wide range of applications.
• Low cost: Pigtails are less costly than full-length fiber optic cables.
• Reduced Risk of Contamination: Using fiber optic pigtails with pre-attached connectors minimizes the risk of fiber contamination during installation.
• Durability: Pigtails are made from high-quality materials and are designed to withstand harsh environments.
• Improved performance: The factory-terminated pigtail ensures high-speed and reliable signal transmission.

Application of fiber optic pigtails

Telecommunications

Telecom operators use fiber optic pigtails to connect fiber optic cables to their transmission systems, ensuring high-speed communication between cities, regions, and countries.

Data Centers

With its high bandwidth, low latency, and high security, fiber pigtails can process massive data in data centers. 

With the increasing demand for high bandwidth and speed applications, fiber optic cables have been commonly used in many scenarios. The demand also drives the development of fiber pigtails in broader applications, including the Internet of Things (IoT), smart cities, environment sensing, health monitoring, and industrial automation.

Fiber Optic Networks

Fiber optic pigtails are a crucial component in fiber optic networks. Simple wiring makes it easier to install than direct cables. Optical devices like optical transceivers and optical splitters often rely on fiber pigtails. Additionally, technicians can use fiber pigtails to connect devices to the network for regular tests and maintenance of fiber optic networks.

Conclusion

Fiber optic pigtails are indispensable components in the design and maintenance of fiber optic networks. They provide a quick and efficient means of terminating, splicing, and connecting fiber optic cables, ensuring minimal signal loss and maximum network performance. Whether used in telecommunications, data centers, or enterprise networks, fiber optic pigtails are essential for maintaining high-quality, high-speed communication systems. Understanding the role and benefits of fiber optic pigtails can help network professionals optimize their fiber optic installations and ensure the longevity and reliability of their networks.

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