Fiber Optic Connectors

Types of Fiber Optic Connectors

Fiber optic connectors are crucial components in fiber optic networks, providing a secure and efficient way to join optical fibers. Each connector type has unique characteristics and is suited for specific applications. Here, we’ll discuss the most common types of fiber optic connectors: LC, SC, ST, FC, MT-RJ, and MPO.

LC (Lucent Connector)

  • Description: A small form-factor connector with a 1.25mm ferrule.

  • Construction: Features a push-pull design for easy insertion and removal.

  • Advantages:

    • Compact Size: Allows for high-density installations, making it ideal for data centers and high-density patch panels.

    • Performance: Low insertion loss and high precision alignment.

  • Applications: Commonly used in single-mode and multimode fiber applications, including data centers, telecommunication networks, and LANs.

SC (Subscriber Connector)

  • Description: A larger form-factor connector with a 2.5mm ferrule.

  • Construction: Uses a push-pull mechanism for quick and secure connections.

  • Advantages:

    • Simplicity: Easy to use and widely adopted, providing reliable performance.

    • Standardization: One of the most standardized connectors, ensuring compatibility across various equipment.

  • Applications: Suitable for single-mode and multimode fiber, used in data communications, CATV, and telecom networks.

ST (Straight Tip)

  • Description: A bayonet-style connector with a 2.5mm ferrule.

  • Construction: Features a twist-and-lock mechanism, providing secure connections.

  • Advantages:

    • Durability: Rugged design suitable for industrial environments.

    • Ease of Use: Simple twist-and-lock mechanism makes it easy to install and remove.

  • Applications: Often used in multimode networks, including LANs, campuses, and military applications.

FC (Ferrule Connector)

  • Description: A screw-on type connector with a 2.5mm ferrule.

  • Construction: Provides a secure, threaded connection to prevent signal loss.

  • Advantages:

    • Stability: Excellent mechanical stability and low insertion loss.

    • Reliability: Secure threaded connection makes it suitable for high-vibration environments.

  • Applications: Primarily used in single-mode fiber applications, such as in telecommunications and instrumentation.

MT-RJ (Mechanical Transfer Registered Jack)

  • Description: A duplex connector that integrates two fibers in a single ferrule.

  • Construction: Uses a push-pull mechanism and has a similar form factor to an RJ-45 connector.

  • Advantages:

    • Efficiency: High-density design allows for easy connections and terminations.

    • Alignment: Integrated pins for precise fiber alignment.

  • Applications: Commonly used in duplex fiber applications, such as in networking equipment and telecommunications.

MPO (Multi-Fiber Push On)

  • Description: A high-density, multi-fiber connector that can accommodate 12, 24, or more fibers in a single ferrule.

  • Construction: Uses a push-pull mechanism with alignment pins for precise mating.

  • Advantages:

    • High Density: Supports high-density connections, reducing space requirements.

    • Scalability: Ideal for high-speed data transmissions and expanding network capacities.

  • Applications: Widely used in data centers, high-performance computing networks, and telecom applications for parallel optics and multi-fiber connections.

Each type of fiber optic connector has its own advantages and is designed for specific applications. LC connectors are perfect for high-density installations, SC connectors are known for their simplicity and wide adoption, ST connectors are rugged and durable, FC connectors offer stability and reliability, MT-RJ connectors are efficient for duplex connections, and MPO connectors are ideal for high-density and scalable network solutions. Understanding these connectors' characteristics will help you choose the right one for your fiber optic network needs.