Fiber optic cable specifications fc

FC connectors are threaded fiber optic connectors designed for high-precision, low-loss, and vibration-resistant applications, typically using a 2.5 mm ceramic ferrule.Mechanical and Structural Features

FC connectors feature a threaded coupling mechanism that prevents accidental disconnection and ensures stability in high-vibration environments, making them suitable for telecom, industrial, and measurement applications . The ferrule, typically 2.5 mm in diameter, is made of zirconia ceramic or stainless steel, and the fiber end is polished to a physical contact (PC) surface, with variants including FC/PC, FC/SPC, and FC/UPC for increasing polish quality and lower back-reflection . Some connectors, like Radiall's FC, allow tuning in six positions to optimize insertion loss by rotating the ferrule to align fiber cores precisely .

Optical Performance

FC connectors are designed for low insertion loss and high return loss, with typical maximum insertion loss around 0.3–0.5 dB depending on polish type and fiber quality . The spring-loaded ferrule ensures consistent contact force, reducing signal degradation. Advanced designs, such as Diamond SA's Active Core Alignment (ACA) technology, minimize core eccentricity for superior optical alignment .

Standards and Compliance

FC connectors comply with IEC 61754-13 and JIS C 5970 (type F01) standards, and intermateability has been certified by NTT and other organizations . They are compatible with single-mode (SM), multimode (MM), polarization-maintaining (PM), and specialty fibers including VIS/NIR and high-temperature types .

Environmental and Reliability Specifications

FC connectors are engineered to withstand vibration, shock, and tensile stress. For example, insertion loss fluctuation under vibration (10–55 Hz, 0.75 mm amplitude) or shock (981 m/s², 6 ms half-sine pulse) is typically ≤0.2 dB, with no visible damage to the connector or cable . Crimping reliability is enhanced with protective metallic tubes to reduce fiber stress and ensure excellent cable retention .

Applications

FC connectors are ideal for high-precision or high-vibration environments, including:

• Telecommunications and CATV networks
• LAN, MAN, and WAN systems
• Test and measurement equipment
• Industrial and medical optical systems
• Single-mode lasers and polarization-maintaining fiber setups

Assembly and Accessories

FC connectors are available as terminated assemblies, field termination kits, or splice-on connectors. Accessories include straight boots, dust caps, and crimping sleeves, with some “level 0” kits allowing user customization . Proper assembly and handling are critical to maintain optical performance and longevity. In summary, FC connectors provide robust, precise, and low-loss fiber connections, particularly suited for demanding optical systems where vibration resistance and high alignment accuracy are essential.