FC fiber single-mode

FC-FC single-mode fiber patch cables are optical fibers with FC connectors on both ends, designed for precise alignment and minimal back reflection in single-mode networks.

Overview

FC-FC single-mode fibers are designed for long-distance, high-precision optical communication. They use a single-mode core (typically 9/125 µm), which allows only one propagation mode, reducing modal dispersion and enabling high-bandwidth transmission over long distances . The FC (Ferrule Connector) ensures stable, repeatable connections with a threaded coupling mechanism, making it ideal for laboratory, telecom, and industrial applications .

Connector Types

• FC/PC (Physical Contact): The fiber end-face is polished flat or slightly curved, providing low insertion loss but moderate back reflection (~40 dB) suitable for general applications .
• FC/APC (Angled Physical Contact): The ferrule tip is polished at an 8° angle, significantly reducing back reflection (~60 dB), which is critical for systems sensitive to reflections, such as interferometers or high-power laser setups .

Cable Construction

• Core/Cladding: Standard single-mode fiber has a 9 µm core and 125 µm cladding .
• Jacket Options: Common jackets include Ø3 mm PVC for durability or Ø900 µm Hytrel® furcation tubing for flexibility and compatibility with polarization controllers .
• Color Coding: Single-mode fibers are typically yellow for easy identification .

Applications

• Telecommunications: Long-distance data transmission with minimal signal loss.
• Laboratory and Test Equipment: High-precision optical measurements and interferometry.
• Fiber-to-Free-Space Coupling: AR-coated single-mode patch cables can improve performance in free-space optical setups .
• Industrial Networks: Reliable connections in harsh environments due to threaded FC connectors.

Additional Features

• Protective Caps: Included to prevent dust and damage to ferrule ends.
• Mating Sleeves: Used to connect FC to FC connectors, ensuring proper core alignment and minimizing back reflections .
• Custom Options: Lengths, connector types, and polish options can be customized for specific applications . FC-FC single-mode fibers are essential for high-performance optical systems where low loss, precise alignment, and minimal back reflection are critical. They are widely available from manufacturers like Thorlabs, PolyPhaser, and FS.COM, with options for both standard and AR-coated fibers .