The Fiber Channel (FC) connector utilizes a threaded coupling mechanism, making it ideal for environments with high mechanical stress: Threaded Body: Stainless steel for vibration resistance Ferrule: 2. What are the differences between them? Who is the most popular one? Find the answer in the article. Each type varies by shape, polish (APC, PC, or UPC), and return loss performance, which affect PC, UPC, and APC Polish Styles: What's the. A fiber optic connector is a mechanical device used to align and join optical fibers, enabling light to pass through with minimal loss. Unlike fiber splicing, which is permanent, connectors allow for easy connection and disconnection of cables, making them ideal for maintenance and flexibility in. The FC connector is a fiber-optic connector with a threaded body, which was designed for use in high-vibration environments. It is commonly used with both single-mode optical fiber and polarization-maintaining optical fiber. They directly affect insertion loss, return loss, reliability, and long-term network stability.