Multimode fiber optic cable FC-SC

A multimode fiber optic cable with FC connectors is designed for short- to medium-distance data transmission, featuring a larger core that supports multiple light modes and FC/PC or FC/APC terminations for reliable connections.

Overview

Multimode fiber (MMF) is an optical fiber type with a relatively large core diameter, typically 50–100 µm, allowing multiple light modes to propagate simultaneously. This design makes MMF ideal for short-distance communication, such as within buildings, data centers, or campus networks, supporting data rates up to 100 Gbps over distances of 300–550 meters depending on fiber type (OM3, OM4, OM5) and wavelength . MMF is cost-effective because it can use LEDs or VCSELs as light sources, which are less expensive than lasers used in single-mode fiber .

FC Connector

The FC (Ferrule Connector) is a threaded fiber optic connector that provides high mechanical stability and low insertion loss, making it suitable for laboratory, industrial, and telecom applications. FC connectors are available in PC (Physical Contact), UPC (Ultra Physical Contact), and APC (Angled Physical Contact) polishing types, which affect return loss and reflection performance . The ferrules are typically made of ceramic or stainless steel, and protective caps are used to prevent dust contamination .

Cable Types and Specifications

• Step-Index vs Graded-Index: Step-index MMF has a uniform core refractive index, while graded-index MMF gradually changes the refractive index to reduce modal dispersion, improving bandwidth over longer distances .
• Lengths: Common stock lengths include 1 m, 2 m, 3 m, and 5 m, with custom lengths available .
• Core Diameter and Numerical Aperture (NA): Typical MMF has a 50 µm core with 0.22 NA, suitable for standard multimode applications .
• Applications: Used for fiber optic patching, connecting network equipment, FTTH, telecom, and lab instrumentation .

Advantages

• Ease of alignment and installation due to larger core size.
• Lower cost for short-distance high-speed networks.
• Compatibility with a wide range of equipment and connector types.
• Durability with threaded FC connectors that resist vibration and movement.

Considerations

• Not suitable for long-distance transmission due to modal dispersion.
• High optical power can damage the epoxy in connectors; specialized fibers are recommended for high-power applications .
• Connector type and polishing affect signal reflection and insertion loss, so selection should match system requirements . In summary, multimode FC fiber optic cables are versatile, reliable, and cost-effective solutions for short- to medium-range optical communication, offering multiple connector and fiber options to suit various networking and laboratory applications .