Classification Table of Optical Cables for Broadcasting and Telecommunications

Optical cables are classified by mode of propagation, refractive index profile, material, and application, with single-mode and multimode fibers being the primary categories.

1. Classification by Mode of Propagation

• Single-Mode Fiber (SMF): Transmits a single light ray, ideal for long-distance communication such as telecommunication networks and internet backbones. It has a thin core of about 8–10 micrometers, minimizing signal dispersion and allowing high-speed, long-range transmission .
• Multimode Fiber (MMF): Carries multiple light rays simultaneously, suitable for short-distance communication like LANs. The core is larger, typically 50–62.5 micrometers, which allows multiple modes but results in higher dispersion and shorter transmission distances . Multimode fibers are further divided into OM1, OM2, OM3, OM4, and OM5, with increasing bandwidth and distance capabilities .

2. Classification by Refractive Index Profile

• Step-Index Fiber: Core has a uniform refractive index with a sharp boundary to the cladding. It is simple and cost-effective but has higher signal dispersion, suitable for low-cost or short-range systems .
• Graded-Index Fiber: Core refractive index gradually decreases from the center to the edge, reducing modal dispersion and improving signal clarity. It is suitable for medium-range communication .

3. Classification by Material

• Glass (Silica) Fiber: Offers high optical clarity, low signal loss, and is widely used in high-speed networks, telecommunications, and broadcasting .
• Plastic Optical Fiber (POF): More flexible and cheaper than glass fibers, commonly used for decorative lighting, short-range communication, and some consumer applications .

4. Classification by Application

• Telecommunication and Internet Cables: Designed for long-distance, high-bandwidth data transmission.
• Cable TV and Broadcasting: Optimized for signal quality and reliability over medium distances.
• Local Area Networks (LANs): Typically use multimode fibers for short-range, high-speed connections .

5. Classification by Fiber Count and Configuration

• Simplex Fiber Cable: Contains a single fiber strand, used for one-way transmission or bidirectional transceivers (BiDi) over a single fiber .
• Duplex Fiber Cable: Includes two fiber strands, one for transmitting and one for receiving, standard for full-duplex communication and point-to-point links . These classifications help engineers and network designers select the appropriate optical cable type based on distance, bandwidth, environment, and application requirements, ensuring optimal performance in broadcasting and telecommunications networks.