Special Application Optical Cable Models

Special application optical cables are designed with unique structures and materials to meet the demands of harsh or specialized environments, including hybrid, armored, underwater, flame-retardant, anti-rodent, and air-blown micro cables.

Key Types and Applications

1. Hybrid Fiber Optic Cables Hybrid cables integrate optical fibers and insulated copper conductors in a single cable, allowing simultaneous signal transmission and power supply. They are commonly used in distributed base stations, connecting BBU and RRU in DC remote supply systems, typically operating at DC 380V. Hybrid cables can be installed overhead or in pipelines, providing flexibility for remote communication setups and power delivery . 2. Armored and Anti-Rodent Cables

• Steel Wire Armored (SWA) and Corrugated Steel Tape (CST) cables provide mechanical protection against rodents, termites, birds, and environmental hazards.
• Anti-rat bite cables use stainless steel armor to resist chewing and corrosion, suitable for farmland, forests, and outdoor installations.
• These cables are often directly buried, duct-laid, or aerially installed . 3. Underwater and Harsh Environment Cables
• Underwater fiber optic cables are designed with high mechanical strength and waterproofing, suitable for submarine, river, or lake installations.
• Spiral steel tube armored cables are used in vibration-sensitive sensor systems, offering tensile, compressive, torsional, and waterproof protection, ideal for airports, power plants, chemical industries, and military applications . 4. Flame-Retardant and Mining Cables
• Flame-retardant direct-buried cables slow the spread of fire and are used in mines or industrial environments.
• Mining fiber cables require anti-rodent and flame-retardant properties to withstand harsh underground conditions . 5. Air-Blown Micro Fiber Cables
• These non-metallic, lightweight cables are designed for FTTH networks, allowing installation via air-blowing in microducts.
• They are flexible, easy to install, and suitable for feeder sections connecting optical branch points to user access points .

Structural and Material Considerations

Special optical cables often feature:

• Loose tube or tight-buffered fiber cores for flexibility and protection.
• Reinforcement materials such as metal, non-metal, or heavy metal to improve tensile strength and mechanical durability.
• Water-blocking compounds and flame-retardant sheaths to enhance environmental resistance.
• Non-metallic designs for areas with strong electromagnetic interference or frequent thunderstorms .

Summary

Special application optical cables are engineered to meet specific environmental and operational challenges, including mechanical stress, fire hazards, rodent damage, underwater conditions, and power integration. Choosing the right model depends on the installation environment, required protection, and functional requirements, ensuring reliable signal transmission and long-term durability.