The basic optical units of network cabling fiber optic cables primarily include the following types:
Tight-Buffered Fiber: Tight-Buffered Fiber is a compact type of fiber optic cable characterized by a tightly applied jacket material, such as nylon 12, directly over the cladding of the fiber. This design significantly enhances the fiber's mechanical strength and protection, mitigating stress effects during bending, stretching, or temperature variations, thereby ensuring stable optical signal transmission. Tight-Buffered Fiber is widely used in indoor cables, data centers, backbone networks, and other scenarios requiring high reliability and stability.
Primary Coated Fiber: Primary Coated Fiber features a single protective coating layer applied directly to the fiber surface, typically made of materials such as UV-cured acrylic resin. This coating layer effectively shields the fiber surface from wear, contamination, and mechanical damage while maintaining its physical, mechanical, and optical properties. The smaller diameter of Primary Coated Fiber facilitates the accommodation of more fibers within a cable, thereby enhancing transmission capacity.
Loose Tube Fiber: Loose Tube Fiber employs a loose tube structure that encloses the fiber within a high-modulus material tube, filled with a gel compound for protection. This type of cable is suitable for outdoor environments, including aerial, duct, and direct burial applications. The gel inside the loose tube helps prevent moisture ingress, enhancing the cable's reliability in harsh, high-humidity conditions.
Fiber Ribbon: Fiber Ribbon consists of multiple fibers arranged in parallel and consolidated into a thin and flat strip, typically containing 4 to 24 fibers. Fiber Ribbon cables offer compactness, ease of management and maintenance, making them prevalent in cable systems with a high fiber count. Fiber Ribbons utilize color coding and identification systems for rapid fiber recognition and localization, enhancing the efficiency of fiber connection and assembly.
In summary, Tight-Buffered Fiber, Primary Coated Fiber, Loose Tube Fiber and Fiber Ribbon are common basic optical unit types found in network cabling fiber optic cables. Each possesses unique structural characteristics and advantages, suitable for diverse application scenarios and cabling requirements. When designing and selecting fiber optic cables, it is crucial to choose the appropriate optical unit type based on actual needs and environmental conditions to ensure the stability and reliability of the fiber communication system.