Hollow-Core Optical Fiber
Hollow FRP reinforcing core is a fiber material and resin-based product formed through a pultrusion process, where the composite material is cured by light and heat using a pultrusion die. Through a specialized manufacturing process, a precisely sized circular hole is formed at the center of the reinforcing core, into which optical fibers are inserted, allowing them to move freely.
It integrates the traditional double-layer composite structure of optical cables, consisting of a "solid FRP reinforcing core + PBT loose tube," into a single-layer integrated structure of a "hollow FRP tube." It can withstand mechanical stresses such as tension, compression, lateral pressure, and bending, while also replacing the PBT loose tube to provide space for optical fiber movement and buffering. It offers multiple core advantages, including structural integration, lightweight corrosion resistance, immunity to electromagnetic interference, and optical fiber stress isolation.
Compared to the structure of fiber optic cable and loose tube, hollow FRP fiber optic cable has the following advantages:
Mechanical performance: The ability to resist tension, impact, and bending has been significantly improved.
Stable transmission: Stress dispersion isolation reduces signal transmission loss by about 40%.
Environment adaptation: resistant to hydrolysis, corrosion, aging and lightning strike, suitable for long-term stable operation in any harsh and complex environment.
Integrated lightweight: The overall diameter of the optical cable is reduced by 15% -20%, and the weight is reduced by 30% -40%.
Process simplification: The production process is simple and can also be directly cabled as needed
Power communication scenario: replacing ADSS optical cables, near high-voltage transmission lines and substation areas, resistant to electromagnetic interference and lightning strikes.
Installation in complex environments: coastal areas, saline alkali land, plateaus, high-risk areas for lightning strikes, corrosion-resistant, and lightning resistant.
Urban underground pipelines: In areas with scarce pipeline resources, miniaturization and lightweighting are necessary to increase the laying density and improve the utilization rate of pipeline resources.
Intelligent communication sensing: integrating distributed fiber optic sensing units to achieve a composite function of "transmission+intelligent monitoring".