-- Components of Duct Cable:
Optical Fiber: A glass fiber as thin as a human hair that transmits light.
Protective Coating and Jacket: Protects the optical fiber and enhances the cable's strength. Conduit: A plastic tubing system typically used to house and protect the optical fiber.
How Duct Cable Works:
A bundle of optical fibers is placed in a pre-laid underground or protected conduit. The cable itself uses light pulses to transmit data within the glass fiber. Total internal reflection (TIR) causes the light signal to reflect off the fiber's walls, enabling long-distance, high-bandwidth data transmission. Within conduits, fiber optic cables are laid using methods such as pulling or air blowing.
-1. Data Transmission: Unlike traditional copper cables, which transmit information via electrical pulses, optical cables transmit light pulses.
-2. Total Internal Reflection: Light signals travel within glass fibers thinner than a human hair, undergoing multiple TORs on the fiber's inner walls as they propagate along the fiber, minimizing energy loss.
-3. Conduit Protection: The cable is laid within a pre-laid underground conduit, providing protection from harsh environments and enhancing safety.
--Conduit Installation Methods:
Pull-in Method: Suitable for short-distance (200-300 meters) network access. The optical cable can be manually or mechanically pulled into the conduit.
Air-blowing Method: Suitable for long-distance installation. The optical cable is blown into the conduit using a high-speed airflow or a combination of airflow and push-pull.
-Main Functions:
Protection: Conduits effectively protect the optical cable from environmental damage, ensuring reliable communication.
Easy Installation: Conduits provide a convenient channel, making optical cable installation more convenient, especially in urban areas and for long-distance communications.