The structure of the optical cable is to insert single-mode or multi-mode optical fibers into a loose tube made of high-modulus polyester material, and the tube is filled with a waterproof compound. The center of the cable core is a metal reinforced core. For optical cables with certain core numbers, a layer of polyethylene needs to be squeezed outside the metal reinforced core. The loose tube (and filler rope) is twisted around the central strengthening core into a compact circular cable core, and the gaps in the cable core are filled with water-blocking filler. The plastic-coated aluminum strip is wrapped longitudinally and then extruded into a polyethylene sheath to form a cable.
GYTA layered optical cable