Abstract: There is provided an optical fiber composite ground wire (OPGW). The optical fiber composite ground wire (OPGW) includes a central wire at the center of the optical fiber composite ground wire (OPGW), a steel tube disposed around the central wire, at least one optical fiber ribbon inserted into the steel tube and containing a plurality of optical fibers arranged in coplanar alignment, a filling material filled in the steel tube, at least one inner layer wire surrounding the central wire, and at least one outer layer wire surrounding the steel tube and the inner layer wire.

Abstract: An optical fiber composite ground wire includes a core having channels, loose tubes, each tube containing at least one ribbon optical fiber, and disposed in a respective channel, and external tensile wires surrounding the core. Since the optical fibers collected in the tube are the same in length, tension and breakage due to differences in length between the optical fibers can be prevented. Also, since ribbon optical fibers each having 2 to 8 cores are gathered in the loose tube, more than 12 cores can be assembled in the tube without special equipment. A UV-curable resin coating the outer surface of the ribbon optical fiber prevents water from permeating into the optical fibers and affecting optical characteristics.

Abstract: A composite overhead ground wire optical fiber cable of loose-tube type applying includes a first jelly paved on the circumference of the an optical fiber, for protecting the optical fiber against water; a plastics coating the circumference of the first jelly, for protecting the optical fiber against external shock; and a loose tube for inserting the optical fiber thereinto. An aluminum rod provides at least one groove for inserting the loose tube containing the optical fiber. A second jelly is paved between the loose tube and a surface of the groove, for fixing the loose tube therein and protecting it from water. A plurality of steel wires are externally provided around the circumference of the aluminum rod, for protecting the cable against tension stress and providing conductibility. The steel wires are aluminum coated, for protecting the steel wires against oxidation and corrosion.