TIGHT BUFFER OPTICAL CABLE FOR BEING USED INDOORS AND OUTDOORS

摘要

A tight buffer optical cable for being used indoors and outdoors is provided to the posture of an optical fiber unit firmly by filing aramid yarn or the water-proof yarn between the optical fiber unit and a core. A core(110) comprises a coating layer(114) coated on a exterior surface of a central line and the central line(112) extended along the longitudinal direction of an optical cable(100). An optical fiber unit(130) is composed of the optical fiber(132) positioned at the center of the optical fiber and a tight buffer(134) covering the optical fiber. The optical fiber unit is formed by a plurality of optical fibers and is positioned in order to be adjacent to each other along the circumference of the central line.