OPTICAL FIBER CORD AND RIBBON CORD USING THE SAME AND RIBBON CORD BRANCHING LINE

摘要

PROBLEM TO BE SOLVED: To obtain an optical fiber cord that has an extremely small diameter of ≤0.5 mm in finishing outside diameter and has sufficient mechanical strength, and a ribbon cord that allows the simultaneous removal of ribbon forming layers and coating layers including tensile strength members and the simultaneous fusion splicing to ordinary coated fiber ribbons when the ribbon cord is formed by using this optical fiber cord. ;SOLUTION: The optical fiber cord 5 is formed by placing ≥1 pieces of the tensile strength members 2, 2... longitudinally along the optical fibers 1 and coating and integrating the both with the coating layers 4. The cross section shape thereof is formed into a rectangular shape and the optical fiber cord is so formed that the parts, where the tensile strength member 2, 2, exist and the parts, where the tensile strength members not exit, exist to face each other in the coating layers 4. The ribbon cord 7 is formed by lining up plural pieces of such optical fiber cords 5 in such a manner that the parts not present with the tensile strength members are adjacent to each other and integral the optical fiber cords with the ribbon forming layer 6.;COPYRIGHT: (C)1999,JPO