Fiber unit for optical submarine cable

Abstract

Abstract PURPOSE:To obtain an optical fiber unit structure which can be manufactured continuously and easily, causes no water-run, and also is excellent in its handling property by constituting it so that one center supporting body and plural optical fiber core wires are embedded so as to make the whole surface contact to an ultraviolet hardening type resin. CONSTITUTION:The periphery of an optical fiber 1 is covered with a UV urethane resin layer 20 first, its periphery is covered with a UV epoxy resin layer 21, and also its periphery is covered with a thermoplastic resin layer 22 such as nylon, heitler, etc., and a core wire is formed thereby. Subsequently, a unit structure is formed by covering in advance the periphery of a center supporting body 8 of the same diameter as that of this core wire with a UV urethane resin layer 23, twisting together six core wires and collecting and placing them in its periphery, and packing its gap and periphery with a UV urethane resin 24 as a unit filling material. In such a way, by forming the unit filling material 24 and the covering 23 of the center supporting body 8 by the UV urethane resin of the same material, the resin layers 23, 24 are formed as one body, and the fiber core wire is embedded completely in the filling material 24.

Inventors

• 👤 Yoshihiko Yamazaki
• 👤 山崎　吉彦
• 👤 Hitoshi Yamamoto
• 👤 均 山本
• 👤 Yasuhiko Niino
• 👤 新納　康彦

Bibliographic Details