OPTICAL FIBER CORE AND CABLE WITH REINFORCED BUFFER TUBE LOOSELY ENCLOSING OPTICAL FIBERS

摘要

Optical fiber core including a plastic buffer tube loosely containing individual optical fibers or a plurality of coplanar fibers in a plastic ribbon, which fibers and ribbon are longer than the buffer tube, at least two flexible strength members of a tensile strength greater than the tensile strength of the tube and havring a coefficient of expansion and contraction less than that of the tube, at the outer surface of the the and an adhesive binding the strength members to the tube or a tape or cord under tension around the strength members to prevent slippage of the strength members with respect to the tube and to prevent buckling of the strenght member when the core is subject to compressive forces. Also, an optical fiber cable containing such core .