Patent ID: 6229944
Filing Date: 2001-05-08
Classification: G02B

Abstract:
An optical fiber cable comprising:a plurality of optical fiber ribbon successively stacked to form an optical fiber ribbon stack;cushioning fillers made of stack of strings or yarns and disposed so as to surround said optical fiber ribbon stack; andan outer tube forming a cylindrical inner space so as to surround said cushioning fillers,wherein a space factor S of said cushioning fillers in a remaining space after removal of said optical fiber ribbon stack from said inner space of said outer tube is set to be in a range of 10% to 60% when the space factor S is given by the following expression:S={B/(.pi.r.sup.2 -A)}.times.100in which A is a total sectional area of said optical fiber ribbon stack, r is the inner radius of said tube, and B is a total sectional area of the cushioning fillers and given by the following expression:B=(denier value.times.total amount of the cushioning fillers)/(9000.times.specific gravity of the cushioning fillers).