Patent ID: 8488929

Claim:
A fiber optic cable, comprising: a polymer jacket enclosing a cavity and having an outside diameter of the jacket in the range of 6.0-8.0 mm; at least six optical fibers enclosed within the cavity, wherein the optical fibers are multimode optical fibers comprising a glass core and glass cladding, wherein the cladding comprises an inner annular portion, a depressed-index annular portion, and an outer annular portion, and wherein the multicore optical fibers exhibit a spectral attenuation of less than 2.5 dB/km at 850 nm and less than 0.8 dB/km at 1300 nm; and a tensile yarn strain relief element in the cavity and contacting the polymer jacket, the optical fibers contacting the strain relief element, wherein the tensile yarn strain relief element is formed from aramid or polyester tensile yarn, wherein the tensile yarn strain relief element is tightly packed around the optical fibers, and wherein some of the tensile yarn strain relief element is bonded to the polymer jacket; wherein when the cable is subjected to a tensile load of 300 lbs, each optical fiber experiences a delta attenuation of less than 0.2 dB at optical wavelengths of 850 nm and 1300 nm.