Patent ID: 8855455
Filing Date: 2014-10-07
Classification: G02B

Abstract:
1. An optical fiber cable comprising: a plurality of fiber optic elements, said fiber optic elements including a glass portion and a UV optical coating portion; a plurality of buffer tubes, each having a defined wall thickness and containing one or more of said plurality of optical fibers, said buffer tube being made of a fire retardant polymer; and a jacket, having a defined wall thickness, surrounding said buffer tubes, said jacket being made of a fire retardant polymer, wherein said fire retardant polymers for said plurality of buffer tubes and for said jacket are selected from a defined ratio of PVDF (PolyVinyliDene Fluoride) and FRPVC (Fire Resistance Poly Vinyl Chloride) and wherein said defined wall thickness of said buffer tubes, said defined wall thickness of said jacket and said defined ratio of PVDF to FRPVC, and wherein a ratio of total polymer to UV optical coating of said fiber optic elements, by area, is substantially in the range of 5:1 to 9:1 such that said cable meets the NFPA 262 Plenum (UL 910 Test) fire/smoke test standards.