WATER BLOCKED UNFILLED SINGLE TUBE CABLE

摘要

Disclosed is a dry single tube fiber optic cable of the loose tube variety i n which there is no filling or flooding materials but nonetheless adequate provision s are made to protect the optical fibers from damage due to water penetration. The cable structure comprises (1) one or more groups of optical fibers each held together by a circumscribing water absorbent material; (2) a buffering tube having an internal channel larger than the one or more groups of optical fibers in which the groups of optical fibers are moveably disposed; (3) a strength member circumscribing the buffering tube; (4) a water absorbent material circumscribing the strength member, and (5) a jacke t circumscribing the strength member.