Optical waveguides – Optical transmission cable – Loose tube type
Patent
1992-06-29
1994-06-14
Bovernick, Rodney B.
Optical waveguides
Optical transmission cable
Loose tube type
G02B 644
Patent
active
053217888
ABSTRACT:
An optical fiber cable (20) includes provisions in a core thereof for preventing the flow of water longitudinally along the core and for preventing freezing of such water. The provisions for preventing freezing of water within the core, which could effect adversely the optical fibers, includes an antifreeze material. Each of two tapes may be impregnated with an antifreeze material such as propylene glycol, for example, and used to provide a laminate with a superabsorbent powder therebetween. Advantageously, the cable may have suitable flame retardance so that it may extend from an outside manhole to distribution points within a building.
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Arroyo Candido J.
Petisce James R.
Sheu Jim J.
AT&T Bell Laboratories
Bovernick Rodney B.
Hayes, Jr. Donald E.
Ngo John
Somers Edward W.
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