Patent
1986-02-20
1988-02-16
LaRoche, Eugene R.
170 70R, G02B 644
Patent
active
047251212
ABSTRACT:
A submarine cable with optical fibers which prevents damage to the fibers due to water pressure without the use of an external armor. The cable has a central core with a strand which provides the cable tensile strength and which is surrounded and contacted by a layer of plastic material which has helical grooves which receive the optical fibers which may have a protective covering. The layer of plastic material is surrounded by sheath in the form of a layer of plastic material. The grooves and any spaces radially inwardly of the sheath, such as the spaces between the wires of the strands, are filled with a substantially incompressible fluid, such as a grease or jelly. If the optical fiber protective layer is a tube loosely receiving the optical fiber, or optical fibers, the space within the tube not filled by optical fibers is filled with a substantially incompressible fluid. The layer of plastic material forming the sheath may at least partially extend into the grooves.
REFERENCES:
patent: 4361381 (1982-11-01), Williams
patent: 4381140 (1983-04-01), van der Hoek et al.
patent: 4389088 (1983-06-01), Trezequet
patent: 4408828 (1983-10-01), Le Hoane et al.
patent: 4422889 (1983-12-01), Trezequet et al.
patent: 4491386 (1985-01-01), Negishi et al.
patent: 4623218 (1986-11-01), Laurette et al.
LaRoche Eugene R.
Lee James C.
Societa Cavi Pirelli S.p.A.
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