Submarine, optical-fiber cable with optical fibers having tensil

Details Submarine, optical-fiber cable with optical fibers having tensil Submarine, optical-fiber cable with optical fibers having tensil

1994-01-26

1995-04-18

Bovernick, Rodney B.

Optical waveguides

Optical transmission cable

Loose tube type

385113, 385110, G02B 644

Patent

active

054085624

ABSTRACT:
A submarine, optical-fiber cable having a central metal wire, a slotted rod surrounding the wires, an absorbent sheath surrounding the slotted rod, a plurality of strength members helically wound around the absorbent sheath, a metal jacket surrounding the strength members, and a plastic sheath surrounding the metal jacket. The slotted rod includes peripheral helical slots, and each of the slots may receive at least one optical fiber or at least one optical ribbon. The optical ribbon includes at least two optical fibers. Each of the optical fibers has a tensile strain ranging from about 0.015 to 0.3% along its axis. The absorbent sheath includes a layer surrounding and contacting the slotted rod for absorbing water. The cable is suitable for operating in deep sea beds for a long period of time, for laying and recovering cables, and for quick repair. Modulated strain distribution in the optical fibers suppresses stimulated Brillouin scattering therein.

REFERENCES:
patent: 4389088 (1983-06-01), Trezequet
patent: 4401366 (1983-08-01), Hope
patent: 4671611 (1987-06-01), Allemand et al.
patent: 5013126 (1991-05-01), Hattori et al.
patent: 5179611 (1993-01-01), Umeda et al.
patent: 5222177 (1993-06-01), Chu et al.
Nobuyuki Yoshizawa & Tadatoshi Tanifuji, "Development of a 100-fiber submarine cable", Int'l Wire & Cable Symp. Proc. 1993.
Nobuyuki Yoshizawa & Tadatoshi Tanifuji, "Advanced submarine optical fiber Cable Technologies at NTT", S9 Cables, pp. 290-295; Mar. 1993.

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