Optical waveguides – Optical transmission cable – Loose tube type
Patent
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.
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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.
Imai Takeshi
Ishino Yasuo
Mochizuki Akira
Nemoto Kazumasa
Tanifuji Tadatoshi
Bovernick Rodney B.
Ngo John
Nippon Telegraph and Telephone Corporation
Ocean Cable Co., Ltd.
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