Optical waveguides – Optical transmission cable – Tightly confined
Patent
1991-02-01
1992-04-28
Ullah, Akm
Optical waveguides
Optical transmission cable
Tightly confined
385109, G02B 514
Patent
active
051094576
ABSTRACT:
A totally dielectric cable includes a core (21) comprising a plurality of optical fiber transmission media (24--24). The core is enclosed by a core tube (34) which is made of a plastic material and water blocking provisions are provided within the core tube for preventing the longitudinal migration of water. A water blocking tape (44) may be provided in engagement with an outer surface of the core tube and a plastic jacket is extruded thereover. Interposed between the outer surface of the jacket and the core tube are two diametrically opposed pluralities (60--60) of strength members each of which may be made of glass fibers. At least one strength member (62) of each plurality is rod-like to provide compressive as well as tensile strength for the cable. The remaining strength members of each plurality are relatively flexible rovings (64--64) which supplement the tensile strength of the rod-like members. The strength members are disposed and have a stiffness modulus which are effective to minimize any tensile strain which is imparted to the rovings.
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Panuska Andrew J.
Patel Parbhubhai D.
Santana Manuel R.
Vedejs Arthur G.
AT&T Bell Laboratories
Somers E. W.
Ullah Akm
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