Optical fiber cable having truncated triangular profile tubes

Details Optical fiber cable having truncated triangular profile tubes Optical fiber cable having truncated triangular profile tubes

1995-07-25

1997-07-15

Bovernick, Rodney B.

Optical waveguides

Optical transmission cable

Loose tube type

385 66, 385 84, 385112, G02B 644

Patent

active

056490437

ABSTRACT:
An optical fiber cable includes a central strength member 11 surrounded by a plurality of optical fiber containing tubes 20, the central strength member and tubes being encircled by a sheath 35. The optical fiber containing tubes have a generally frustum or truncated isosceles triangular shaped profile with the base 22 of the triangular shape having a curvature corresponding to the inside surface of the cable sheath and a top 24 (truncated edge or corner) of the triangle opposite and generally parallel to the base having a curvature corresponding to the outside diameter of the central strength member, the plurality of tubes being positioned adjacent to one another in a pie shape to thereby form a central channel within the cable for the central strength member. The truncated isosceles triangular shape of the tubes have a larger cross-sectional area within the tubes for carrying optical fiber cables. Additionally, the shape of the tubes provides improved resistance to compression of the cable. Also, for a given number of optical fibers contained within the cable, the present invention provides an improved strain window as compared to prior art optical cables.

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