Composite buffer optical fiber cables
First Claim
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1. A composite buffer cable comprising:
- (a) a single optical waveguide fiber having an outer coating, said outer coating having a diameter D1 ;
(b) a first layer of fill compound surrounding the optical waveguide fiber;
(c) a second layer of aramid fiber surrounding and in contact with the fill compound, said second layer having an inner diameter D2 which is less than about twice D1 ; and
(d) a plastic jacket surrounding the layer of aramid fiber.
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Abstract
Single fiber cables of the composite buffer type are provided which include: (a) a central optical waveguide fiber; (b) a layer of fill compound surrounding the optical fiber; (c) a layer of aramid fiber surrounding the fill compound; and (d) a plastic jacket surrounding the layer of aramid fiber. Multi-fiber cables are also provided which include: (a) a plurality of optical waveguide fibers; (b) a layer of aramid fiber surrounding the optical fibers; (c) fill compound in contact with the inner surface of the layer of aramid fiber and with the optical fibers; and (d) a plastic jacket surround the layer of aramid fiber. Methods for producing cables of these types are disclosed.
313 Citations
24 Claims
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1. A composite buffer cable comprising:
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(a) a single optical waveguide fiber having an outer coating, said outer coating having a diameter D1 ; (b) a first layer of fill compound surrounding the optical waveguide fiber; (c) a second layer of aramid fiber surrounding and in contact with the fill compound, said second layer having an inner diameter D2 which is less than about twice D1 ; and (d) a plastic jacket surrounding the layer of aramid fiber. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A multifiber cable having a longitudinal axis which comprises:
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(a) a plurality of optical waveguide fibers, each said fiber including an outer coating having a diameter of less than or equal to about 250 μ
m, the combined cross-sectional areas of the fibers being A1 ;(b) a layer of aramid fiber surrounding the plurality of optical waveguide fibers, said layer having an inner surface and said inner surface having a cross-sectional area in a direction orthogonal to the longitudinal axis of A2, the ratio of A1 to A2 being at least about 0.4; (c) fill compound in contact with the inner surface of the layer of aramid fiber and with the optical waveguide fibers, said fill compound substantially filling the space between the optical waveguide fibers and the inner surface of the layer of aramid fiber; and (d) a plastic jacket surrounding the layer of aramid fiber. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method for preparing a composite buffer cable comprising:
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(a) providing an optical waveguide fiber; (b) coating the optical waveguide fiber with a layer of fill compound; (c) applying aramid fibers to tee layer of fill compound; and (d) coating the structure resulting from step (c) with a plastic material. - View Dependent Claims (16, 17, 18)
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19. A method for preparing a multi-fiber cable comprising:
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(a) providing an optical waveguide fiber; (b) coating the optical waveguide fiber with a first layer of fill compound; (c) applying a plurality of optical waveguide fibers to the first layer of fill compound; (d) coating the structure resulting from step (c) with a second layer of fill compound; (e) applying aramid fibers to the second layer of fill compound; and (f) coating the structure resulting from step (e) with a plastic material. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification