All dielectric self-supporting fiber optic cable
AssigneeSuperior Essex International LP
InventorChristopher Robert Evans
Life of this patent
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Abstract
An all-dielectric self-supporting (ADSS) cable may include a central strength member and a plurality of buffer tubes helically wrapped around the central member. Each of the plurality of buffer tubes may house at least one optical fiber, and an outer jacket may surround the plurality of buffer tubes and the central strength member. Additionally the central strength member may include a plurality of different strength layers including a first layer formed from relatively flexible material and a second layer formed from relatively rigid material.
Claims20
An all-dielectric self-supporting (ADSS) cable, comprising:
- a central strength member comprising:
- a first layer having a flexural modulus greater than 500 MPa:
- and
- a second layer comprising a plurality of strength yarns helically twisted around the first layer, the second layer having a flexural modulus less than 10 MPa and an elastic modulus greater than 600 MPa;
- a plurality of buffer tubes helically wrapped around the central strength member, each of the plurality of buffer tubes housing at least one optical fiber;
- and
- an outer jacket surrounding the plurality of buffer tubes and the central strength member.
An all-dielectric self-supporting (ADSS) cable, comprising:
- a central strength member comprising:
- a first layer comprising a rigid material having a flexural modulus greater than 500 MPa;
- and
- a second layer comprising a plurality of strength yarns helically twisted around the first layer, the second layer having a flexural modulus less than 10 MPa, the plurality of strength yarns comprising at least one of (i) aramid yarn, (ii) basalt fiber, (iii) ultra-high molecular weight polyethylene, or (iv) fiberglass;
- a plurality of buffer tubes helically wrapped around the central strength fiber, each of the plurality of buffer tubes housing at least one optical fiber;
- and
- an outer jacket surrounding the plurality of buffer tubes and the central strength member.
An all-dielectric self-supporting (ADSS) cable, comprising:
- a central strength member comprising:
- a first layer comprising a plurality of strength yarns helically twisted together;
- and
- a second layer comprising a rigid material having flexural modulus greater than 500 MPa formed around the first layer;
- a plurality of buffer tubes helically wrapped around the central strength member, each of the plurality of buffer tubes housing at least one optical fiber;
- and
- an outer jacket surrounding the plurality of buffer tubes and the central strength member.
Dependencies are inferred from the claim text.