Communication cable with glass fiber light waveguides
AssigneeSiemens Aktiengesellschaft
InventorsGuenter Zeidler, Ulrich Oestreich
Life of this patent
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Abstract
A communication cable having at least one light waveguide of a glass fiber provided with a close fitting casing characterized by the casing being prestressed in tension to exert a uniform constant longitudinal compression upon the glass fiber. The casing material, which may be a thermoplastic material selected from a group consisting of polyester, fluoropolymers, polyamides and polymethacrylates, can also be impregnated with filaments which are also placed in tension to apply a compressive force on the glass fiber.
Claims8
In a communication cable having at least one light waveguide of a glass fiber provided with a close fitting casing, the improvement comprising the casing being of a material with a modulus of elasticity greater then 1500 N/mm.sup.2, said casing having a layer thickness of at least 100 .mu.m and a maximum thickness of 1.5 mm, said casing being prestressed in tension to exert a uniform constant longitudinal compression upon the glass fiber.
Dependencies are inferred from the claim text.