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Signal transmitting cable

A signal transmission and cable technology, which is applied in the field of optical fiber signal transmission cables, can solve problems such as broken glass fibers, affecting long-term signal transmission performance, and disadvantages

Inactive Publication Date: 2007-12-05
EMTELLE UK
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Uncured resin has the potential to crack and produce agents that can damage the glass fiber, adversely affecting its long-term signal transmission performance

Method used

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  • Signal transmitting cable
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Embodiment Construction

[0040] Referring to Figure 1, an optical fiber cable 2 comprising 8 optical fibers is constructed by coating a single central fiber 4 with a UV curable acrylate material 6 to change the outer diameter of the coated fiber 4 from 245 microns to The standard commercial diameter increases to 320 microns. The diameter of 320 microns is such that 7 further optical fibers 10 of the same construction as the central fiber 4 and having a commercially available diameter of 245 microns can be placed around the circumference of the coated central fiber 4 to Each of the seven fibers 10 is brought into contact contact with the coated larger diameter central fiber 4 and its two adjacent fibers 10 .

[0041] The assembly is then coated with an outer layer 12 of a UV curable acrylate material which is applied in liquid form under low pressure. Since the seven outer fibers 10 are in contact with the coated central fiber 4 and its two corresponding neighbors 10, none of the outer fibers 10 can m...

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Abstract

A cable (302) has (8) fibres (304) are encapsulated by a UV curable layer (306) having a diameter of approximately (1010) microns, and (16) outer fibres (316) arranged in a circular formation around the inner fibres (304). The optical fibres (304) are held in position by means of the UV curable layer (306) so that the UV curable material of the layer (306) does not penetrate into the gaps between the optical fibres (304) and the outermost optical fibres (304) are restrained by the layer from moving axially. It is found that such an arrangement provides surprisingly favourable bending properties, making the cable particularly suitable for installation in a tube by means of blowing.

Description

technical field [0001] The present invention relates to a signal transmission cable, more particularly but not exclusively to an optical fiber signal transmission cable. Background technique [0002] Optical fibers have traditionally been installed into underground ducts by attaching a pulling member to one end of the cable and the cable being twisted into the duct. As a result, such cables are large and greatly reinforced, protecting the relatively delicate fiber optic components from damage during installation. [0003] Traditional cables are constructed by first fabricating a subassembly, which includes a tube fabricated from thermoplastic material and typically contains twelve fiber optic elements. Many of these tubes are then assembled together by twisting them around a central strength member. The stranding process and the fact that the tube takes up a lot of space relative to the fiber optic elements means that all fibers experience the same strain when the cable is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/44
CPCG02B6/4438G02B6/4403G02B6/4411G02B6/44
Inventor 乔治·亨利·普拉特·布朗大卫·约翰·斯托克顿凯文·托马斯·科伯恩格雷格·伊恩·麦基尔雷思
Owner EMTELLE UK
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