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fiber optic cable

An optical fiber cable and optical fiber technology, applied in the field of optical fiber and cable, can solve problems such as disconnection and fiber damage, and achieve the effect of reducing the possibility of optical fiber disconnection and suppressing loss fluctuations.

Inactive Publication Date: 2011-11-30
FURUKAWA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In this way, when the ovipositor penetrates into the sheath, the optical fiber inside is pierced by the ovipositor, causing the fiber to be damaged and disconnected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0074] Using thermoplastic resin to form the sheath 3, manufactured with figure 1 In the same optical fiber cable 10 as shown, the thermoplastic resin can change the stress at the yield point and the 0.3% modulus by adjusting the type (density) of the base polyolefin material and the type / amount of compounded resin or flame-retardant material. , Tensile strength, Shore D. Using these optical fiber cables 10, the average depth of spawning scars, loss variation during spawning, ease of extraction at -20°C, ease of extraction at normal temperature, separation performance of support wires at -20°C, normal temperature The separation performance under the support wire was evaluated.

[0075] In addition, the methods for evaluating the average depth of spawning scars and loss fluctuation during spawning are the same as those described above. In addition, the measurement of the tensile strength was performed at 23° C. using a No. 2 dumbbell sample by a method based on JIS K7113.

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Abstract

The present invention aims to provide an optical fiber cable enabling further reduction of possibilities of disconnection of optical fiber due to, for instance, cicada oviposition. The optical fiber cable (10) is provided with: an optical fiber core (1); a tension member (2), which is arranged in parallel to the optical fiber core (1) on one side or on the both sides of the optical fiber core (1); and a sheath (3) which integrally covers the optical fiber core (1) and the tension member (2). At least one portion of the sheath (3) is composed of a polymeric material having a yield point stressof 12 MPa or higher.

Description

technical field [0001] The present invention relates to fiber optic cables. Background technique [0002] The optical fiber core is usually covered with a double-layer structure including a soft layer and a hard layer made of ultraviolet curable resin or thermosetting resin on the outer periphery of a glass optical fiber made of silica glass or the like. The soft layer (hereinafter referred to as the primary coating layer) in contact with the glass optical fiber is made of a soft resin with a relatively low elastic modulus, and this soft layer functions as a buffer layer (stress relaxation layer). The hard layer (hereinafter referred to as the secondary covering layer) located on the outer periphery of the soft layer is made of a hard resin with a relatively high elastic modulus, and this hard layer functions as a protective layer. In addition, an extremely thin coloring layer for identification may be provided on the outer periphery of the secondary covering layer as neede...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/44
CPCG02B6/4402G02B6/4433
Inventor 塚本昌义星野豊冈田昇
Owner FURUKAWA ELECTRIC CO LTD
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