Coated optical fiber ribbon

A technology of optical fiber ribbon and optical fiber, applied in the direction of glass optical fiber, clad optical fiber, optics, etc., can solve the problems of lack of flame retardancy and shielding characteristics, and achieve flame retardancy, good flame retardancy, and good shielding characteristics Effect

Inactive Publication Date: 2009-02-25
FURUKAWA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, if the strand cover or the tape cover is thinned to reduce the diameter of the optical fiber strand and the thickness of the optical fiber ribbon, there is a problem that good flame retardancy and shielding properties cannot be obtained.

Method used

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  • Coated optical fiber ribbon
  • Coated optical fiber ribbon
  • Coated optical fiber ribbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] figure 1 is a cross-sectional view schematically showing the optical fiber ribbon according to Embodiment 1 of the present invention. Such as figure 1 As shown, the optical fiber ribbon 10 of Embodiment 1 is formed by arranging 12 optical fiber strands 11 with a layer of strand covering 112 formed on the outer periphery of a glass optical fiber 111 in parallel, and covering them together with the ribbon covering 12. of.

[0025] in addition, figure 2 yes figure 1 A cross-sectional view of an optical fiber strand 11 is shown. The outer diameter R11 of the glass optical fiber 111 is 55 to 90 μm. Therefore, as a small diameter smaller than that of a normal optical fiber having an outer diameter of 125 μm, it is possible to improve accommodation and reduce the probability of breakage due to bending, and to form a small diameter to such an extent that transmission loss does not increase. The glass optical fiber 111 will be described later.

[0026] In addition, the Y...

Embodiment approach 2

[0046] Next, the optical fiber ribbon in Embodiment 2 of the present invention will be described. Figure 4 is a cross-sectional view schematically showing an optical fiber ribbon in Embodiment 2 of the present invention. Such as Figure 4 As shown, the optical fiber ribbon 20 in Embodiment 2 is formed by arranging 12 optical fiber strands 21 with a strand cover 212 formed on the outer periphery of a glass optical fiber 211 in parallel, and covering them collectively with the ribbon cover 22 of.

[0047] Figure 5 yes Figure 4 A cross-sectional view of an optical fiber strand 21 is shown. Like the optical fiber strand 11 in Embodiment 1, the optical fiber strand 21 has a strand cover 212 formed on the outer periphery of the glass optical fiber 211 . In addition, the glass optical fiber 211 is a single-mode optical fiber having a generally stepped refractive index profile having a central core 211a and a clad 211b formed around the central core 211a. In addition, the out...

Embodiment 1～3、 comparative example 1～4

[0056] As Examples 1 to 3 and Comparative Examples 1 to 4 of the present invention, optical fiber ribbons were produced. 7 shows the characteristics of the optical fiber strand, the characteristics of the optical fiber ribbon, the total thickness of the flame-retardant coating, the burning test, and the shielding test for the optical fiber ribbons in Examples and Comparative Examples of the present invention. The result of , and the graph of the evaluation of containment.

[0057] In Fig. 7, regarding Examples 1 and 2 where the strand covering is composed of one layer, this covering is referred to as the "second layer", and regarding Example 3 where the strand covering is composed of a non-flammable layer and a flame-retardant layer And Comparative Examples 1-4, let a non-flame-retardant layer be a "1st layer", and let a flame-retardant layer be a "2nd layer." In addition, [UV] means a non-flammable ultraviolet curable resin, and "flame retardant" means a flame retardant ultr...

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Abstract

An optical fiber ribbon of 300 [mu]m or less thickness comprising, parallelly disposed, optical fiber wires each having a glass optical fiber provided at its periphery with a wire coating, the optical fiber wires collectively clad by a tape coating, wherein the wire coating consists of a non-flame-retardant ultraviolet hardened resin and wherein the tape coating has a thickness of 40 [mu]m or more and consists of a flame-retardant resin. Thus, there can be provided an optical fiber ribbon that despite being thin, realizes good flame retardation and screening characteristics.

Description

technical field [0001] The present invention relates to an optical fiber ribbon core (optical フアイバテ-プ core) having flame retardancy ). Background technique [0002] In recent years, an optical interconnection method using optical fibers for wiring has attracted attention as a signal transmission technology in transmission equipment. In this case, the optical fiber is generally used as an optical fiber ribbon. Here, the optical fiber ribbon refers to an optical fiber strand that is arranged in parallel on the outer periphery of a glass optical fiber and formed with a strand covering such as an ultraviolet curable resin, and is also covered with a tape covering such as an ultraviolet curable resin. With heart line. Conventional optical fiber ribbons used in the optical interconnection method form, for example, a 250 μm outer diameter by forming a strand covering consisting of two layers, the first layer and the second layer, on the outer periphery of a quartz-based glass o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/44
CPCG02B6/4403G02B6/03627G02B6/02395G02B6/4436
Inventor 稻叶治己杉崎隆一八木健
Owner FURUKAWA ELECTRIC CO LTD
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