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Fiber optic core wire

An optical fiber core, glass optical fiber technology, applied in glass optical fibers, cladding optical fibers, light guides, etc., can solve the problem of increasing the transmission loss of optical fibers, and achieve the effect that the transmission loss is not easy to increase

Active Publication Date: 2016-03-02
FURUKAWA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The optical fiber will increase the transmission loss due to various external stresses and the resulting microbends

Method used

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  • Fiber optic core wire
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment ）

[0047] Examples of the optical fiber core wires described in the above embodiments will be described below.

[0048] In the configuration of the optical fiber 1 described above, an optical fiber 1 having a difference in the Young's modulus of the first coating layer 31 and the elution rate of the coating resin 3 was produced, and the occurrence of voids, solvent resistance, and microbending resistance were investigated. characteristic.

[0049] In the production of the optical fiber core wire of the sample, as the glass optical fiber 2, an outer diameter (diameter) of approximately A 125 μm glass optical fiber was formed with a first coating layer 31 on its outer periphery, and a second coating layer 32 was further formed on its outer periphery to manufacture an optical fiber core wire 1 . The outer diameter of the first coating layer 31 is 195 μm, and the outer diameter of the second coating layer 32 is 245 μm. These values ​​are examples and may be changed appropriately. ...

Embodiment 1

[0070] In Example 1 (sample No. 2), the first coating layer 31 and the second coating layer 32 use urethane acrylate ultraviolet curable resin, and each of the first coating layer 31 and the second coating layer 32 Young's modulus, the dissolution rate of the coating resin 3, adjust the molecular weight of the oligomer, the type of diluent monomer, the proportion of the chain transfer agent, etc., so as to adjust the Young's modulus PY of the first coating layer 31 to 0.14MPa , the elution rate E when the coating resin 3 was soaked in 60° C. warm water for 168 hours was adjusted to 2.4% by mass. In addition, 168 hours was used because the elution from the coating resin was substantially saturated by the elapse of 168 hours.

Embodiment 2

[0071] Example 2 (Sample No. 3) In addition to adjusting the molecular weight of the oligomer, the type of diluent monomer, the proportion of the chain transfer agent, etc., the Young’s modulus PY of the first coating layer 31 was adjusted to 0.20 MPa, and the coating The elution rate E of the resin 3 when immersed in warm water at 60° C. for 168 hours was the same as in the above-mentioned Example 1, except that it was adjusted to 1.8% by mass.

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Abstract

The present invention provides an optical fiber in which transmission loss is not easily increased when the optical fiber is immersed in water and then dried and also which has a solvent resistant property and a micro-bend resistant property. An optical fiber (1) according to one embodiment of the present invention is an optical fiber (1) in which at least two layers of coating resin (3) coat the circumference of a glass optical fiber (2). When a Young's modulus of the first coating layer (31) of the coating resin (3) is defined by PY (MPa) and a water extractable rate of the coating resin (3) after immersion in 60°C hot water for 168 hours is defined by E (mass·%), a formula of 1.8 ‰¤ E ‰¤ 8.61 × PY + 1.40 is satisfied.

Description

technical field [0001] The invention relates to an optical fiber core wire, in particular to an optical fiber core wire accommodated in an optical fiber cable. Background technique [0002] In recent years, with the advancement of FTTH (Fiber To The Home), in order to reduce the transmission loss of optical fibers, it is required to improve the microbending resistance of optical fibers. [0003] The optical fiber will increase the transmission loss due to various external stresses and the resulting microbends. In order to protect the optical fiber from such external stress, the optical fiber is generally coated with a resin having a double-layer structure on the glass optical fiber. In addition, an optical fiber in which a certain coating is applied to a glass optical fiber is called an optical fiber core. [0004] As an optical fiber core wire having a coating layer having a double-layer structure, an optical fiber core wire is disclosed in which the elution rate of the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C25/24G02B6/44
CPCC03C25/50G02B6/02395G02B6/4403
Inventor 斋藤稔笠原稔望月浩二田中广树中岛康雄
Owner FURUKAWA ELECTRIC CO LTD
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