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A long-lived fiber for high-stress environments

A long-life, high-stress technology, applied in the direction of multi-layer core/cladding optical fiber, cladding optical fiber, etc., can solve problems that affect customer perception, reduce service life, and trouble the development of optical fiber cold splicing technology, so as to improve dynamic Fatigue parameters, long service life, effect of improving resistance to external impurities

Active Publication Date: 2017-01-11
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the cold splicing environment, the optical fiber is subject to high stress and interference from external water vapor, air, etc. The service life of the optical fiber with conventional materials and coating structures will be greatly reduced, which will affect the customer's perception of use and become a problem that plagues the development of optical fiber cold splicing technology. important restrictions

Method used

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  • A long-lived fiber for high-stress environments
  • A long-lived fiber for high-stress environments
  • A long-lived fiber for high-stress environments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The first coating 2 outside the silica optical fiber 1 is titanium dioxide with a thickness of 3nm; the thickness of the second coating 3 and the third coating 4 are both 30 μm; Polypropylene resin, the third coating 4 is a polypropylene resin with a Young's modulus of 1200MPa.

[0025] During preparation, firstly, a quartz rod is fused and drawn into a quartz optical fiber 1 by using a high-temperature furnace, and a 3nm-thick titanium dioxide layer is deposited on its surface through a plasma chemical vapor deposition device arranged next to the lower furnace mouth of the high-temperature furnace, that is, the first coating 2. Then prepare the second coating 3 and the third coating 4 by dry + wet method, and use the sealing pressure coating method to first coat the polypropylene resin (softer polyacrylic resin) with a Young's modulus of 0.5Mpa in a thickness of 30 μm, Use ultraviolet light to cure it from liquid to solid; then use sealing pressure to coat and coat po...

Embodiment 2

[0030] The first coating 2 outside the silica optical fiber 1 is carbon, and its thickness is 3 nm; the thickness of the second coating 3 and the third coating 4 are both 30 μm; Polypropylene resin, the third coating 4 is a polypropylene resin with a Young's modulus of 700MPa.

[0031] The method of preparation is the same as that of Example 1, and will not be repeated here, except that the second coating is coated with a polypropylene resin with a Young's modulus of 0.3 MPa using the sealing pressure coating method; the third coating 4 is a polypropylene resin with a Young's modulus of 700 MPa.

[0032] In this embodiment, since the service life prediction model of the optical fiber usually adopts the following life calculation formula:

[0033] t s = t p ( σ p σ s ) ...

Embodiment 3

[0036] The first coating 2 outside the silica optical fiber 1 is a high-density polyethylene compound with a thickness of 0.5 μm, the thickness of the second coating 3 and the third coating 4 are both 30 μm; the second coating 3 is Young’s A polypropylene resin with a modulus of 0.7MPa, and the third coating 4 is a polypropylene resin with a Young's modulus of 800MPa.

[0037] During the preparation, firstly, the quartz rod is fused and drawn into the quartz optical fiber 1 by using a high-temperature furnace, and then a high-density polyethylene compound is coated through a mold to form a first coating 2, which is cured by ultraviolet light. Then adopt the wet + wet method, the second coating 3 and the third coating 4 are coated together by the sealing pressure coating method, wherein the second coating 3 is in the third coating 4, and then the two layers are coated with ultraviolet light Together the coatings cure from liquid to solid.

[0038] In this embodiment, since the...

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Abstract

Disclosed is a long-service-life optical fiber applicable to a high-stress environment and the optical fiber relates to the field of optical-fiber manufacturing. Three coatings are arranged on the surface of a quartz optical fiber to the outside: a first coating is one of titanium dioxide, carbon or a high-density polyvinyl compound. A second coating is a polypropylene resin with a Young modulus of 0.3 to 0.7 Mpa. A third coating is a polypropylene resin with a Young modulus of 700 to 1200 Mpa. The long-service-life optical fiber applicable to the high-stress environment adopts a three-coating method so that the optical fiber is high in dynamic fatigue coefficient, high in stress resistance capability and longer in service life under a high-stress environment.

Description

technical field [0001] The invention relates to the field of optical fiber manufacturing, in particular to a long-life optical fiber suitable for high-stress environments. Background technique [0002] At present, the coating structure of conventional optical fibers is generally a double-coating structure, which is divided into an inner coating and an outer coating. Generally, the inner coating is made of a softer material, and the outer coating is made of a harder material. The purpose of this is that when the optical fiber is subjected to an external force, the harder outer layer first acts to resist the external force, and then the softer inner layer buffers the external force. However, when the use environment is relatively special or relatively harsh, the double-coating structure design has the phenomenon of reduced reliability, poor optical fiber performance, or even unusable phenomena. [0003] In the current detection of the use status of buildings such as bridges a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/036
Inventor 罗文勇李诗愈陈伟柯一礼杜城张涛莫琦胡福明
Owner FENGHUO COMM SCI & TECH CO LTD
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