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Single material plastic (polymer) optical fiber and its producing method

A plastic optical fiber, a single technology, applied in the direction of graded index core/cladding optical fiber, cladding optical fiber, optical waveguide light guide, etc., can solve the problems of reducing the glass transition temperature of the matrix, increasing material costs, and increasing equipment costs. Achieve the effect of simple process, reduce production cost and eliminate matching

Inactive Publication Date: 2006-09-13
YANSHAN UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An optical fiber composed of a variety of materials often affects the performance of the optical fiber due to poor adhesion of the material at the interface or incomplete thermal expansion and contraction; It is much higher than polymethyl methacrylate, which increases the cost of materials; fluorine-containing plastics are corrosive to equipment, and the cost of equipment will also be increased due to the use of corrosion-resistant steel; it will also increase the process and difficulty in co-extrusion or sleeve molding ; Doping high refractive index materials in the core area will reduce the glass transition temperature of the matrix, which is not conducive to the heat resistance of optical fiber applications

Method used

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  • Single material plastic (polymer) optical fiber and its producing method
  • Single material plastic (polymer) optical fiber and its producing method
  • Single material plastic (polymer) optical fiber and its producing method

Examples

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Effect test

Embodiment 1

[0029] In this example, it is necessary to pass Figure 4 The technological process, to achieve such as figure 1 Single material plastic optical fiber shown. from figure 1 It can be seen from the cross-section of the optical fiber that the diameter of the core region of this optical fiber is set to 1.02mm, and the cladding II has three circles of air holes, the first circle has 60 air holes, the second circle has 68 air holes, and the third circle has 68 air holes. There are 76 air holes. The thickness of the cladding is 0.18 mm, that is, the diameter of the cladding passing through the core region is 1.38 mm. The diameter of each air hole is 0.045mm. From this, the cross-sectional area of ​​the cladding can be calculated as:

[0030] S c = 1 4 π ( 1.38 ) 2 - 1 4 ...

Embodiment 2

[0048] In this example, it is necessary to pass Figure 4 The technological process, to achieve such as figure 2 PMMA plastic optical fiber shown. from figure 2 It can be seen from the cross-section of the optical fiber that the diameter of the core area of ​​this optical fiber is set to 0.28mm, and the cladding II has three circles of air holes, the first circle has 32 air holes, the second circle has 40 air holes, and the third circle has 40 air holes. There are 48 air holes. The thickness of the cladding is 0.12 mm, that is, the diameter of the cladding passing through the core region is 0.52 mm. The diameter of each air hole is 0.01mm. From this, the cross-sectional area of ​​cladding II can be calculated as:

[0049] S c = 1 4 π ( 0.52 ) 2 - 1 ...

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Abstract

The invention discloses a single-material-made plastic (polymer) optical fiber and its making method, its fiber core region adopts a uniform single-material plastic solid core, its coat is composed of arbitrarily-arranged air holes of different shapes and sized, but it is unallowed that there is any hole-free region in about-30 deg. sector from the fiber core to outside; numerical aperture reaches above 0.25. Its advantages: the material is single, the process is more simple and direct, and it can save a screw machine or a set of coat spreader, eliminates the factors of matching, compatibility and influence between different materials, has more flexibility in selecting and realizing numerical apertures, reduces the cost of production from many aspects and is suitable for continuous and large-scale production.

Description

technical field [0001] The present invention relates to an optical fiber and its manufacturing method, in particular to a single-material plastic optical fiber and its manufacturing method Background technique [0002] The research, production and application of plastic optical fiber have a history of decades, but in the past, the plastic optical fiber with step (S1) or graded (GI) refractive index distribution was composed of two or more materials. . For example, plastic optical fibers to date generally consist of a core material with a high refractive index and a cladding material with a low refractive index. Sometimes in order to form the core refractive index greater than the cladding refractive index, the same matrix material is also used, and a high refractive index material is doped in the core area, or a low refractive index material is doped in the cladding layer, so that light can finally pass through the interface between the core and the cladding layer. The tot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02G02B6/028
Inventor 于荣金
Owner YANSHAN UNIV
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