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Method for preparing optical fiber of polymer in gradation type of refractive index

A refractive index, polymer technology, applied in graded index core/clad fibers, clad fibers, optical waveguides, etc., can solve the problems of large optical loss and difficulty, and achieve long life expectancy and stability. good effect

Inactive Publication Date: 2008-05-28
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method overcomes the complexity and difficulty of producing graded polymer optical fiber in the prior art and the shortcomings of large optical loss caused by the production process, and is convenient for continuous production, and the obtained graded refractive index polymer optical fiber has relatively high Good stability and long life expectancy

Method used

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  • Method for preparing optical fiber of polymer in gradation type of refractive index
  • Method for preparing optical fiber of polymer in gradation type of refractive index
  • Method for preparing optical fiber of polymer in gradation type of refractive index

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Put 30 grams of pure polycarbonate (PC of Bisphenol A) fibers with a diameter of 1.0 mm in a clean autoclave with a volume of 1 L, add 0.5 ml methyl methacrylate, 0.5 ml ethyl acrylate and 10 mg initiator for peroxidation Dibenzoyl, control the ambient temperature of the autoclave to 50°C. Introduce carbon dioxide until the pressure reaches 10MPa, and keep under this pressure for 20 hours to make methyl methacrylate, ethyl acrylate and initiator dibenzoyl peroxide penetrate into the polycarbonate fiber. Slowly reduce the pressure to get rid of carbon dioxide and the regulator monomers contained therein, then raise the temperature to 70°C and keep for 4 hours, so that the methyl methacrylate and ethyl acrylate in the fiber are quickly polymerized under the action of the initiator, and the refractive index is obtained from Polycarbonate with decreasing radius from the center to the outside. Slightly stretched on a stretching machine at 120° C. to obtain a graded-index po...

Embodiment 2

[0049] Put 30 grams of pure polycarbonate (PC of Bisphenol A) fibers with a diameter of 1.0 mm in a clean autoclave with a volume of 1 L, add 0.5 ml methyl methacrylate, 0.5 ml ethyl acrylate and 10 mg initiator for peroxidation Dibenzoyl, control the ambient temperature of the autoclave to 50°C. Introduce carbon dioxide until the pressure reaches 10 MPa, and keep under this pressure condition for 15 hours, so that methyl methacrylate, ethyl acrylate and initiator dibenzoyl peroxide penetrate into the polycarbonate fiber. Slowly reduce the pressure to remove carbon dioxide and the remaining monomers, then raise the temperature to 70°C and keep it for 4 hours, so that the methyl methacrylate and ethyl acrylate in the fiber can be quickly polymerized under the action of the initiator, and the refractive index is obtained from the center along the Polycarbonate with decreasing radius from inside to outside. Slightly stretched on a stretching machine at 120° C. to obtain a graded...

Embodiment 3

[0051] The pure polycarbonate among the embodiment 1 is changed into other polycarbonates or the polystyrenes that contain a plurality of aryl groups or aryl derivatives in the molecule, under the close condition with embodiment 1,2, can equally A graded refractive index polymer fiber is obtained. Refractive index distribution and Figure 4 similar.

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Abstract

A method for preparing polymer fibre in refractive power ( RP ) graded type includes preparing pure fibre polymer fibre with uniform RP index, dipping prepared fibre into regulator monomer and initiator which are not solvent for said polymer and have two RP indexes less than index of said polymer, having monomer distributed in gradient from low to high along radius direction of centre to surface layer, having monomer polymerized under initiator action by raising temperature for obtaining polymer fiber with stable RP index gradation.

Description

technical field [0001] The invention relates to a graded polymer optical fiber with a refractive index, in particular to a preparation method for a polymer optical fiber with a gradient distribution of the refractive index from the fiber center to the skin layer along the radial direction from high to low. According to this method, graded-refractive-index polymer optical fibers can be produced continuously. Background technique [0002] With the rise and high-speed development of the Internet, the requirements for communication speed and capacity are getting higher and higher. The first generation of communication network is a narrow-band line connected by cables; the second generation is an electro-optical network that uses glass optical fibers instead of cables to form a network and converts electrical signals within nodes. Corning Glass Company of the United States successfully developed the glass optical fiber that can transmit laser light to the intended destination fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/028G02B6/02C03B37/018
CPCB29D11/00682G02B6/028G02B6/02038
Inventor 黄莹韩布兴刘志敏徐坚张世民杨冠英何俊艾希成赵彤阳明书宋延林王笃金费昌沛朱道本
Owner INST OF CHEM CHINESE ACAD OF SCI