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Preparation method of gradient polymer optical fiber premade rod

A technology of optical fiber preform and polymer, which is applied in the direction of optical components, other household appliances, household appliances, etc., can solve the problems of unsatisfactory optical fiber bandwidth performance, inability to accurately control the distribution curve of the refractive index in the radial direction of optical fiber, etc., and achieve good bandwidth performance effect

Inactive Publication Date: 2008-08-06
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is also that the distribution curve of the refractive index in the radial direction of the fiber cannot be precisely controlled, so the bandwidth performance of the obtained fiber is often not ideal.

Method used

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  • Preparation method of gradient polymer optical fiber premade rod
  • Preparation method of gradient polymer optical fiber premade rod
  • Preparation method of gradient polymer optical fiber premade rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First add 1.8g of high-purity azobisisobutyronitrile (AIBN), 2ml of dodecanethiol to 600g of high-purity MMA monomer, stir at 85°C, prepolymerize to a conversion rate of 15%, cool down, stop stirring, and add to In a stainless steel tube with a polished inner wall and one end closed, the tube has a diameter of 32 mm and a length of 1000 mm. Pass high-purity nitrogen gas through the tube to exclude oxygen in the system, and seal it. Fix the stainless steel tube on the centrifuge device, turn on the centrifuge at a speed of 1000rpm, set the temperature at 45°C, and centrifuge for 6 hours, so that the added MMA adheres to the inner wall of the stainless steel tube and polymerizes to form a PMMA layer with a thickness of about 6mm.

[0026] In the second step, add 1.2g of high-purity azobisisobutyronitrile (AIBN), 1ml of dodecanethiol, and 14ml of bromobenzene to 300g of high-purity MMA monomer, stir at 85°C, and prepolymerize until the conversion rate is 15%. , cool down,...

Embodiment 2

[0029] First, add 2.4g of high-purity azobisisobutyronitrile (AIBN), 2ml of dodecanethiol to 600g of high-purity MMA monomer, stir at 85°C, prepolymerize to a conversion rate of 15%, cool down, stop stirring, and add to In a stainless steel tube with a polished inner wall and one end closed, the tube has a diameter of 32 mm and a length of 1000 mm. Pass high-purity nitrogen gas through the tube to exclude oxygen in the system, and seal it. Fix the stainless steel tube on the centrifuge device, turn on the centrifuge at a speed of 1000rpm, set the temperature at 50°C, and centrifuge for 3 hours, so that the added MMA adheres to the inner wall of the stainless steel tube and polymerizes to form a PMMA layer with a thickness of about 6mm.

[0030]In the second step, add 1.5g of high-purity azobisisobutyronitrile (AIBN), 1ml of dodecanethiol, and 14ml of bromobenzene to 300g of high-purity MMA monomer, stir at 85°C, and prepolymerize until the conversion rate is 15%. , cool down,...

Embodiment 3

[0033] First add 1.8g of high-purity azobisisobutyronitrile (AIBN), 2ml of dodecanethiol to 600g of high-purity MMA monomer, stir at 85°C, prepolymerize to a conversion rate of 15%, cool down, stop stirring, and add to In a stainless steel tube with a polished inner wall and one end closed, the tube has a diameter of 32 mm and a length of 1000 mm. Pass high-purity nitrogen gas through the tube to exclude oxygen in the system, and seal it. Fix the stainless steel tube on the centrifuge device, turn on the centrifuge at a speed of 1000rpm, set the temperature at 45°C, and centrifuge for 6 hours, so that the added MMA adheres to the inner wall of the stainless steel tube and polymerizes to form a PMMA layer with a thickness of about 6mm.

[0034] In the second step, add 1.2g of high-purity azobisisobutyronitrile (AIBN), 1ml of dodecanethiol, and 21ml of bromobenzene to 300g of high-purity MMA monomer, stir at 85°C, and prepolymerize to a conversion rate of 15%. , cool down, stop...

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Abstract

A process for preparing the prefabricated gradient optical fiber rod from polymer includes such steps as adding trigger and chain transferring agent to high-purity methyl methylacrylate, prepolymerizing until the transversion rate is 8-20%, adding it in a stainless steel container or glass tube with one closed end, high-speed rotating to obtain a methyl polymethylacrylate layer on inner surface, adding trigger, chain transferring agent and doping agent to another high-purity methyl methylacrylate, and continuously repeating said steps. Its advantages are large size and controllable refractivity curve.

Description

technical field [0001] The invention belongs to the fields of broadband access and information communication in high-speed optical communication networks and the field of photoelectric materials, and in particular relates to a preparation method of a gradient polymer optical fiber preform. Background technique [0002] Compared with silica fiber, polymer optical fiber (POF) has the advantages of good flexibility, large fiber diameter, easy adjustment of numerical aperture, etc., and has a low overall cost of use, and is considered to be the best choice in short-distance distributed networks. ideal medium. POF is divided into two types: step optical fiber (SI-POF) whose refractive index does not change in the radial direction of the fiber (SI-POF) and gradient optical fiber (GI-POF) whose refractive index changes gradually in the radial direction. Compared with the former, the latter has a smaller modal dispersion, so the bandwidth is much larger than the former. With the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D11/00C08F20/14
Inventor 钟力生马素德徐传骧
Owner XI AN JIAOTONG UNIV
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