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High temperature resistant optical fiber and preparation method thereof

A technology of high temperature resistance and optical fiber, which is applied in the direction of cladding optical fiber, glass optical fiber, optical waveguide and light guide, etc. It can solve the problems of affecting the geometric parameters of optical fiber, not suitable for long-distance use, and large transmission loss of optical fiber, so as to achieve low and reliable optical fiber transmission loss Optical fiber transmission performance, stable and consistent effect of diameter

Active Publication Date: 2019-01-11
JIANGSU HENGTONG OPTICAL FIBER TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the drawing speed of the optical fiber is 200-1500m / min during preparation, the drawing speed is too low and the production capacity is low, which will affect the geometric parameters of the optical fiber and bring higher production costs, and although single-layer coating simplifies coating However, the optical fiber transmission loss is too large, so it is not suitable for long-distance use

Method used

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  • High temperature resistant optical fiber and preparation method thereof
  • High temperature resistant optical fiber and preparation method thereof
  • High temperature resistant optical fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The high temperature resistant optical fiber of this embodiment is prepared by the following process:

[0055] (1) Put the online rod and polished rod in the graphite furnace for high-temperature melting and drawing at 2000°C, and the speed is controlled at 2200m / min, allowing a certain error in the diameter of the polished rod;

[0056] (2) After the melted and drawn optical fiber is annealed and cooled at room temperature, it directly enters the double-coated mold for one-time coating. The PSU system controls the matching of the gas and speed at the melting end of the optical rod, and the adjustment of the mold can control different coatings. coating diameter, the coating pressure of the inner coating is 2.5bar, the coating pressure of the outer coating is 5bar, and the coating temperature is 40°C;

[0057] (3) The coated optical fiber is cured under the high power of 6 UV lamps;

[0058] (4) A high temperature resistant optical fiber with a diameter of 200 μm was pr...

Embodiment 2

[0064] The high temperature resistant optical fiber of this embodiment is prepared by the following process:

[0065] (1) Put the online rod and polished rod in a graphite furnace for high-temperature melting and drawing at 2200°C, and the speed is controlled at 2100m / min, allowing a certain error in the diameter of the polished rod;

[0066] (2) After the melted and drawn optical fiber is annealed and cooled at room temperature, it directly enters the double-coated mold for one-time coating. The PSU system controls the matching of the gas and speed at the melting end of the optical rod, and the adjustment of the mold can control different coatings. coating diameter, the coating pressure of the inner coating is 1 bar, the coating pressure of the outer coating is 4.5 bar, and the coating temperature is 35°C;

[0067] (3) The coated optical fiber is cured under the high power of 5 UV lamps;

[0068] (4) A high temperature resistant optical fiber with a diameter of 200 μm was pr...

Embodiment 3

[0074] The high temperature resistant optical fiber of this embodiment is prepared by the following process:

[0075] (1) Put the online rod and polished rod in the graphite furnace for high-temperature melting and drawing at 1900°C, and the speed is controlled at 2000m / min, allowing a certain error in the diameter of the polished rod;

[0076] (2) After the melted and drawn optical fiber is annealed and cooled at room temperature, it directly enters the double-coated mold for one-time coating. The PSU system controls the matching of the gas and speed at the melting end of the optical rod, and the adjustment of the mold can control different coatings. coating diameter, the coating pressure of the inner coating is 3bar, the coating pressure of the outer coating is 5.5bar, and the coating temperature is 45°C;

[0077] (3) The coated optical fiber is cured under the high power of 6 UV lamps;

[0078] (4) A high temperature resistant optical fiber with a diameter of 245 μm was pr...

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Abstract

The invention provides a high temperature resistant optical fiber and a preparation method thereof. The high temperature resistant optical fiber comprises an optical fiber core layer, a cladding layerand a double-layer coating, wherein, the coating material of an inner coating is composed of an acrylate oligomer, 2-hydroxyl-2-methyl propiophenone, vinyl tri(2-methoxy ethoxyl) silane and (2,4,6-trimethyl benzoyl)diphenyl phosphine xide; an outer coating is a high temperature resistant acrylic resin outer coating. The high temperature resistant optical fiber still maintains the reliability of optical transmission at a high temperature environment of 150DEG C for a long time, optical fiber coating has no aging phenomena of yellowing and blackening. The method is simple. The optical fiber transmission loss of the high temperature resistant optical fiber prepared at the wiredrawing speed of 2000-2200m / min, the attenuation value of the optical fiber at 1550nm is not more than 0.25dB / km, theadditional attenuation value of the optical fiber at environment of 150DEG C for a long time is not more than 0.05dB / km.

Description

technical field [0001] The invention belongs to the technical field of optical fiber processing, and relates to an optical fiber and a preparation method thereof, in particular to a high-temperature-resistant optical fiber and a preparation method thereof, in particular to a low-loss high-temperature-resistant optical fiber and a preparation method thereof, in particular to a low-loss optical fiber High temperature resistant optical fiber and its high-speed wire drawing preparation method. Background technique [0002] With the rapid development of the field of optical communication, optical fiber has been widely used as a basic material in many fields. Different application scenarios have different requirements for the performance of optical fibers. For example, high-temperature fields such as high-temperature sensing and oil and gas fields have special requirements for the temperature resistance of optical fibers. At present, conventional optical fibers can only guarantee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C25/10C03C25/50G02B6/02C09D4/06C09D163/10
CPCC03C25/1065C03C25/50C09D4/06C09D163/10G02B6/02395
Inventor 陈伟沈良严勇虎朱永刚魏志猛李永通王林操斌李辉史辉代文豪王忠凯王辉董鹏展范鹏涛
Owner JIANGSU HENGTONG OPTICAL FIBER TECH
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