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Preparation method of high-strength quartz optical fiber

A quartz fiber, high-strength technology, applied in glass manufacturing equipment, manufacturing tools, etc., can solve the problem that the strength of quartz fiber cannot meet the needs of high-strength applications, and achieve the effects of preventing micro-cracks from expanding and increasing, enhancing strength, and eliminating temperature gradients

Active Publication Date: 2021-08-06
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the deficiency that the strength of the existing silica optical fiber cannot meet the requirements of high-intensity applications, and to provide a preparation method for high-strength silica optical fiber

Method used

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  • Preparation method of high-strength quartz optical fiber

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Embodiment 1

[0027] This embodiment is a comparative example. The polished quartz preform in step 2) is directly left to cool down, instead of gradually reducing the heating temperature in step 3) by gradually reducing the hydrogen flow rate in the oxyhydrogen flame.

[0028] Using 1 in Table 1 # Parameters Quartz preforms are pretreated and drawn.

[0029] Step 1), select a quartz preform with a diameter of 30 mm, firstly perform mechanical polishing on the quartz preform, the surface roughness of the polished quartz preform is 6.5 μm;

[0030] Step 2), carry out flame polishing to quartz prefabricated rod again, wherein H 2 The flow rate is 80L / min, the flame moving speed is 50mm / min, the number of times is 2 times, and the roughness of the polished quartz preform is 4.4μm;

[0031] Step 3), the quartz preform is directly placed at room temperature;

[0032] Step 4), using HF acid and HNO acid mixed solution to pickle the quartz preform for 10 minutes, and then use deionized water to ...

Embodiment 2

[0037] This embodiment is a comparative example. The polished quartz preform in step 2) is directly left to cool down, instead of gradually reducing the heating temperature in step 3) by gradually reducing the hydrogen flow rate in the oxyhydrogen flame.

[0038] Using 2 in Table 1 # Parameters Quartz preforms are pretreated and drawn.

[0039] The wire-drawing temperature in step 5) in this embodiment is 2080° C., and the rest of the methods are the same as in Embodiment 1.

[0040] After the completion, ten optical fiber samples were selected to test the tensile strength of the optical fiber. The results are shown in Table 1. The average tensile strength of the optical fiber is 52.3N.

Embodiment 3

[0042] This embodiment is a comparative example. The polished quartz preform in step 2) is directly left to cool down, instead of gradually reducing the heating temperature in step 3) by gradually reducing the hydrogen flow rate in the oxyhydrogen flame.

[0043] Using 3 in Table 1 # Parameters Quartz preforms are pretreated and drawn.

[0044] The wire-drawing temperature in step 5) in this embodiment is 2160° C., and the other methods are the same as in embodiment 1.

[0045] After completion, select ten optical fiber samples to test the tensile strength of the optical fiber. The results are shown in Table 1. The average tensile strength of the optical fiber is 57.0N.

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Abstract

The invention relates to a preparation method of a quartz optical fiber, and in particular, relates to a preparation method of a high-strength quartz optical fiber, wherein the method is used for overcoming the defect that the strength of an existing quartz optical fiber cannot meet the requirements of special application occasions. The preparation method of the high-strength quartz optical fiber comprises the following steps: firstly, carrying out mechanical polishing on a quartz preform with the diameter size of 20-35 mm until the roughness is 6-8 [mu]m after polishing, then carrying out flame polishing until the roughness is 4-6 [mu]m after polishing, gradually reducing the heating temperature in a manner of gradually reducing the flow of hydrogen in oxyhydrogen flame, standing the quartz preform to room temperature after stopping heating, carrying out acid pickling treatment on the quartz preform, carrying out wire drawing at a wire drawing speed of 3-10 m / min, annealing a bare optical fiber output from an outlet of a wire drawing furnace at an annealing section length of 600 mm and an annealing temperature of 300-500 DEG C, and finally coating the bare optical fiber.

Description

technical field [0001] The invention relates to a preparation method of silica optical fiber, in particular to a preparation method of high-strength silica optical fiber. Background technique [0002] Optical fiber materials have been favored by many researchers because of their advantages such as light weight, small size, anti-electromagnetic interference, and large transmission information capacity, and are widely used in various fields such as electronics, medical treatment, bioengineering, material processing, and sensing technology. However, for some special applications, the brittleness of the existing silica fiber leads to its poor mechanical strength and is easy to break. Therefore, the development of high-strength silica fiber is the key to further develop the application field of silica fiber. Contents of the invention [0003] The purpose of the present invention is to solve the deficiency that the strength of the existing silica optical fiber cannot meet the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/012C03B37/025C03C25/105C03C25/285
CPCC03B37/01228C03B37/01237C03B37/025C03C25/105C03C25/285
Inventor 侯超奇高菘薛耀辉张卓王晓章郭海涛折胜飞张岩李艺昭
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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