A kind of preparation method of high-strength silica optical fiber

A quartz optical fiber, high-strength technology, used in glass manufacturing equipment, manufacturing tools, etc., can solve the problem that the strength of the quartz optical fiber cannot meet the needs of high-strength applications, and achieve the purpose of preventing the expansion of micro-cracks, reducing internal stress, and reducing internal stress. Effect

Active Publication Date: 2022-05-06
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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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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  • A kind of preparation method of high-strength silica 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 silica optical fiber, in particular to a preparation method of high-strength silica optical fiber, which is used to solve the disadvantage that the strength of the existing silica optical fiber cannot meet the requirements of special application occasions. The preparation method of the high-strength silica optical fiber comprises the following steps: firstly, mechanically polishing a quartz preform with a diameter of 20-35 mm, the roughness after polishing is 6-8 μm, and then performing flame polishing, and the roughness after polishing is 4-6 μm , and then gradually reduce the heating temperature by gradually reducing the flow rate of hydrogen in the oxyhydrogen flame. After stopping the heating, let the quartz preform stand at room temperature, pickle the quartz preform and then draw it. The drawing speed is 3-10m / min , while annealing the bare optical fiber output from the exit of the drawing furnace, the length of the annealing section is 600mm, the annealing temperature is 300-500°C, and finally the bare optical fiber is coated.

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 Patents(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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