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Radiation-resistant high-performance silica fiber and preparation method thereof

A technology of quartz optical fiber and manufacturing method, which is applied in the direction of manufacturing tools, glass molding, glass manufacturing equipment, etc., can solve the problems affecting long-distance communication, large transmission attenuation of near-infrared communication window, etc., so as to improve production efficiency and radiation resistance capacity and reduce production costs

Active Publication Date: 2013-04-03
HANGZHOU FUTONG COMM TECH CO LTD +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Adding a certain amount of OH, such as 500ppm, to the pure silica fiber core can improve the radiation resistance of x-rays, gamma rays, and deep ultraviolet rays of the fiber, but due to the existence of OH, the transmission attenuation in the near-infrared communication window increases , affecting conventional long-distance communication

Method used

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  • Radiation-resistant high-performance silica fiber and preparation method thereof
  • Radiation-resistant high-performance silica fiber and preparation method thereof
  • Radiation-resistant high-performance silica fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment A

[0035] Such as Figure 1A Shown is the optical fiber waveguide refractive index profile of this embodiment, and the following are optical fiber structural parameters:

[0036] The core (also called the core layer) Core is pure silica glass, and the relative refractive index difference Δn of the core relative to pure silica glass 1 About 0, the core radius r1 is about 6.6um;

[0037] The inner cladding Clad1 is a silica glass layer doped with 10000ppm fluorine, and the relative refractive index difference Δn of the inner cladding relative to pure silica glass 2 About -0.35%, inner cladding radius r2 is about 16um;

[0038] The outer cladding layer Clad2 is a silica glass layer doped with 5000ppm fluorine, and the relative refractive index difference Δn of the outer cladding layer relative to pure silica glass 3 About -0.2%, the outer cladding radius r3 is 39.9um;

[0039] The dispersion curve of the obtained optical fiber versus wavelength is as follows Figure 4A In the cu...

Embodiment B

[0046] Such as Figure 1B Shown is the optical fiber waveguide refractive index profile of this embodiment, and the following are optical fiber structural parameters:

[0047] The core layer Core is 500ppm fluorine-doped silica glass, the relative refractive index difference Δn1 of the core relative to pure silica glass is about -0.02%, and the core radius r1 is about 8um;

[0048] The inner cladding Clad1 is 10800ppm fluorine-doped silica glass, the relative refractive index difference Δn2 of the inner cladding relative to the pure silica glass is about -0.38%, and the radius r2 of the inner cladding is about 16um;

[0049] The outer cladding Clad2 is 4300ppm fluorine-doped silica glass layer, the relative refractive index difference Δn3 of the outer cladding relative to the pure silica glass is about -0.15%, and the outer cladding radius r3 is 38.5um.

[0050] The dispersion curve of the obtained optical fiber versus wavelength is as follows Figure 4A In the curve B, the ...

Embodiment C

[0057] Such as Figure 1C Shown is the optical fiber waveguide refractive index profile of this embodiment, and the following are optical fiber structural parameters:

[0058] The core layer Core is silica glass doped with 200ppm hydroxyl and 500ppm fluorine, the relative refractive index difference Δn1 of the core relative to pure silica glass is about -0.02%, and the core radius r1 is about 100um;

[0059] The inner cladding Clad1 is 12000ppm fluorine-doped silica glass, the relative refractive index difference Δn2 of the inner cladding relative to the pure silica glass is about -0.42%, and the radius r2 of the inner cladding is about 5um;

[0060] The outer cladding Clad2 is a 1700ppm fluorine-doped silica glass layer, the relative refractive index difference Δn3 of the outer cladding relative to the pure silica glass is about -0.06%, and the outer cladding radius r3 is about 10um.

[0061] The above-mentioned radiation-resistant high-performance silica fiber adopts a mixe...

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Abstract

The invention relates to a radiation-resistant high-performance silica fiber and a preparation method thereof. The radiation-resistant high-performance silica fiber provided by the invention is composed of a silica glass material based fiber core, an inner cladding and an outer cladding, wherein the fiber core contains 0-2000ppm of hydroxyl group and 0-1000ppm of fluorine, the inner cladding is doped with 10000-20000ppm of fluorine, and the outer cladding is silica glass containing 1000-6000ppm of fluorine. The radiation-resistant high-performance silica fiber provided by the invention can beprepared by adopting a combined process method of VAD (vapour axial deposition) and MCVD (modified chemical vapour deposition) or PCVD (plasma chemical vapour deposition), namely a core layer is prepared by adopting VAD firstly, and different deposition and vitrifaction technological conditions are controlled to obtain core rods with different hydroxyl group and fluorine contents, the inner cladding doped with fluorine is prepared by adopting an MCVD or PCVD process, a sleeve containing a low-refractive index inner cladding is obtained, and then the core rods and the obtained sleeve are fusedinto a prefabricated rod or combined into a prefabricated rod assembly, and finally direct wire drawing is carried out to obtain the silica fiber. The silica fiber can be used for information transmission of a communication system, especially can be used as both a radiation-resistant optical fiber to guarantee long-distance communication and an energy transmitting optical fiber for transmitting ultraviolet light under the radiation environment.

Description

technical field [0001] The invention relates to a silica optical fiber and a manufacturing method thereof, in particular to a radiation-resistant high-performance silica optical fiber and a manufacturing method thereof, belonging to the technical field of optical fibers. Background technique [0002] In aerospace, nuclear industry, military, biomedicine, lithography, mechanical micromachining, modern medical treatment, ultraviolet curing and other strong radiation environments, optical fiber technology has been more and more widely used. In the radiation state, the attenuation of the conventional core germanium-doped fiber increases significantly due to radiation induction, and the transmission performance deteriorates, so it is not suitable for applications in these fields. For this reason, the development of radiation-resistant optical fiber has become a research hotspot in the world. [0003] Radiation-resistant optical fiber refers to an optical fiber that can resist th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B20/00
CPCC03B2201/12C03B37/01211Y02P40/57
Inventor 吴金东李庆国孙可元吴晓彤吴雯雯何宝生刘元俊
Owner HANGZHOU FUTONG COMM TECH CO LTD
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