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A radiation-resistant optical fiber and its preparation process

A technology of anti-radiation and anti-radiation layer, which is applied in the direction of cladding optical fiber, multi-layer core/clad optical fiber, optics, etc., can solve the problems that have not been fundamentally solved, and achieve the goal of eliminating radiation interference and ensuring application safety Effect

Active Publication Date: 2019-12-27
上海傲世控制科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scholars in Western developed countries have made some improvements to this, but they have not fundamentally solved the problem, and only keep it secret from China

Method used

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  • A radiation-resistant optical fiber and its preparation process
  • A radiation-resistant optical fiber and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A radiation-resistant optical fiber, such as figure 1 As shown, it includes an optical fiber outer coating 1, an optical fiber inner coating 2, a quartz cladding 3, an anti-radiation layer 4, a stress region 7, an inner cladding 6 and a fiber core 5 arranged from outside to inside, wherein the quartz cladding 3 It is the outer cladding, wherein the outer coating is a polymeric organic compound doped with ions of variable valence metal elements, and the content is at the ppm level, wherein the optical fiber outer coating 1 contains 500ppm EuO, and the optical fiber inner coating 2 contains 400ppm EuO CeO 2 , containing 200ppm TiO in the anti-radiation layer 4 2 and used to compare the refractive index of the radiation resistant layer 4 with SiO 2 Flat fluorine, the core 5 contains Er with a mass ratio of 3:1 2 o 3 and CeO 2 and GeO to increase the refractive index of the core 2 , where CeO 2 The content is 600ppm, GeO 2 The content is 300ppm.

[0027] The concre...

Embodiment 2

[0037] This embodiment is basically the same as Embodiment 1, except that the optical fiber structure of this embodiment does not include the stress zone 7 . The invention adds materials capable of anti-radiation effect to the outer layer coating, the outer cladding layer and the fiber core to form three anti-radiation defense lines, which can effectively resist the radiation.

Embodiment 3

[0039] This embodiment is similar to the steps of embodiment 1, by controlling the flow rate of the gaseous raw material that is introduced to generate deposits, the optical fiber outer coating 1 of the prepared optical fiber contains 200ppm Ce 2 o 3 , the fiber inner coating 2 contains 600ppm of PbO, and the anti-radiation layer 4 contains 300ppm of CeO 2 and used to compare the refractive index of the radiation resistant layer 4 with SiO 2 Flat fluorine, the core 5 contains Yb with a mass ratio of 3:1 2 o 3 and CeO 2 and GeO to increase the refractive index of the core 2 , where CeO 2 The content is 300ppm, GeO 2 The content is 400ppm.

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Abstract

The invention relates to an anti-radiation optical fiber, including an outer coating, an outer cladding, an inner cladding and a fiber core. The outer coating comprises an oxide having 200 to 1000 ppm of a variable valent metal element. The outer cladding is formed with an oxide containing 200 to 500 ppm of a variable valent metal element and an anti-radiation layer of fluorine for leveling out refractive indexes of the outer cladding and SiO2. The fiber core comprises an oxide of 300 to 800 ppm of a variable valent metal element deposited simultaneously with a main dopant. Compared with the prior art, the invention has the advantages of having strong anti-interference ability and the like via three anti-radiation lines and can ensure the safety application of various optical fibers.

Description

technical field [0001] The invention relates to the field of optical fibers, in particular to a radiation-resistant optical fiber and a preparation process thereof. Background technique [0002] Communication optical fiber has been used all over the world and has been used for billions of kilometers. It has been proved by decades of practice that it is not sensitive to radiation in a normal radiation environment. However, optical fiber sensors (fiber optic gyroscopes, fiber optic hydrophones) made of special optical fibers, such as line polarization-maintaining fibers and circular polarization-maintaining fibers, such as precision measurements used in nuclear sites, underwater monitoring and satellite navigation, must consider the radiation zone. serious consequences to come. The current fiber amplifiers prepared by rare earth-doped optical fibers and fiber lasers are extremely sensitive to the radiation environment. This is because the rare earth macromolecular oxides are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/036
CPCG02B6/03622G02B6/03694
Inventor 申云华王毅强
Owner 上海傲世控制科技股份有限公司
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