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A rare earth ion-doped fluorotellurate optical temperature sensing fiber and its preparation method

A technology of rare earth ions and sensing optical fiber, which is applied in the field of optical fiber, can solve the problems of temperature sensitivity test accuracy drop, increase economic cost, and lower signal strength, and achieve the effects of low phonon energy, good physical properties, and high temperature sensitivity

Active Publication Date: 2021-06-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the phonon energy of this system is high, which is not conducive to upconversion fluorescence emission, which will lead to lower signal intensity and lower temperature sensitivity test accuracy. There will be higher requirements for pump light sources in application.
In addition, the preparation process of silica optical fiber requires a higher temperature, which will increase the economic cost for industrial production, and although the commercial MCVD method is used in the production of preforms, the process is complicated

Method used

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  • A rare earth ion-doped fluorotellurate optical temperature sensing fiber and its preparation method
  • A rare earth ion-doped fluorotellurate optical temperature sensing fiber and its preparation method
  • A rare earth ion-doped fluorotellurate optical temperature sensing fiber and its preparation method

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Effect test

Embodiment 1

[0042] The preparation of the rare earth ion-doped fluorotellurate optical temperature sensing fiber in this embodiment, the specific steps are as follows:

[0043] 1. Preparation of fluorotellurite-clad glass tube

[0044] (a) The cladding glass adopts the following formula, calculated by component molar ratio:

[0045] TeO 2 : 76%

[0046] ZnF 2 : 12%

[0047] KF: 12%;

[0048] (b) Take high-purity powder raw material 300g by component formula, after fully mixing in agate mortar, pour in corundum crucible, cover lid;

[0049](c) Transfer it to a 950°C high-temperature electric furnace for melting for 30 minutes, and preheat the forming mold to 300°C in an annealing furnace in advance, and transfer it to the air to cool it for a while when the glass liquid is discharged, until the viscosity is high Pour it very slowly into the preheated forming mold, and then quickly transfer the mold to the annealing furnace for annealing;

[0050] (d) Set the annealing system, keep w...

Embodiment 2

[0069] The preparation of the rare earth ion-doped fluorotellurate optical temperature sensing fiber in this embodiment, the specific steps are as follows:

[0070] 1. Preparation of fluorotellurite-clad glass tube

[0071] (a) The cladding glass adopts the following formula, calculated by component molar ratio:

[0072] TeO 2 : 76%

[0073] ZnF 2 : 12%

[0074] KF: 12%;

[0075] (b) Take high-purity powder raw material 300g by component formula, after fully mixing in agate mortar, pour in corundum crucible, cover lid;

[0076] (c) Transfer it to a 950°C high-temperature electric furnace for melting for 30 minutes, and preheat the forming mold to 300°C in an annealing furnace in advance, and transfer it to the air to cool it for a while when the glass liquid is discharged, until the viscosity is high Pour it very slowly into the preheated forming mold, and then quickly transfer the mold to the annealing furnace for annealing;

[0077] (d) Set the annealing system, keep ...

Embodiment 3

[0095] The preparation of the rare earth ion-doped fluorotellurate optical temperature sensing fiber in this embodiment, the specific steps are as follows:

[0096] 1. Preparation of fluorotellurite-clad glass tube

[0097] (a) The cladding glass adopts the following formula, calculated by component molar ratio:

[0098] TeO 2 : 84%

[0099] ZnF 2 :8%

[0100] KF: 8%;

[0101] (b) take high-purity powder raw material 400g by component formula, after fully mixing in agate mortar, pour in corundum crucible, cover lid;

[0102] (c) Transfer it to a high-temperature electric furnace at 920°C for melting for 40 minutes. At the same time, preheat the forming mold to 300°C in the annealing furnace in advance. When the glass liquid is discharged, first transfer it to the air and cool it for a while. Pour it very slowly into the preheated forming mold, and then quickly transfer the mold to the annealing furnace for annealing;

[0103] (d) Set the annealing system, keep warm at 3...

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Abstract

The invention discloses a rare earth ion-doped fluorotellurate optical temperature sensing optical fiber, the cladding glass of the optical fiber is fluorotellurate glass; the core glass of the optical fiber is fluorotellurate doped with rare earth ions For glass, the dopant ions are rare earth ions with thermally coupled energy levels that can be used for upconversion. The invention also discloses a preparation method of the rare earth ion-doped fluorotellurate optical temperature sensing optical fiber, which includes the steps of burning bulk cladding glass, preparing a core glass rod, preparing a prefabricated rod, and drawing a wire. The optical fiber of the present invention combines the excellent anti-electromagnetic interference performance, fast response, and strong applicability in harsh environments of the optical temperature measurement method with the low phonon energy, good physical properties, and excellent optical properties of the fluorotellurite glass system, It has a very great application prospect in temperature monitoring in power system, aerospace, construction, chemical industry, medical treatment and many other industries.

Description

technical field [0001] The invention relates to the field of optical fiber technology, in particular to a rare earth ion-doped fluorotellurate optical temperature sensing optical fiber and a preparation method thereof. Background technique [0002] Temperature is closely related to our lives. In many cases, it is necessary to monitor the temperature in some small, remote, harsh or inaccessible spaces to achieve control of various processes. Traditional contact temperature sensors It is difficult to be competent for the application of the above scenarios. In contrast, a method based on optics for measuring temperature has shown obvious advantages, because it does not need to be in direct contact with the measured target or can be measured after reaching temperature equilibrium, and on the other hand, the optical fiber is an optical signal transmission method. Because of its advantages of mechanical flexibility, low heat, immunity to electromagnetic interference, easy recepti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C13/04C03B37/027
CPCC03B37/027C03C13/048
Inventor 邱建荣郝应心马志军吕时超
Owner SOUTH CHINA UNIV OF TECH
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