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Rare earth ion doped fluorotellurite optical temperature sensing optical fiber and preparation method thereof

A rare earth ion, sensing fiber technology, applied in the field of optical fiber, can solve the problems of decreased temperature sensitivity test accuracy, increased economic cost, low signal strength, etc., and achieves the effects of good physical properties, good structure, and high temperature sensitivity

Active Publication Date: 2018-09-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Rare earth ion doped fluorotellurite optical temperature sensing optical fiber and preparation method thereof
  • Rare earth ion doped fluorotellurite optical temperature sensing optical fiber and preparation method thereof
  • Rare earth ion doped fluorotellurite optical temperature sensing optical fiber and preparation method thereof

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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 it at 300...

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Abstract

The invention discloses a rare earth ion doped fluorotellurite optical temperature sensing optical fiber. Cladding glass of the optical fiber is fluorotellurite glass; and fiber core glass of the optical fiber is rare earth ion doped fluorotellurite glass, and doped ions are rare earth ions which have a thermally- coupled energy level and can be used for upconversion. The invention further discloses a preparation method of the rare earth ion doped fluorotellurite optical temperature sensing optical fiber, and the preparation method comprises the steps: firing a large piece of cladding glass; preparing a fiber core glass rod; preparing a perform rod; and carrying out wiredrawing by using a wiredrawing tower. The optical fiber disclosed by the invention is combined with the excellent antielectromagentic interference properties, rapid response properties and high severe environment adaptability of an optical thermometry as well as the low phonon energy, good physical properties and excellent optical properties of a fluorotellurite glass system so as to have a very huge application prospect on the aspect of temperature monitoring in multiple industries and fields such as power systems,aerospace, buildings, chemical industry and medical treatment.

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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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