High-sensitivity high-temperature optical fiber sensor made of pure quartz material and preparation method

A high-temperature sensor and high-sensitivity technology, which is applied to thermometers, instruments, optics, etc. with physical/chemical changes, to achieve the effect of simple preparation method, good stability and high sensitivity

Pending Publication Date: 2020-04-10
XIAMEN UNIV
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Problems solved by technology

However, since the sensing structure uses a common doped single-mode fiber, its maximum measurement temperature is limited to 1050°C

Method used

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  • High-sensitivity high-temperature optical fiber sensor made of pure quartz material and preparation method
  • High-sensitivity high-temperature optical fiber sensor made of pure quartz material and preparation method
  • High-sensitivity high-temperature optical fiber sensor made of pure quartz material and preparation method

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Embodiment Construction

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] Such as figure 1 As shown, this embodiment includes a hollow-core photonic crystal fiber 2, which is made of pure silica material; one end of the hollow-core photonic crystal fiber 2 is fused to a single-mode fiber 1, and the hollow-core photonic crystal fiber 2 At the other end, a tiny pure quartz solid tip 3 with a pore collapse formed by arc discharge.

[0025] A welding surface is formed between the single-mode fiber 1 and the hollow-core photonic crystal fiber 2, and the welding surface forms two resonant cavities with the two end surfaces of the pure silica solid tip 3 area, thereby generating the Vernier effect. The cavity length difference of the resonant cavity is controlled by the size of the ...

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Abstract

A high-sensitivity high-temperature optical fiber sensor made of a pure quartz material and a preparation method relates to the field of high-temperature detection. The high-sensitivity high-temperature optical fiber sensor comprises a hollow-core photonic crystal fiber made of the pure quartz material, wherein one end of the hollow-core photonic crystal fiber is welded with a single-mode opticalfiber; the other end of the hollow-core photonic crystal fiber forms a tiny pure quartz solid tip with a collapsed air hole through arc discharge; a face of weld is formed between the single-mode optical fiber and the hollow-core photonic crystal fiber; the face of weld and two end surfaces of a pure quartz solid tip region respectively form two resonant cavities so as to generate a Vernier effect; and the cavity length difference of the two resonant cavities is regulated and controlled through the size of the pure quartz solid tip. The sensor has the advantages of high sensitivity, compact structure, simple manufacturing, good stability and the like, and has a wide application prospect in the field of high-temperature detection.

Description

Technical field [0001] The invention relates to the field of high temperature detection, in particular to a high-sensitivity optical fiber high-temperature sensor composed of pure quartz material and a preparation method. Background technique [0002] Compared with traditional electrical products, optical fiber high temperature sensors have unique advantages. However, when traditional core doped optical fibers are used for high temperature detection, the core doped ions (such as germanium, boron, phosphorus, etc.) are unstable at high temperatures. Diffusion will occur and change the transmission characteristics of the optical fiber. The photonic crystal fiber (PCF) made of undoped pure silica material can be used in a higher temperature environment (> It is stable under 1000℃) and has been used for high temperature sensing measurement [1]. However, the sensitivity of the interference spectrum wavelength detection scheme using a single-segment sensing fiber is low, and by casc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G02B6/255
CPCG01K11/32G02B6/2551G02B6/2552
Inventor 董小鹏雷雪琴
Owner XIAMEN UNIV
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