Method for testing temperature and air pressure of an FBG combined with optical fiber microsphere
A femtosecond laser and testing method technology, applied in the direction of physical/chemical change thermometers, fluid pressure measurement using optical methods, thermometers, etc., can solve the problems of unable to detect pressure, and achieve the measurement and expansion of temperature and air pressure Sensing parameters, high reliability effect
Inactive Publication Date: 2021-04-30
BEIJING INFORMATION SCI & TECH UNIV
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Problems solved by technology
Ordinary fiber optic FBG sensors have a cylindrical structure and cannot directly detect the pressure of the environment to be measured
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[0026] The objects and functions of the present invention and methods for achieving the objects and functions will be clarified by referring to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of the description is only to help those skilled in the relevant art comprehensively understand the specific details of the present invention.
[0027] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.
[0028] The invention relates to a method for testing temperature and air pressure of a femtosecond laser directly writing a Bragg Grating (Fiber Bragg Grating, FBG) combined with an optical fiber microsphere. The sensor is mainly composed of FBG prepared by femtosecond laser and optical fi...
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The invention relates to a method for testing the temperature and the air pressure of an FBG (Fiber Bragg Grating) combined with an optical fiber microsphere. The sensor is mainly composed of an FBG prepared by femtosecond laser and an optical fiber microsphere structure prepared by combining chemical corrosion with arc discharge, and can realize simultaneous measurement of temperature and air pressure. The femtosecond laser direct writing FBG manufactured by adopting the technical scheme provided by the invention is combined with an optical fiber microsphere temperature and air pressure sensor to form an all-optical fiber structure, electromagnetic interference can be avoided, high temperature resistance is realized, and simultaneous measurement of temperature and refractive index can be realized. Meanwhile, the structure and the manufacturing process are simple, the reliability is good, and the sensitivity is high.
Description
technical field [0001] The invention belongs to the field of optical fiber sensor devices, in particular to a method for testing temperature and air pressure of femtosecond laser direct writing FBG combined with optical fiber microspheres. Background technique [0002] Optical fiber sensors have many excellent characteristics, which can realize measurement work in complex environments and have a very wide range of application values. It has the characteristics of anti-electromagnetic interference, anti-radiation, high sensitivity, light weight, insulation explosion-proof, corrosion resistance, etc., and the fiber size is small, with good optical transmission performance. Fiber Bragg Grating (FBG) is a common sensor device, which has the advantages of simple structure, small size, large dynamic range, and high sensitivity. It is widely used in aerospace, bridge water conservancy, perimeter security, biomedicine and other important fields. extensive attention. FBG is a grati...
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IPC IPC(8): G01K11/32G01L11/02G02B6/02
CPCG01K11/32G01L11/025G02B6/02123
Inventor 张雯祝连庆何巍董明利李红庄炜何彦霖
Owner BEIJING INFORMATION SCI & TECH UNIV