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FP cavity and FBG cascaded optical fiber temperature and pressure sensor

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摘要

A fiber Bragg grating (FBG) and Fabry-Perot (FP) cavity cascaded fiber sensing system was manufactured for temperature and pressure sensing. Temperature high up to 175 ℃ sensing was performed by FBG for the linear variation of FBG wavelength with temperature. After temperature was sensed, the demodulation system can find the original FP cavity length and its pressure-cavity length correlation coefficient, thus the ambient pressure would be calculated. The sensing pressure can be as high as 100 MPa with a repeatability of 1/10000 and high stability. This kind of fiber sensor has been used in Shengli Oil Field.

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作者单位:

    Shandong Key Laboratory of Optical Fiber Sensing Technologies, Laser Institute, Qilu University of Technology(Shandong Academy of Sciences)
    Shandong Key Laboratory of Optical Fiber Sensing Technologies, Laser Institute, Qilu University of Technology(Shandong Academy of Sciences)

引用该论文

Li Hui,Zhao Qingchao,Jiang Shaodong,Ni Jiasheng,Wang Chang. FP cavity and FBG cascaded optical fiber temperature and pressure sensor[J].Chinese Optics Letters,2019,17(4):04.