Study on polarization maintaining fiber Bragg grating strain sensor

Sun Yudan

doi:10.5768/JAO201839.0608001

Journal of Applied Optics > 2018 > 39(6): 942-946. > DOI: 10.5768/JAO201839.0608001

Sun Yudan. Study on polarization maintaining fiber Bragg grating strain sensor[J]. Journal of Applied Optics, 2018, 39(6): 942-946. DOI: 10.5768/JAO201839.0608001

Citation:

Sun Yudan. Study on polarization maintaining fiber Bragg grating strain sensor[J]. Journal of Applied Optics, 2018, 39(6): 942-946. DOI: 10.5768/JAO201839.0608001

Citation:

Sun Yudan. Study on polarization maintaining fiber Bragg grating strain sensor[J]. Journal of Applied Optics, 2018, 39(6): 942-946. DOI: 10.5768/JAO201839.0608001

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Study on polarization maintaining fiber Bragg grating strain sensor

Sun Yudan

School of Mechatronics Engineering, Daqing Normal University, Daqing 163712, China

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Received Date: June 25, 2018
Revised Date: July 16, 2018

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Abstract

Abstract

The special polarization maintaining fiber Bragg grating(PMFBG) with fusion spliced joint was proposed to overcome the cross-sensitivity of the temperature and the axial stain. The structure introduced a bulge by splicing the two fibers, then the FBG was inscribed symmetrically in the middle of the fusion spliced joint. The special PMFBG was manufactured by panda polarization-maintaining fiber and the reflection spectra was measured under 0~2N axial stress. It is found that the reflection spectra of the fast and slow axis split to two peaks respectively and shift towards the longer wavelength side with increasing axial stress, the ratio of the peaks decreases at the same time and is not affected by the temperature. Moreover, the axial strain character of the structure was simulated by the finite element method, and the reflection spectra of the PMFBG were calculated by the transfer matrix method. The simulation and experimental results are in good agreement, verifying that the peak ratio of the PMFBG reflection spectrum can be used to eliminate the cross-sensitivity of axial strain and temperature, and the measurement of axial strain can be realized.
- polarization maintaining fiber grating,
- strain sensor,
- splicing joint,
- temperature insensitive

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References (13)

References

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Study on polarization maintaining fiber Bragg grating strain sensor