Eliminating the influence of polarization instability using time-wavelet energy spectrum for FBG-FP static-strain sensing

Wenzhu Huang; Wentao Zhang; Tengkun Zhen; Fusheng Zhang; Fang Li

doi:10.1117/12.2058297

2 June 2014 Eliminating the influence of polarization instability using time-wavelet energy spectrum for FBG-FP static-strain sensing

Wenzhu Huang, Wentao Zhang, Tengkun Zhen, Fusheng Zhang, Fang Li

Author Affiliations +

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91570K (2014) https://doi.org/10.1117/12.2058297
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

The fluctuation of polarization may cause wrong demodulation results in high-resolution static-strain sensing based on FBG-FP. This paper presents a polarization-insensitive demodulation algorithm using time-wavelet energy spectrum for single mode fiber (SMF) based FBG-FP sensor. This method can eliminate the influence of polarization instability effectively. Time-wavelet energy spectrum is calculated to get the energy distribution of the reflectance spectrums of FBG-FP on the timeline. The maximum value of the energy distribution is used to obtain the strain signal. In the laboratory, a high-resolution strain demodulation result without polarization controller is obtained.

Citation Download Citation

Wenzhu Huang, Wentao Zhang, Tengkun Zhen, Fusheng Zhang, and Fang Li "Eliminating the influence of polarization instability using time-wavelet energy spectrum for FBG-FP static-strain sensing", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91570K (2 June 2014); https://doi.org/10.1117/12.2058297

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