π-phase-shifted FBG for improving static-strain measurement resolution based on triangle-wave laser tuning technique

Wenzhu Huang; Wentao Zhang; Tengkun Zhen; Ce Bian; Yanliang Du; Fang Li

doi:10.1117/12.2058298

2 June 2014 π-phase-shifted FBG for improving static-strain measurement resolution based on triangle-wave laser tuning technique

Wenzhu Huang, Wentao Zhang, Tengkun Zhen, Ce Bian, Yanliang Du, Fang Li

Author Affiliations +

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91570L (2014) https://doi.org/10.1117/12.2058298
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

In this paper, π-phase-shifted FBG (π-FBG) is used for high-resolution static-strain sensing. A novel laser tuning technique based on triangle-wave voltage driver is proposed to improve wavelength scanning stability of tunable laser. And a static-strain demodulation algorithm based Gauss curve fitting and peak detection is tested. As the reflectance spectrum of π-FBG have high signal-to-noise ratio, a static-strain resolution of 0.83 nε is obtained in a vacuum environment, which shows that the proposed system have a good application prospect for geophysics applications.

Citation Download Citation

Wenzhu Huang, Wentao Zhang, Tengkun Zhen, Ce Bian, Yanliang Du, and Fang Li "π-phase-shifted FBG for improving static-strain measurement resolution based on triangle-wave laser tuning technique", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91570L (2 June 2014); https://doi.org/10.1117/12.2058298

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