2 June 2014 π-phase-shifted FBG for improving static-strain measurement resolution based on triangle-wave laser tuning technique
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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.
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Wenzhu Huang, Wenzhu Huang, Wentao Zhang, Wentao Zhang, Tengkun Zhen, Tengkun Zhen, Ce Bian, Ce Bian, Yanliang Du, Yanliang Du, Fang Li, 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); doi: 10.1117/12.2058298; https://doi.org/10.1117/12.2058298
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