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Proceedings Paper

π-phase-shifted FBG for improving static-strain measurement resolution based on triangle-wave laser tuning technique
Author(s): Wenzhu Huang; Wentao Zhang; Tengkun Zhen; Ce Bian; Yanliang Du; Fang Li
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Paper 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.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91570L (2 June 2014); doi: 10.1117/12.2058298
Show Author Affiliations
Wenzhu Huang, Institute of Semiconductors (China)
Wentao Zhang, Institute of Semiconductors (China)
Tengkun Zhen, Shijiazhuang Tiedao Univ. (China)
Ce Bian, Shijiazhuang Tiedao Univ. (China)
Yanliang Du, Shijiazhuang Tiedao Univ. (China)
Fang Li, Institute of Semiconductors (China)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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