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Proceedings Paper

Realization of nano-order static strain resolution in FBG sensors using narrow linewidth tunable laser sources: theoretical analysis
Author(s): Qingwen Liu; Zuyuan He; Tomochika Tokunaga; Kazuo Hotate
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Paper Abstract

The resolution of FBG static strain sensor interrogated with a narrow linewidth tunable laser is theoretically analyzed. The main noise sources of the sensor are analyzed. The expression of the resolution is deduced with crosscorrelation algorithm. The calculated resolution agrees well with previous experimental result, and the analysis is further validated by numerical simulation. Based on the deduced expression of resolution, the guidelines to optimize the sensor for realization of high resolution are given in detail. It is shown that with properly designed FBG and interrogation system, nano-order static strain resolution can be realized as we demonstrated in experiment recently.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77537P (17 May 2011); doi: 10.1117/12.885106
Show Author Affiliations
Qingwen Liu, The Univ. of Tokyo (Japan)
Zuyuan He, The Univ. of Tokyo (Japan)
Tomochika Tokunaga, The Univ. of Tokyo (Japan)
Kazuo Hotate, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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