Realization of nano-order static strain resolution in FBG sensors using narrow linewidth tunable laser sources: theoretical analysis

Qingwen Liu; Zuyuan He; Tomochika Tokunaga; Kazuo Hotate

doi:10.1117/12.885106

17 May 2011 Realization of nano-order static strain resolution in FBG sensors using narrow linewidth tunable laser sources: theoretical analysis

Qingwen Liu, Zuyuan He, Tomochika Tokunaga, Kazuo Hotate

Author Affiliations +

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77537P (2011) https://doi.org/10.1117/12.885106
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

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.

Citation Download Citation

Qingwen Liu, Zuyuan He, Tomochika Tokunaga, and Kazuo Hotate "Realization of nano-order static strain resolution in FBG sensors using narrow linewidth tunable laser sources: theoretical analysis", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77537P (17 May 2011); https://doi.org/10.1117/12.885106

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