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Proceedings Paper

An ultrahigh resolution FBG dynamic strain sensing system with eigenvector spectrum analysis method
Author(s): Zeng-Ling Ran; Yun-Jiang Rao; Jing Lu
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Paper Abstract

An in-fiber Bragg grating (FBG) dynamic strain sensing system based on a fiber ring laser configuration and the Eigenvector spectrum analysis method, is proposed and demonstrated. An ultrahigh dynamic strain resolution of 5x10-5 nε /Hz1/2 is achieved due to both the use of the supper white-noise suppression ability of the advanced spectrum analysis method and the high optical signal-to-noise ratio (SNR) (~65dB) of the sensing signal generated by the fiber ring laser scheme. This is the highest dynamic strain resolution achieved so far for a single FBG sensor at frequency of <100Hz, to the best of our knowledge.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75032U (5 October 2009); doi: 10.1117/12.835334
Show Author Affiliations
Zeng-Ling Ran, Univ. of Electronics Science & Technology (China)
Yun-Jiang Rao, Univ. of Electronics Science & Technology (China)
Jing Lu, Univ. of Electronics Science & Technology (China)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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