5 October 2009 An ultrahigh resolution FBG dynamic strain sensing system with eigenvector spectrum analysis method
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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75032U (2009) https://doi.org/10.1117/12.835334
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom
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.
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Zeng-Ling Ran, Zeng-Ling Ran, Yun-Jiang Rao, Yun-Jiang Rao, Jing Lu, Jing Lu, } "An ultrahigh resolution FBG dynamic strain sensing system with eigenvector spectrum analysis method", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75032U (5 October 2009); doi: 10.1117/12.835334; https://doi.org/10.1117/12.835334
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