An ultrahigh resolution FBG dynamic strain sensing system with eigenvector spectrum analysis method

Zeng-Ling Ran; Yun-Jiang Rao; Jing Lu

doi:10.1117/12.835334

5 October 2009 An ultrahigh resolution FBG dynamic strain sensing system with eigenvector spectrum analysis method

Zeng-Ling Ran, Yun-Jiang Rao, Jing Lu

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 /Hz^1/2 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.

Citation Download Citation

Zeng-Ling Ran, Yun-Jiang Rao, and 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); https://doi.org/10.1117/12.835334

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