High-resolution high-sensitivity and truly distributed optical frequency domain reflectometry for structural crack detection

Wenhai Li; Xiaoyi Bao; Liang Chen

doi:10.1117/12.2058532

2 June 2014 High-resolution high-sensitivity and truly distributed optical frequency domain reflectometry for structural crack detection

Wenhai Li, Xiaoyi Bao, Liang Chen

Author Affiliations +

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91579T (2014) https://doi.org/10.1117/12.2058532
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

Optical Frequency Domain Reflectometry (OFDR) with the use of polarization maintaining fiber (PMF) is capable of distinguishing strain and temperature, which is critical for successful field applications such as structural health monitoring (SHM) and smart material. Location-dependent measurement sensitivities along PMF are compensated by cross- and auto-correlations measurements of the spectra form a distributed parameter matrix. Simultaneous temperature and strain measurement accuracy of 1μstrain and 0.1°C is achieved with 2.5mm spatial resolution in over 180m range.

Citation Download Citation

Wenhai Li, Xiaoyi Bao, and Liang Chen "High-resolution high-sensitivity and truly distributed optical frequency domain reflectometry for structural crack detection", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91579T (2 June 2014); https://doi.org/10.1117/12.2058532

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