23 April 2017 Wide-range dynamic strain measurements based on K-BOTDA and frequency-agile technique
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Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103237U (2017) https://doi.org/10.1117/12.2265378
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of
Abstract
We propose and demonstrate a novel fast Brillouin optical time-domain analysis system using the coefficient K spectrum which is defined as the ratio of phase-shift and gain of Brillouin amplification, where K features linear response, immune to the variation of pump power and a wide measure range. For a 30ns-square pump pulse, the frequency span of K spectrum can reach up to 200MHz. In dynamic strain experiment, a multi-slope assisted K-BOTDA with the measured strain of 5358.3με and the vibration frequency of 6.01Hz and 12.05Hz are demonstrated.
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Dengwang Zhou, Yongkang Dong, Benzhang Wang, Hongying Zhang, Zhiwei Lu, "Wide-range dynamic strain measurements based on K-BOTDA and frequency-agile technique", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103237U (23 April 2017); doi: 10.1117/12.2265378; https://doi.org/10.1117/12.2265378
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