Wide-range dynamic strain measurements based on K-BOTDA and frequency-agile technique

Dengwang Zhou; Yongkang Dong; Benzhang Wang; Hongying Zhang; Zhiwei Lu

doi:10.1117/12.2265378

23 April 2017 Wide-range dynamic strain measurements based on K-BOTDA and frequency-agile technique

Dengwang Zhou, Yongkang Dong, Benzhang Wang, Hongying Zhang, Zhiwei Lu

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.

Citation Download Citation

Dengwang Zhou, Yongkang Dong, Benzhang Wang, Hongying Zhang, and 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); https://doi.org/10.1117/12.2265378

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