Abstract
A Brillouin-based distributed optical fiber dynamic strain sensor is described which converts strain-induced Brillouin frequency shift into optical intensity variations by using an imbalanced Mach–Zhender interferometer. A coupler is used at the output of this interferometer to permit differentiate and cross multiply demodulation. The demonstrated sensor is capable of probing dynamic strain disturbances over 2 km of sensing length every 0.5 s up to a strain of 10 mε with an accuracy of and spatial resolution of 1.3 m.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Feng Wang, Xuping Zhang, Xiangchuan Wang, and Haisheng Chen
Opt. Lett. 38(14) 2437-2439 (2013)
Dexin Ba, LiQiang Qiu, Qi Chu, Yulin Pei, Dianyang Lin, and Yongkang Dong
Opt. Lett. 47(22) 5777-5780 (2022)
M. Taki, A. Signorini, C. J. Oton, T. Nannipieri, and F. Di Pasquale
Opt. Lett. 38(20) 4162-4165 (2013)