supported by the National Natural Science Foundation of China(No.61775057);the Natural Science Foundation of Hebei Province of China(Nos.E2015502053 and F2015502059)
Distributed optical fiber sensor based on Brillouin scat- tering was fn'st proposed by Farahi et al in 1989[1], and has attracted intense interest due to the potential applica- tion in monitoring large civil structur...