Author:
Yu Xinfeng,Guo Huapeng,Ye Zhigeng,Xu Pengbai,Yu Zhangjun,Wen Kunhua,Yang Jun,Qin Yuwen
Abstract
0.01 Hz low-frequency acoustic wave detection over 92 km sensing fiber based on chirped-pulse φ-OTDR is demonstrated with distributed Raman amplification and 32 averages. The strain sensitivity is 8.5 nε/Hz1/2.