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文中提出了一种光纤分布式声波传感方案.作用在传感光纤上的声波信号导致后向瑞利散射光的相位变化,将含有声波信息的后向瑞利散射信号注入到迈克尔逊干涉仪,并采用相位载波解调算法解调出相位信息.实验中采用压电拉伸器模拟声波振动,分布式声波传感系统实现了10m的空间分辨率以及平坦的频响.“,”A distributed acoustic sensing (DAS) scheme was presented.Rayleigh backscattered light which contained acoustic signal induced phase changes along the sensing fiber was fed into a Michelson interferometer,the phase changes were demodulated by the Phase Generated Carrier technology.A piezoelectric simulation experiment of acoustic vibration was designed.The DAS system realized 10 m location resolution of the acoustic source,and the flat frequency response through the experiment.