光栅法布里-珀罗腔干涉型水听器系统内的时域串扰严重限制了其实际应用，因此，对系统内时域串扰的产生机理进行分析，讨论在相位产生载波(PGC)解调方法下干涉信号的幅度对其相位信息的影响，并制作了两组不同反射率光栅水听器进行对比实验。实验表明，高反射率(R=0.6)光栅系统时分串扰明显，串扰信号在满足PGC解调能力的基础上其相位信息不会明显衰减；低反射率(R=0.02)光栅实现了34 dB的串扰抑制。进一步研究发现，低反射率光栅系统中的串扰主要由前端水听器单元外加信号引起的多普勒效应噪声和时分串扰噪声组成。

Time domain crosstalk in fiber Bragg grating Fabry-Pérot (F-P) interferometric hydrophone array system limits its practical application seriously. So it is necessary to analyze the generating mechanism of time domain crosstalk. With the phase generator carrier (PGC) demodulation, the effect of amplitude on phase is discussed for the interference signal. Then two comparative hydrophone systems with different reflectivities of fiber Bragg grating are fabricated and tested. Experimental results show that amplitude of the crosstalk is high for the demodulation signal with high reflectivity of grating (R=0.6), because the phase of the crosstalk signal hardly reduces on the basis of the PGC demodulation. On the other hand, the crosstalk has about 34 dB suppression with the low reflectivity of grating (R=0.02). Furthermore, the crosstalk in low reflectivity grating system is verified to be composite of the Doppler noise of precedent hydrophones and time domain crosstalk.