光纤水听器在**应用中有着重要地位，阐述了芯轴型-含空气腔式光纤水听器的传感原理，并对其声压灵敏度参数进行了研究。通过建立有限元模型，分析了其结构以及弹性层参数对声压灵敏度的影响。设计了一种光纤水听器，并对其声压灵敏度和谐振进行分析，仿真结果表明其在500 Hz ～ 9 kHz 的工作区间内可以达到高于-140 dB 的声压灵敏度，此种光纤水听器可用于拖曳线列阵。

Optical fiber hydrophone is essential for military applications. The principle of air-backed optical fiber mandrel hydrophone is outlined in this paper，and its sensitivity is investigated as well. Finite element method（FEM）is applied to analyze influence of structural characteristics and elastic layer parameters on pressure-sensitivity of hydrophone. An optical fiber hydrophone is designed with analysis on its sensitivity and resonance. The simulation results show that the hydrophone works at frequency range between 500 Hz to 9 kHz with over -140 dB of pressure-sensitivity. This study leads application of the hydrophone for towed linear hydrophone arrays.