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光纤矢量水听器(FOVH)以其低频灵敏度高,动态范围大,抗电磁干扰,易轻型化等诸多优势,成为新型矢量水听器的一个发展热点。针对线阵列应用,开展了光纤干涉碟型矢量水听器的仿真分析和研制工作。有限元分析采用光纤等效层方法(FLEM)和光纤细化结构方法(FLDM)分别对系统的性能进行预报,研制出了光纤碟型矢量水听器样品,并进行了全面的测试。实验结果表明,所研制的矢量水听器样品在100~1000 Hz的工作频带内,矢量通道的等效声压相移灵敏度为-182 d B@100 Hz~-158.5 d B@1000 Hz(ref.1 rad/μPa),串扰小于-30 d B,有良好的矢量性。
Fiber optic hydrophone (FOVH) has become a hotspot in the development of new vector hydrophone due to its advantages of high frequency sensitivity, large dynamic range, anti-electromagnetic interference and easy light weight. Aiming at the application of line array, the simulation analysis and research work of optical interference disk type vector hydrophone are carried out. Finite element analysis (FDM) method and FLDM (Fiber Optic Equivalent Layer Method) were used to predict the performance of the system respectively. The samples of optical fiber hydrophone were developed and tested thoroughly. The experimental results show that the equivalent acoustic pressure-phase shift sensitivity of the vector hydrophone sample is -182 dB in the operating frequency band of 100-1000 Hz, and the sensitivity of the vector hydrophone is -182 dB @ 100 Hz -158.5 dB @ 1000 Hz (ref .1 rad / μPa), crosstalk less than -30 d B, good vector.