压电水听器线阵与DFB光纤水听器线阵的分析

Analysis of experimental data of the piezoelectric hydrophone and DFB fiber laser hydrophone arrays

分布反馈式(Distributed Feedback,DFB)光纤激光水听器因其多方面优越的性能近些年发展迅速,国内已对由其组成的线阵进行了成功的湖试。为检验更大规模DFB光纤激光水听器线阵的实用性能及与传统压电水听器线阵的性能区别,在某湖进行了实验,获得了传统压电水听器线阵和8元DFB光纤水听器线阵的相关数据。分析了阵元一致性并在不同的信噪比情况下比较了两种线阵的指向性性能差别。结果表明,在阵元一致性上压电阵优于光纤阵,在窄带大信噪比情况下两种水听器阵的指向性性能相似,在窄带小信噪比情况下DFB光纤激光水听器阵显示出了更好的性能。

In recent years the distributed feedback（DFB） fiber laser（FL） hydrophone has been rapidly developed due to their advantages.In China a successful lake experiment of towing array based on DFB FL hydrophones has been con-ducted.In order to evaluate the implementation of eight-element DFB FL hydrophone array and compare the perform-ance with the conventional piezoelectric hydrophone array,the lake experimental results of the two types of arrays are presented.The analysis of the consistency of hydrophone and the beam bearing in different SNR are concluded by us-ing the experimental data,which shows that the conventional hydrophone array has better consistency than the laser hydrophone array and there is similar performance of beam bearing between the two types of arrays in narrow band and high SNR condition;however,the DFB FL hydrophone array has a better performance than the conventional one in narrow band and low SNR condition.