图12 光纤矢量水听器海试结果。左为脉冲信号波形及频谱，右为测向结果。
Fig.12 Test results of FOVH on sea. Waveform and its power spectrum(left) and direction finding(right).
4 应用前景
光纤矢量水听器适用于单点测量获取海洋水下声学三维矢量信息和一维声压信息，为解决浅海低频的水声研究和应用的许多问题提供了理想的技术途径，从而在以下一些重要的领域展示了广阔的应用前景：(1) 岸基固定海域水下声场探测；(2) 潜艇或水面舰艇拖曳阵列；(3) 机动阵列、声纳浮标、潜标等；(4) UUV、鱼雷、自主攻击水雷等小平台为载体的水声探测；(5) 石油、天然气勘探中的地震波检测。
参考文献：
[1] 熊水东. 光纤矢量水听器研究[D]. 长沙：国防科大博士学位论文，2003年.
[2] 贾志富. 三维同振球型矢量水听器的特性及其结构设计[J]. 应用声学,2001,Vol.20(4):15-20. [3] 孙贵青, 李启虎. 声矢量传感器研究进展[J]. 声学学报，2004，Vol.29(6): 481～490.
Development of fiber optic vector Hydrophone
Ni Ming, Zhang Zhenyu, Meng Zhou, Hu Yongming
(College of Photo-electric Science and Engineering, National University of Defense Technology,
Changsha, 410073, Hunan, China)
Abstract: Introduced the principle of fiber optic vector hydrophone and how it detected of sound vibration velocity and development of vector hydrophone in those years. We fabricated some units of fiber optic vector hydrophone, whose diameter was ?110mm. Test showed its acceleration sensitivity was above 35dB(ref 1rad/g) over the operating flat frequency range from 20 to 2000 Hz, its directional response presented its natural “8” and work depth was above 500m. Sea test result showed that fiber optic vector hydrophone can pick-up underwater acoustic and realizes direction finding of object. At last, we implied a great future for application. Key words: fiber vector hydrophone, vector hydrophone.