中文摘要：

一个短洞分布式的反馈(DFB ) 纤维激光被用于低频率声学的信号察觉。有不同中央波长的三 DFB 纤维激光一起被锁住与合适的敏感改进设计做三元素的向量水中听音器，它有广泛、重要的应用到为国家防卫的在水下的声学的监视，油，煤气的探索等等。由波长阶段解调，在不同频率信号下面的放射激光的波长变化能被解释，并且敏感被测试大约 33 dB re pm/g。频率反应范围从 5 Hz 是相当扁平的到 300 Hz。

英文摘要：

A short cavity distributed feedback （DFB） fiber laser is used for low frequency acoustic signal detection. Three DFB fiber lasers with different central wavelengths are chained together to make three-element vector hydrophone with proper sensitivity enhancement design, which has extensive and significant applications to underwater acoustic monitoring for the national defense, oil, gas exploration, and so on. By wavelength-phase demodulation, the lasing wavelength changes under different frequency signals can be interpreted, and the sensitivity is tested about 33 d13 re pm/g. The frequency response range is rather fiat from 5 Hz to 300Hz.