A four-element hydrophone array system using a fiber Bragg grating laser system is described. The demodulation technique for the array combines a 3 X 3 coupler-based interferometer and three wavelength division multiplexers (WDMs). It is believed to be a new passive approach to use a WDM and a unique arithmetic method. The operational frequency limit depends only on the frequency of its electronic portion. The designed system has achieved a minimum of approx7.2 X 10~(-7) pm/(Hz)~(1/2) detectable wavelength perturbation for frequencies that are greater than 200 Hz.
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机译:描述了使用光纤布拉格光栅激光系统的四元件水听器阵列系统。该阵列的解调技术结合了一个基于3 X 3耦合器的干涉仪和三个波分复用器(WDM)。人们相信这是使用WDM和独特的算术方法的一种新的被动方法。工作频率限制仅取决于其电子部分的频率。对于大于200 Hz的频率,所设计的系统已实现至少约7.2 X 10〜(-7)pm /(Hz)〜(1/2)的可检测波长扰动。
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