光纤光栅水听器波长解调技术的研究  

The Study Of Demodulation Technique On The Hydrophone Based On Fbg

作　　者：胡勇勤[1] 王俊杰[2] 罗裴[2] 

机构地区：[1]湖北武汉理工大学光纤中心 [2]湖北武汉理工大学

出　　处：《传感器世界》2005年第8期13-16,共4页Sensor World

基　　金：国家973重大基础研究基金项目;编号:513160ZT2

摘　　要：介绍了一种基于边缘滤波器,可带中心波长自动跟踪,主要应用于海底水声信号的检测的光纤光栅波长解调器。实验结果表明:解调器上电后对光栅中心波长自动跟踪范围16.6nm,解调器最小分辨率为13pm,动态范围为490pm,动态测量的带宽为20Hz～5kHz。An automatic tracing centric wavelength demodulation system based on the edge filter which can measure the wavelength of the narrow-band back-reflected spectrum FBG is described. Initial experiments demonstrated that this interrogation technique is very suitable in the field of detecting acoustic signals, and it can automatically track the FBG wavelength, and the range of auto-track is 16.6nm, minimum resolution is 13pm and dynamic range is 490pm. Dynamic strain measurement response speed has been limited from 20Hz to 5kHz.

关 键 词：光纤光栅 解调 自动跟踪 边缘滤波器 

分 类 号：TB565.1[交通运输工程—水声工程]