水听器
光学
光纤布拉格光栅
干涉测量
反射(计算机编程)
指向性
材料科学
多路复用
栅栏
光纤
物理
声学
电信
计算机科学
天线(收音机)
程序设计语言
作者
Mengqun Jin,Huiliang Ge,Dongming Li,Chenghui Ni
出处
期刊:Applied Optics
[The Optical Society]
日期:2018-10-19
卷期号:57 (30): 9195-9195
被引量:18
摘要
A fiber optic vector hydrophone is an interesting topic for many applications. Using a fiber Bragg grating (FBG) as a reflection unit, the vector hydrophone combines the advantages of miniaturization, high reliability, and low cost. In this paper, the interferometric vector sensing, multiplexing design, and cross-talk suppression of a fiber optic vector hydrophone based on FBG-based Fabry–Perot interferometry are discussed and validated. The average cross talk of the channels is reduced by 20 dB than that of a high-reflectivity grating by using 1% reflectivity fiber gratings. A three-component homovibrational vector hydrophone with a low-reflection FBG was developed and tested. The working band of the hydrophone is extended to 20 Hz, and the sensitivity of each vector channel is about −132.5 dB at 500 Hz and its directivity index is more than 30 dB at 100 Hz.
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