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低加速度灵敏度的分布反馈式光纤激光水听器研究

Low Acceleration Sensitivity DFB Fiber Laser Hydrophone

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摘要

针对分布反馈式(DFB)光纤激光水听器的加速度响应影响声压信号探测的问题,研制了一种聚氨酯端面增敏结构的DFB光纤激光水听器。建立了该结构水听器的加速度灵敏度理论模型,理论分析了套筒结构与水听器的加速度灵敏度的关系,仿真分析了水听器两端聚氨酯的弹性模量、泊松比以及高度的差异与其加速度灵敏度的关系,实现了对水听器各结构以及材料参数的优化,并制作了水听器原型样品与拖曳线列样阵,分别开展了加速度灵敏度测试和湖上动态拖曳实验研究。实验结果表明,该结构水听器在20~2000 Hz频率范围内的加速度灵敏度在各频点均小于1.2 dB,与理论分析结果较为吻合,在动态拖曳过程中的变速运动阶段也能对目标形成较高信噪比的稳定波束指向。水听器的抗加速度性能得到了有效预测以及实验验证。

Abstract

To reduce the influences of acceleration response of distributed feedback (DFB) fiber laser hydrophone on underwater acoustic detection, we design a DFB fiber laser hydrophone with sensitivity-enhanced structure through polyurethane end surface pulling. Firstly, we establish the acceleration sensitivity model of the designed hydrophone. Secondly, we theoretically analyze the relationship between the sleeve structure and the acceleration sensitivity. Thirdly, we simulate the relationship between elastic modulus, Poisson′s ratio, and height difference and acceleration sensitivity. Fourthly, we optimize the structure and materials parameters of hydrophone. At last, we fabricate and test the prototype samples of hydrophones and towed line array samples. The experimental results show that the acceleration sensitivity is less than 1.2 dB at each frequency point in the frequency range of 20-2000 Hz, which agrees well with theoretical results. The towed line array can form stable beam pointing with high noise-signal ratio during the variable speed motion phase of dynamic drag. The anti-acceleration performance of the hydrophone is effectively predicted and experimentally verified.

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中图分类号:TN253

DOI:10.3788/cjl201845.0310001

所属栏目:遥感与传感器

收稿日期:2017-09-12

修改稿日期:2017-10-24

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作者单位    点击查看

唐波:海军工程大学兵器工程系, 湖北 武汉 430033
黄俊斌:海军工程大学兵器工程系, 湖北 武汉 430033
顾宏灿:海军工程大学兵器工程系, 湖北 武汉 430033

联系人作者:唐波(942896945@qq.com)

备注:唐波(1991—),男,博士研究生,主要从事光纤传感技术方面的研究。E-mail: 942896945@qq.com

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引用该论文

Tang Bo,Huang Junbin,Gu Hongcan. Low Acceleration Sensitivity DFB Fiber Laser Hydrophone[J]. Chinese Journal of Lasers, 2018, 45(3): 0310001

唐波,黄俊斌,顾宏灿. 低加速度灵敏度的分布反馈式光纤激光水听器研究[J]. 中国激光, 2018, 45(3): 0310001

被引情况

【1】 徐倩楠, 周次明, 范典, 庞彦东, 赵晨光, 陈希, 黄俊斌, 顾宏灿. 基于斐索干涉的超弱光纤光栅水听器阵列实验研究. 激光与光电子学进展, 2019, 56(15): 150602--1

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