激光探测水下声信号的实验研究

曹增辉; 郑田甜; 孙腾飞; 杨宝磊; 李丹; 张骏

光电技术应用, 2014, 29 (2): 17, 网络出版: 2014-06-03

激光探测水下声信号的实验研究

Experiment Research on Underwater Acoustic Signal for Laser Detection

论文大纲

曹增辉郑田甜孙腾飞杨宝磊李丹张骏

作者单位

烟台大学光电信息科学技术学院, 山东烟台 264005

水下声信号激光干涉频率探测光纤光路 underwater acoustic signal laser interference frequency detection fiber optical path

摘要

在实验室条件下, 对于不同频率、不同振动强度的水下声音信号展开激光相干探测研究, 建立了基于该方法的实验系统。水表面在水下声音信号作用下产生波动时, 用激光照射水表面, 其产生的水表面散射光携带了声波信息并与参考光发生干涉, 对干涉信号进行采集并处理可得到水下声信号的频率与强度信息。对不同条件下得到的实验结果进行对比分析。实验结果表明, 激光相干探测技术可有效地探测水下声信号, 并且随着声信号的频率提高、强度减弱, 探测效果趋于变差。实验系统采用全光纤光路设计, 取得了较好的效果。

Abstract

A research on laser coherent detection is developed to detect underwater acoustic signals in different frequencies and vibration intensities under laboratory conditions. And an experiment system is established based on the research. A beam of laser is irradiated water surface when the water surface is fluctuated by underwater acoustic signals. The generated scattering light with acoustic wave information will interfere with reference light. Interference signals are collected and processed to obtain the frequency and intensity information of underwater acoustic signals. Experimental results obtained under different conditions are compared and analyzed. The results show that underwater acoustic signal can be detected effectively with laser interference detection technology. And detection effects become weaker with the increasing of frequency and the weakening intensity of signals. Full fiber path design is used in the experimental system and better effect is got.

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曹增辉, 郑田甜, 孙腾飞, 杨宝磊, 李丹, 张骏. 激光探测水下声信号的实验研究[J]. 光电技术应用, 2014, 29(2): 17. CAO Zeng-hui, ZHENG Tian-tian, SUN Teng-fei, YANG Bao-lei, LI Dan, ZHANG Jun. Experiment Research on Underwater Acoustic Signal for Laser Detection[J]. Electro-Optic Technology Application, 2014, 29(2): 17.

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