Infrasound detection by laser diode self-mixing interferometry

被引：0
|
作者：
李成伟 [1 ]
黄贞 [1 ,2 ]
孙晓刚 [1 ]
机构：
[1] School of Electrical Engineering and Automation,Harbin Institute of Technology
[2] School of Physical Science and Technology,Zhanjiang Normal University
来源：
ChineseOpticsLetters | 2013年 / 11卷 / 02期
关键词：
D O I：
暂无
中图分类号：
TN31 [半导体二极管];
学科分类号：
0805 ; 080501 ; 080502 ; 080903 ;
摘要：
An alternative technique for infrasound detection based on the self-mixing (SM) interference of a laser diode is described. The principle involved is the dependence of the power emitted by the laser diode on infrasound-induced membrane vibration. The Fourier transform and fringe-counting methods are used to analyze the self-mixing signal. Infrasound signals are experimentally measured from 2 to 20 Hz with a resolution of 0.25, and the results well agree with the theoretical ones.
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页码：46 / 50
页数：5
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