Remote audio signals detection using a partial-fiber laser Doppler vibrometer

All-fiber laser Doppler vibrometer (LDV) systems have great potential in the application of remote acoustic detection. However, the system performance is impaired due to the serious intermediate frequency (IF) crosstalk signal, which is caused by the fiber circulator. In this paper, a system adoptin...

Full description

Saved in:
Bibliographic Details
Published inApplied acoustics Vol. 130; pp. 216 - 221
Main Authors Wu, Shi-song, Lv, Tao, Han, Xi-yu, Yan, Chun-hui, Zhang, He-yong
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 15.01.2018
Subjects
Laser hearing
LDV
Partial-fiber
Partial-fiber
Laser hearing
LDV
Online AccessGet full text

Cover

More Information
Summary:All-fiber laser Doppler vibrometer (LDV) systems have great potential in the application of remote acoustic detection. However, the system performance is impaired due to the serious intermediate frequency (IF) crosstalk signal, which is caused by the fiber circulator. In this paper, a system adopting a partial-fiber structure is proposed and analyzed. Simulative and experimental analysis indicate that the IF crosstalk signal is mainly caused by the fiber circulator, and it damages demodulation signal. In order to reduce the IF crosstalk signal, a polarization prism is employed to substitute the circulator. Experimental results reveal that the IF crosstalk signal can be eliminated by the partial-fiber LDV effectively. The comprehensible speech signals within the range of 50m can be obtained.
ISSN:0003-682X
1872-910X
DOI:10.1016/j.apacoust.2017.09.028