Open AccessHigh-accuracy fiber optical microphone in a DBR fiber laser based on a nanothick silver diaphragm by self-mixing technique
Author(s) -
Zhengting Du,
Liang Lü,
Wenhua Zhang,
BoSuk Yang,
Shuang Wu,
Yunhe Zhao,
Feng Xu,
Zhiping Wang,
Huaqiao Gui,
Jianguo Liu,
Benli Yu
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.030580
Subject(s) - materials science , diaphragm (acoustics) , optics , microphone , fiber laser , optical fiber , laser , fiber , fusion splicing , acoustics , vibration , sound pressure , physics , composite material
A high-accuracy fiber optical microphone (FOM) is first applied by self-mixing technique in a DBR fiber laser based on a nanothick silver diaphragm. The nanothick silver diaphragm fabricated by the convenient and low cost electroless plating method is functioned as sensing diaphragm due to critically susceptible to the air vibration. Simultaneously, micro-vibration theory model of self-mixing interference fiber optical microphone is deduced based on quasi-analytical method. The dynamic property to frequencies and amplitudes are experimentally carried out to characterize the fabricated FOM and also the reproduced sound of news and music can clearly meet the ear of the people which shows the technique proposed in this paper guarantee steady, high signal-noise ratio operation and outstanding accuracy in the DBR fiber laser which is potential to medical and security applications such as real-time voice reproduction for throat and voiceprint verification.