Ultrasonic imaging of seismic physical models using a fringe visibility enhanced fiber-optic Fabry-Perot interferometric sensor

被引：46

作者：

Zhang, Wenlu ^{[1
]}

Chen, Fengyi ^{[1
]}

Ma, Wenwen ^{[1
]}

Rong, Qiangzhou ^{[1
]}

Qiao, Xueguang ^{[1
]}

Wang, Ruohui ^{[1
]}

机构：

[1] Northwestern Univ, Sch Phys, Xian 710069, Shaanxi, Peoples R China

来源：

OPTICS EXPRESS | 2018年 / 26卷 / 08期

基金：

中国国家自然科学基金;

关键词：

ACOUSTIC SENSOR; DIAPHRAGM; TRANSDUCER;

D O I：

10.1364/OE.26.011025

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A fringe visibility enhanced fiber-optic Fahry-Perot interferometer based ultrasonic sensor is proposed and experimentally demonstrated for seismic physical model imaging. The sensor consists of a graded index multimode fiber collimator and a PTFE (polytetrafluoroethylene) diaphragm to form a Fabry-Perot interferometer. Owing to the increase of the sensor's spectral sideband slope and the smaller Young's modulus of the PTFE diaphragm, a high response to both continuous and pulsed ultrasound with a high SNR of 42.92 dB in 300 kHz is achieved when the spectral sideband filter technique is used to interrogate the sensor. The ultrasonic reconstructed images can clearly differentiate the shape of models with a high resolution. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

引用

页码：11025 / 11033

页数：9

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