Diaphragm based long cavity Fabry-Perot fiber acoustic sensor using phase generated carrier

被引：71

作者：

Liu, Bin ^{[1
]}

Lin, Jie ^{[1
]}

Liu, Huan ^{[1
]}

Ma, Yuan ^{[2
]}

Yan, Lei ^{[3
]}

Jin, Peng ^{[1
]}

机构：

[1] Harbin Inst Technol, Ctr Ultra Precis Optoelect Engn, Harbin 150080, Peoples R China

[2] Dalhousie Univ, Dept Elect & Comp Engn, Halifax, NS B3H 4R2, Canada

[3] Beijing Aerosp Inst Meteorol & Measurement Techno, Beijing 100076, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2017年 / 382卷

基金：

国家高技术研究发展计划(863计划);

关键词：

Acoustic testing; Optical fiber measurements; Fabry-Perot interferometers; PRESSURE SENSOR; HYDROPHONE;

D O I：

10.1016/j.optcom.2016.08.013

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A diaphragm based long cavity Fabry-Perot interferometric fiber acoustic sensor is proposed. The Fabry-Perot cavity is formed by a flat fiber facet and an ultra-thin silver diaphragm with a 6-meter long fiber inserted in the cavity. A narrow-linewidth ring-cavity erbium-doped fiber laser is applied to demodulate the sensing signal in the phase generated carrier algorithm. Experimental results have demonstrated that the phase sensitivity is about - 140 dB re 1 rad/mu Pa at 2 kHz. The noise equivalent acoustic signal level is 60.6 mu Pa/Hz(1/2) and the dynamic range is 65.1 dB-SPL at 2 kHz. The sensor is suitable for sensing of weak acoustic signals. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：514 / 518

页数：5