Cantilever Fiber-Optic Accelerometer Based on Modal Interferometer

Author

Xuqiang Wu ; Xue Wang ; Shili Li ; Sheng Huang ; Qiang Ge ; Benli Yu

Author_Institution

Key Lab. of Opto-Electron. Inf. Acquisition & Manipulation of Minist. of Educ., Anhui Univ., Hefei, China

Volume

27

Issue

15

fYear

2015

fDate

Aug.1, 1 2015

Firstpage

1632

Lastpage

1635

Abstract

A cantilever fiber-optic accelerometer using modal interferometer, with a large fringe visibility of up to 30 dB, is proposed and demonstrated. In the system, an electrical testing replaces optical-spectrum detection to achieve fast acceleration measurement of the cantilever fiber-optic accelerometer, and the performance of the cantilever fiber-optic accelerometer is studied experimentally. Experimental results show that the minimum detectable acceleration is 1.36 mg, and the resonance frequency is 520 Hz. Meanwhile, the angular dependence of the fiber accelerometer is also analyzed in the article and the result shows that the output intensity difference is up to 18 dB for different angles. This fiber-optic accelerometer can be used to detect underwater acoustic and seismic wave.

Keywords

acceleration measurement; accelerometers; cantilevers; fibre optic sensors; integrated optics; light interferometers; optical fibre testing; seismic waves; underwater sound; cantilever fiber-optic accelerometer; electrical testing; fast acceleration measurement; frequency 520 Hz; fringe visibility; modal interferometer; output intensity; resonance frequency; seismic wave detection; underwater acoustic wave detection; Acceleration; Accelerometers; Optical fiber sensors; Optical fibers; Optical interferometry; Vibrations; Fiber-optic accelerometer; Integrated optics devices; cantilever; integrated optics devices; modal interferometer;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2015.2432833

Filename

7106464