Strain Measurement by Fiber-Loop Ring-Down Spectroscopy and Fiber Mode Converter

Author

Qiu, Huiye ; Qiu, Yishen ; Chen, Zhihao ; Fu, Baoyu ; Li, Gaoming

Author_Institution

Key Lab. of Optoelectron. Sci. & Technol., Fujian Normal Univ., Fuzhou

Volume

8

Issue

7

fYear

2008

fDate

7/1/2008 12:00:00 AM

Firstpage

1180

Lastpage

1183

Abstract

A multimode fiber-loop ring-down spectroscopy combined with a fiber mode converter for strain measurement is presented. The bending loss theory in multimode fibers is used for the explanation of strain induced ring down cavity loss mechanism, which agrees well with the experimental results. With this technique, strain measurement is achieved in a time domain by measuring the ring-down time. The strain sensing system is demonstrated with good linear response, good stability and high resolution as small as 0.33 muepsiv over a rang of 800 muepsiv.

Keywords

fibre optic sensors; spectroscopy; strain measurement; strain sensors; cavity loss mechanism; fiber mode converter; fiber-loop ring-down spectroscopy; linear response; multimode fiber-loop ring-down spectroscopy; strain measurement; Capacitive sensors; Optical fiber devices; Optical fiber sensors; Optical fiber theory; Optical sensors; Pulse measurements; Spectroscopy; Strain measurement; Time measurement; Wavelength measurement; Fiber mode converter; fiber-loop ring-down spectroscopy; strain measurement;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2008.926884

Filename

4567494