Fiber Bragg grating period reconstruction using time-frequency signal analysis and application to distributed sensing

Author

Azaña, José ; Muriel, Miguel A. ; Chen, Lawrence R. ; Smith, Peter W E

Author_Institution

ETSI Telecomunicacion, Univ. Politecnica de Madrid, Spain

Volume

19

Issue

5

fYear

2001

fDate

5/1/2001 12:00:00 AM

Firstpage

646

Lastpage

654

Abstract

The period and length of a fiber grating structure can be reconstructed from its corresponding complex reflection coefficient using time-frequency signal analysis based on Wigner-Ville and spectrogram distributions. We provide an experimental demonstration of this synthesis technique on two fiber grating structures and obtain good agreement between the reconstructed values and those expected based on the parameters used in their fabrication. We then propose and numerically demonstrate how this technique can be applied to distributed strain (or temperature) sensing

Keywords

Bragg gratings; distributed sensors; fibre optic sensors; optical design techniques; optical fibre fabrication; Wigner-Ville distributions; complex reflection coefficient; distributed sensing; distributed strain sensing; fiber Bragg grating period reconstruction; fibre optic sensors; spectrogram distributions; synthesis technique; temperature sensing; time-frequency signal analysis; Bragg gratings; Capacitive sensors; Fiber gratings; Optical reflection; Photonics; Signal analysis; Signal synthesis; Spectrogram; Temperature sensors; Time frequency analysis;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.923477

Filename

923477