Enhancement of FBG Multiplexing Capability Using a Spectral Tag Method

Author

Choi, Ki-Sun ; Son, Ju-Youn ; Kim, Geun-Jin ; Lee, Kyoung-Shin ; Youn, Jaesoon ; Baik, Se-Jong ; Im, Kiegon ; Kim, Jae-Min ; Kim, Young-Sang

Author_Institution

Dept. of Phys., Chonnam Nat. Univ., Gwangju

Volume

20

Issue

23

fYear

2008

Firstpage

2013

Lastpage

2015

Abstract

Multiplexing of fiber Bragg grating (FBG) sensors is one of the most effective technologies to reduce both installation and operation costs for quasi-distributive strain and temperature measurements such as smart structure applications. We propose a novel method of enhancing the multiplexing capability of a multipoint FBG sensor system without increasing system complexity by providing a unique spectral response as an identification tag to each FBG. The number of sensors in the proposed spectral tag method can increase as N(N-1)/2 as the number of spectral codes N increases at the expense of the free spectral range.

Keywords

Bragg gratings; fibre optic sensors; intelligent sensors; multiplexing; optical arrays; sensor arrays; spectral analysers; FBG multiplexing enhancement; fiber Bragg grating sensors; multipoint FBG sensor system; quasidistributive strain measurement; quasidistributive temperature measurement; smart structure; spectral codes; spectral tag method; Distributed strain sensor; fiber Bragg grating (FBG); multiple grating; spectral code; spectral tag method; wavelength-division multiplexing (WDM);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.2006065

Filename

4663557