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Novel frequency-agile interrogating system for fiber Bragg grating sensors

Authors :
H. Geiger
John P. Dakin
Jean-Luc Archambault
Laurence Reekie
M.G. Xu
Source :
SPIE Proceedings.
Publication Year :
1993
Publisher :
SPIE, 1993.

Abstract

We have demonstrated a new frequency-agile system for the interrogation of in-fibre Bragg grating sensors. The scheme involves frequency shift keying (FSK) of the RF drive to an acousto-optic tunable filter (AOTF) to track the wavelength shifts of a Bragg grating. Theoretical studies to derive the optimum frequency deviation for achieving maximum sensitivity are given, and experimental results are presented for temperature measurement. This technique is capable of rapid, random access and very wide tuning range, showing the potential for interrogating multiplexed arrays of Bragg-grating-based sensors

Details

ISSN :
0277786X
Database :
OpenAIRE
Journal :
SPIE Proceedings
Accession number :
edsair.doi...........0f129f9d3b2e1d139f5a0a557e381016
Full Text :
https://doi.org/10.1117/12.165920