Stabilized.interrogation and multiplexing techniques for fibre Bragg grating vibration sensors

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We demonstrated a simple interrogation system for multiplexed fibre Bragg grating (FBG) sensors in a high-frequency range. A tunable fibre Fabry-Perot (FFP) filter with narrow free spectral range (FSR) was used to simplify the multiplexing demodulator for FBG vibration sensors. A stabilization-controlling unit was also developed for the maintenance of maximum sensitivity of the sensors. In order to verify the performance of the stabilization control unit, we measured the sensitivity of the FBG sensor by changing environmental temperature, and the system showed an average sensitivity of 2.5 n epsilon(RMS) Hz(-1/2) for a stabilization-controlled case. Finally, multi-point vibration tests using in-line FBG sensors were conducted to validate the multiplexing performance of the FBG system.
Publisher
IOP PUBLISHING LTD
Issue Date
2005-03
Language
English
Article Type
Article
Keywords

STRAIN

Citation

MEASUREMENT SCIENCE & TECHNOLOGY, v.16, no.3, pp.813 - 820

ISSN
0957-0233
DOI
10.1088/0957-0233/16/024
URI
http://hdl.handle.net/10203/21989
Appears in Collection
AE-Journal Papers(저널논문)
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