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Dynamic interrogation for optical fibre sensors based on long-period gratings

Title
Dynamic interrogation for optical fibre sensors based on long-period gratings
Type
Article in International Scientific Journal
Year
2011
Authors
Carvalho, JP
(Author)
Other
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Coelho, L
(Author)
Other
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Baptista, JM
(Author)
Other
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Santos, JL
(Author)
FCUP
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Frazao, O
(Author)
FCUP
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Journal
Vol. 22
Final page: 065201
ISSN: 0957-0233
Scientific classification
FOS: Engineering and technology > Other engineering and technologies
Other information
Authenticus ID: P-002-R2H
Abstract (EN): An electrical dynamic interrogation technique is reported for long-period grating sensors relying on the modulation of fibre Bragg gratings located in the readout unit that permits us to attenuate the effect of the 1/f noise of the photodetection, amplification and processing electronics on the sensing head resolution. The concept is tested to detect variations of curvature, and a resolution of 9.4 x 10(-3) m is achieved.
Language: English
Type (Professor's evaluation): Scientific
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