Echelle diffractive grating based wavelength interrogator for potential aerospace applications

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DOIResolve DOI: http://doi.org/10.1109/JLT.2013.2263278
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TypeArticle
Journal titleJournal of Lightwave Technology
ISSN0733-8724
Volume31
Issue13
Article number6516513
Pages20992105; # of pages: 7
SubjectEchelle diffractive gratings; Fiber Bragg Grating Sensors; Impact damage detection; interrogator; Measurement resolution; Practical implementation; Structural health monitoring (SHM); Wavelength interrogator; Aerospace applications; Damage detection; Electric sensing devices; Fiber Bragg gratings; Fiber optic sensors; Structural health monitoring; Diffraction gratings
AbstractOperational load monitoring and impact damage detection are the two critical aspects of aerospace structural health monitoring (SHM). Fiber Bragg grating (FBG) sensors have demonstrated great potential in both. But the currently available interrogation systems can only handle one of the two types of SHM capabilities offered by FBG sensors. In addition, the practical implementation of FBG sensor systems in aerospace vehicles requires the interrogator to be small size, light weight, and low-power consuming. In this paper, we present an Echelle diffractive grating (EDG) based interrogation system for FBG sensors, which possesses two operation modes, i.e., the sweeping mode for operational load monitoring and the parked mode for impact damage detection. Experimental results show that this interrogator offers better than 1-pm measurement resolution and 10-pm repeatability. In addition, the interrogation system is very compact and weighs less than 60 g (excluding the electronic controller). It also has the potential to achieve a measurement speed of 300 kHz and be powered by a battery.
Publication date
LanguageEnglish
AffiliationInformation and Communication Technologies; National Research Council Canada
Peer reviewedYes
NPARC number21270481
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Record identifier14eb3aa9-11b6-4208-83bf-36690db7b59b
Record created2014-02-13
Record modified2016-05-09
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