A low-cost technique for simulation and characterization of fi bre Bragg grating sensors in undergraduate instructional laboratories

Fibre optic sensors are becoming so important in engineering that it is important to introduce this new subject in Electrical Engineering courses. This work describes the construction of a simple, low-cost fibre Bragg grating (FBG) electronic interrogation system that uses LabVIEW as a tool for simu...

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Bibliographic Details
Published in:International journal of electrical engineering & education 2014-01, Vol.51 (1), p.12
Main Authors: Dante, Alex, Pfrimer, Felipe Walter Dafico, Ferreira, Elnatan Chagas, Dias, José Antonio Siqueira
Format: Article
Language:English
Subjects:
Climate
Computer simulation
Electrical engineering
Engineering
Fiber optics
Light
Literary Devices
Measurement Equipment
Optics
Profiles
Sensors
Spectrum analysis
Testing laboratories
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Summary:Fibre optic sensors are becoming so important in engineering that it is important to introduce this new subject in Electrical Engineering courses. This work describes the construction of a simple, low-cost fibre Bragg grating (FBG) electronic interrogation system that uses LabVIEW as a tool for simulation, measurement interface and parameter extraction of the FBGs. Although the system is relatively slow (a precise FBG characterization takes 10 minutes to be performed), the students can observe, while performing the assigned tasks, all the signals in the interrogator circuit, resulting in an extremely useful didactic tool. The measurements obtained with the system are in very good agreement with results measured on expensive Optical Spectrum Analysers when obtaining a full FBG profile. The system can also be used to measure and characterize FBGs submitted to external strains (e.g., temperature and force) demonstrating the Bragg shiftcaused by these strains on FBG sensors. [PUBLICATION ABSTRACT]
ISSN:0020-7209
2050-4578