Low cost optical interrogation system based on FBG sensors

Roncancio, J. Sebastian; Gonzalez, Nathalia; Cano, C. Camilo; Varón, Margarita

doi:10.1109/imoc.2015.7369152

Cited by 3 publications

(1 citation statement)

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“…The filtering process is usually performed by a second FBG, the edge filter itself, unbalanced interferometers, Fabry–Perot filters, among others [ 19 , 20 ]. Standard FBG used as an edge filter shows high sensitivity but very limited dynamic range [ 20 , 21 , 22 ]. Tilted FBG required special treatment in order to obtain high visibility [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Low-Cost Interrogation Technique for Dynamic Measurements with FBG-Based Devices

Díaz

Leitão

Marques

et al. 2017

Sensors

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Fiber Bragg gratings are widely used optical fiber sensors for measuring temperature and/or mechanical strain. Nevertheless, the high cost of the interrogation systems is the most important drawback for their large commercial application. In this work, an in-line Fabry–Perot interferometer based edge filter is explored in the interrogation of fiber Bragg grating dynamic measurements up to 5 kHz. Two devices an accelerometer and an arterial pulse wave probe were interrogated with the developed approach and the results were compared with a commercial interrogation monitor. The data obtained with the edge filter are in agreement with the commercial device, with a maximum RMSE of 0.05 being able to meet the requirements of the measurements. Resolutions of 3.6 pm and 2.4 pm were obtained, using the optical accelerometer and the arterial pulse wave probe, respectively.

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