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Sensors 2017, 17(10), 2368; https://doi.org/10.3390/s17102368

Review and Analysis of Peak Tracking Techniques for Fiber Bragg Grating Sensors

1
School of Engineering, Nazarbayev University, Astana 010000, Kazakhstan
2
Laboratory of Biosensors and Bioinstruments, National Laboratory Astana, Nazarbayev University, Astana 010000, Kazakhstan
Received: 30 August 2017 / Revised: 22 September 2017 / Accepted: 25 September 2017 / Published: 17 October 2017
(This article belongs to the Special Issue Fiber Bragg Grating Based Sensors)

Abstract

Fiber Bragg Grating (FBG) sensors are among the most popular elements for fiber optic sensor networks used for the direct measurement of temperature and strain. Modern FBG interrogation setups measure the FBG spectrum in real-time, and determine the shift of the Bragg wavelength of the FBG in order to estimate the physical parameters. The problem of determining the peak wavelength of the FBG from a spectral measurement limited in resolution and noise, is referred as the peak-tracking problem. In this work, the several peak-tracking approaches are reviewed and classified, outlining their algorithmic implementations: the methods based on direct estimation, interpolation, correlation, resampling, transforms, and optimization are discussed in all their proposed implementations. Then, a simulation based on coupled-mode theory compares the performance of the main peak-tracking methods, in terms of accuracy and signal to noise ratio resilience. View Full-Text
Keywords: Fiber Bragg Grating (FBG); optical fiber sensors; optical sensors; peak tracking; wavelength shift estimation Fiber Bragg Grating (FBG); optical fiber sensors; optical sensors; peak tracking; wavelength shift estimation
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Tosi, D. Review and Analysis of Peak Tracking Techniques for Fiber Bragg Grating Sensors. Sensors 2017, 17, 2368.

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