KLT Based Interrogation Technique for FBG Multiplexed Sensor Tracking

Javier Hervás; Daniele Tosi; Héctor García-Miquel; David Barrera; Carlos R. Fernández-Pousa; Salvador Sales

doi:10.1109/JLT.2016.2613131

KLT Based Interrogation Technique for FBG Multiplexed Sensor Tracking

Javier Hervás, Daniele Tosi, Héctor García-Miquel, David Barrera, Carlos R. Fernández-Pousa, Salvador Sales

Department of Electrical and Computer Engineering

Research output: Contribution to journal › Article

7 Citations (Scopus)

Abstract

The Karhunen-Loeve transform (KLT) is used to retrieve the wavelength information of several fiber Bragg gratings (FBGs) that are acting as a multiplexed sensor. The modulated light of a broadband source is launched to the FBG cascade in order to capture the electrical frequency response of the system. Thanks to a dispersive media, the wavelengths of the FBGs are mapped in radiofrequency (RF) delays. Wavelength changes are determined by the amplitude change of the samples in the impulse response, a change which is followed by the eigenvalue calculated by the KLT routine. The use of the KLT routine reduces by three orders of magnitude the amount of points needed to have a sub-degree resolution in temperature sensing, while keeping the accuracy almost intact.

Original language	English
Article number	7575720
Journal	Journal of Lightwave Technology
Volume	PP
Issue number	99
DOIs	https://doi.org/10.1109/JLT.2016.2613131
Publication status	Published - Jan 1 2016

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Keywords

fiber Bragg gratings
Karhunen-Loeve transform
microwave photonics
Optical fiber sensors

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Cite this

Hervás, J., Tosi, D., García-Miquel, H., Barrera, D., Fernández-Pousa, C. R., & Sales, S. (2016). KLT Based Interrogation Technique for FBG Multiplexed Sensor Tracking. Journal of Lightwave Technology, PP(99), [7575720]. https://doi.org/10.1109/JLT.2016.2613131

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Access to Document

10.1109/JLT.2016.2613131