Advanced Interrogation of Fiber-Optic Bragg Grating and Fabry-Perot Sensors with KLT AnalysisReportar como inadecuado




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Nazarbayev University, School of Engineering, 010000 Astana, Kazakhstan





Academic Editor: Elfed Lewis

Abstract The Karhunen-Loeve Transform KLT is applied to accurate detection of optical fiber sensors in the spectral domain. By processing an optical spectrum, although coarsely sampled, through the KLT, and subsequently processing the obtained eigenvalues, it is possible to decode a plurality of optical sensor results. The KLT returns higher accuracy than other demodulation techniques, despite coarse sampling, and exhibits higher resilience to noise. Three case studies of KLT-based processing are presented, representing most of the current challenges in optical fiber sensing: 1 demodulation of individual sensors, such as Fiber Bragg Gratings FBGs and Fabry-Perot Interferometers FPIs; 2 demodulation of dual FBG-FPI sensors; 3 application of reverse KLT to isolate different sensors operating on the same spectrum. A simulative outline is provided to demonstrate the KLT operation and estimate performance; a brief experimental section is also provided to validate accurate FBG and FPI decoding. View Full-Text

Keywords: optical fiber sensors OFS; fiber Bragg grating FBG; Fabry-Perot interferometry FPI; optical signal processing; Karhunen-Loeve Transform KLT; optical sensor demodulation optical fiber sensors OFS; fiber Bragg grating FBG; Fabry-Perot interferometry FPI; optical signal processing; Karhunen-Loeve Transform KLT; optical sensor demodulation





Autor: Daniele Tosi

Fuente: http://mdpi.com/



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