Cargando…

Numerical and Experimental Analysis of Matched Filter Interrogation of FBG Sensors with Large Side Lobes

This article presents the effect of fiber Bragg gratings side lobes on interrogation systems consisting of sensor and matched filters. The conducted research shows that high-value side lobe structures applied as sensors and/or filters are characterized by some interesting properties. The paper prese...

Descripción completa

Detalles Bibliográficos
Autores principales: Skorupski, Krzysztof, Cięszczyk, Sławomir, Panas, Patryk, Kisała, Piotr
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7582784/
https://www.ncbi.nlm.nih.gov/pubmed/32992451
http://dx.doi.org/10.3390/s20195522
_version_ 1783599271500578816
author Skorupski, Krzysztof
Cięszczyk, Sławomir
Panas, Patryk
Kisała, Piotr
author_facet Skorupski, Krzysztof
Cięszczyk, Sławomir
Panas, Patryk
Kisała, Piotr
author_sort Skorupski, Krzysztof
collection PubMed
description This article presents the effect of fiber Bragg gratings side lobes on interrogation systems consisting of sensor and matched filters. The conducted research shows that high-value side lobe structures applied as sensors and/or filters are characterized by some interesting properties. The paper presents both numerical analysis and experimental verification of the fiber Bragg gratings (FBG) interrogation systems with matched filters for gratings containing high side lobes. Numerical modeling of Bragg structures was performed for two different cases: uniform and inverse apodization. Modification of apodization can change the side lobe reflectance level even above levels found in uniform structures. This is a case not described in the literature, especially in terms of possible applications. Transfer characteristics, i.e., the relationship between power intensity as a function of wavelength shift, were determined. A collection of gratings with spectra corresponding to those analyzed in numerical experiments were fabricated. Next, the transfer characteristics of the interrogation systems containing real FBG were determined. The properties of the proposed systems are described. It has been shown that a significant level of sidebands, which is often the subject of many drawbacks in filtering or telecommunications systems, can be an advantage. It has been demonstrated that a high level of side lobes can be used to increase the measurement range of the FBG sensor interrogation systems. It has been determined numerically and confirmed experimentally that from the point of view of the design of sensor interrogation systems, it is beneficial to combine specific pairs of gratings: one with a spectrum characterized by a low side lobe level and a second one in which the spectrum has very high side lobes.
format Online
Article
Text
id pubmed-7582784
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-75827842020-10-28 Numerical and Experimental Analysis of Matched Filter Interrogation of FBG Sensors with Large Side Lobes Skorupski, Krzysztof Cięszczyk, Sławomir Panas, Patryk Kisała, Piotr Sensors (Basel) Letter This article presents the effect of fiber Bragg gratings side lobes on interrogation systems consisting of sensor and matched filters. The conducted research shows that high-value side lobe structures applied as sensors and/or filters are characterized by some interesting properties. The paper presents both numerical analysis and experimental verification of the fiber Bragg gratings (FBG) interrogation systems with matched filters for gratings containing high side lobes. Numerical modeling of Bragg structures was performed for two different cases: uniform and inverse apodization. Modification of apodization can change the side lobe reflectance level even above levels found in uniform structures. This is a case not described in the literature, especially in terms of possible applications. Transfer characteristics, i.e., the relationship between power intensity as a function of wavelength shift, were determined. A collection of gratings with spectra corresponding to those analyzed in numerical experiments were fabricated. Next, the transfer characteristics of the interrogation systems containing real FBG were determined. The properties of the proposed systems are described. It has been shown that a significant level of sidebands, which is often the subject of many drawbacks in filtering or telecommunications systems, can be an advantage. It has been demonstrated that a high level of side lobes can be used to increase the measurement range of the FBG sensor interrogation systems. It has been determined numerically and confirmed experimentally that from the point of view of the design of sensor interrogation systems, it is beneficial to combine specific pairs of gratings: one with a spectrum characterized by a low side lobe level and a second one in which the spectrum has very high side lobes. MDPI 2020-09-27 /pmc/articles/PMC7582784/ /pubmed/32992451 http://dx.doi.org/10.3390/s20195522 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Letter
Skorupski, Krzysztof
Cięszczyk, Sławomir
Panas, Patryk
Kisała, Piotr
Numerical and Experimental Analysis of Matched Filter Interrogation of FBG Sensors with Large Side Lobes
title Numerical and Experimental Analysis of Matched Filter Interrogation of FBG Sensors with Large Side Lobes
title_full Numerical and Experimental Analysis of Matched Filter Interrogation of FBG Sensors with Large Side Lobes
title_fullStr Numerical and Experimental Analysis of Matched Filter Interrogation of FBG Sensors with Large Side Lobes
title_full_unstemmed Numerical and Experimental Analysis of Matched Filter Interrogation of FBG Sensors with Large Side Lobes
title_short Numerical and Experimental Analysis of Matched Filter Interrogation of FBG Sensors with Large Side Lobes
title_sort numerical and experimental analysis of matched filter interrogation of fbg sensors with large side lobes
topic Letter
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7582784/
https://www.ncbi.nlm.nih.gov/pubmed/32992451
http://dx.doi.org/10.3390/s20195522
work_keys_str_mv AT skorupskikrzysztof numericalandexperimentalanalysisofmatchedfilterinterrogationoffbgsensorswithlargesidelobes
AT cieszczyksławomir numericalandexperimentalanalysisofmatchedfilterinterrogationoffbgsensorswithlargesidelobes
AT panaspatryk numericalandexperimentalanalysisofmatchedfilterinterrogationoffbgsensorswithlargesidelobes
AT kisałapiotr numericalandexperimentalanalysisofmatchedfilterinterrogationoffbgsensorswithlargesidelobes