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Digital matched filtering (DMF) technique for the performance enhancement of few-mode fibre Bragg grating sensor

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Show simple item record Zaini, Muhammad Khairol Annuar Lee, Yen Sian Lim, Kok-Sing Ali, Muhammad Mahmood Nazal, Nurul Asha Mohd Ahmad, Harith 2019-05-10T15:08:15Z 2019-05-10T15:08:15Z 2019
dc.description peer-reviewed en_US
dc.description.abstract In this work, the digital matched filtering (DMF), a signal processing technique, has been proposed to identify the multiple peak wavelengths, more accurately from reflection spectra of etched few-mode fibre Bragg grating (FM-FBG) sensor. The etched FM-FBG has been fabricated and its intrinsic property of having different sensitivities for different reflection peaks in spectrum has been used for sensing the multiple parameters, such as temperature and refractive index of the ambient environment. The experimental characterization of the fabricated etched FM-FBG sensor has been carried out by using six samples of standard sodium chloride (NaCl(aq)) solutions with refractive indices (RIs) ranging from 1.3159 to 1.3375 at 24 °C temperature. The reflection spectra have been acquired for each sample by varying the temperature from 24 °C to 80 °C. The temperature and RI sensitivities have been investigated from the acquired spectra by using digital matched filter (DMF). The obtained sensor results have been compared with conventional peak detection (CPD) method results for the same spectra. It has been observed that the results obtained by DMF technique are closer to the reference sensor values and has shown more accuracy than the results obtained by CPD technique. It has been shown that the DMF has better performance in terms of the accuracy of measured results than that of CPD. In addition, to eliminate the effect of cross sensitivity issue of the sensor, the 3×3 order characteristic matrix has been used. Hence, the etched FM-FBG can be used as multi-parameter measurements with better performance using DMF technique. en_US
dc.language.iso eng en_US
dc.publisher IEEE Computer Society en_US
dc.relation FP033-2017A en_US
dc.relation.ispartofseries IEEE Sensors Journal; 19 (14), pp. 5653-5659
dc.rights © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. en_US
dc.subject temperature sensors en_US
dc.subject fiber gratings en_US
dc.subject optical fibers en_US
dc.subject temperature measurement en_US
dc.subject wavelength measurement en_US
dc.title Digital matched filtering (DMF) technique for the performance enhancement of few-mode fibre Bragg grating sensor en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1109/JSEN.2019.2907143
dc.relation.projectid FP033-2017A en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US

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