bullet Sensors & Transducers Journal

    (ISSN: 2306-8515, e-ISSN 1726-5479)


    About this Journal

   Information for Authors

   Editorial Board

   Editorial Calendar

   Current Issue

   Browse Journal

S&T journal's cover

Submit Press Release

Submit White Paper

25 Top Downloaded Articles (2007-2012)


Contact Us





Vol. 259, Issue 5, October 2022, pp. 19-28




Fibre Bragg Grating Based Optical Sensors Accuracy Improvement

1, * František URBAN jr., 2 Radek HELÁN and 3 František URBAN sr.

1 Brno University of Technology, Faculty of Electrical Engineering and Communication, Dept. of Telecommunications, Technická 12, Brno, 61600, Czech Republic
2 Network Group s.r.o., Dept. SFO, Olomoucká 91, Brno, 627 00, Czech Republic
3 Brno University of Technology, Faculty of Electrical Engineering and Communication, Dept. of Microelectronics, Technická 10, Brno, 61600, Czech Republic
1 Tel.: + 420736625804

E-mail: f.urban@nwg.cz


Received: 1 September 2022 /Accepted: 5 October 2022 /Published: 31 October 2022



Abstract: Fibre optic based sensors are becoming very successful tool for accurate and perturbation insensitive sensing of many non-electric and electric values. Favorite fibre sensoric structure capable of point and semi-distributed sensing of all effects influencing physical dimensions or refractive index of a fibre waveguide is the Fibre Bragg Grating. An interrogation of the grating reflectance spectrum is the important part of the fibre grating based sensorial system that can significantly affect the facilities of the measuring system and influence the applicability of the technology. The article analyses the spectrum scanning type of the grating sensor interrogation. We expose two main impacts that influence the accuracy of the measurement of the fibre grating spectral wavelength shift that bears the measured value. Both of them are connected with the quantity of the Grating Quality factor that we have defined for this purpose. The first impact refers to the way of scanning the wavelength spectrum of the sensorial grating and shows that the optimal measuring results are obtained when using the scanning filter wavelength spectrum width equal to the wavelength spectrum width of the sensorial fibre Bragg grating. The second impact lies in finding the grating design assuring the minimal size of the noise grating linewidth, also defined in this work. The work shows how the application of the specific apodization schemes to the fibre Bragg grating design can improve the noise grating linewidtg. Analysis of two suitable apodization profiles shows that the specific apodization of gratings can significantly improve the measuring accuracy of the scanning spectral interrogation of the grating based optical sensors.


Keywords: Fibre Bragg grating, Spectrum scanning, Spectrum linewidth, Apodization profile.


Acrobat reader logo Click <here> or title of paper to download the full pages article in pdf format



This work is licensed under a Creative Commons 4.0 International License


 Creative Commons License


Read more about Optical Sensors






1999 - 2022 Copyright ©, International Frequency Sensor Association (IFSA) Publishing, S.L. All Rights Reserved.

Home - News - Links - Archives - Tools - Voltage-to-Frequency Converters - Standardization - Patents - Marketplace - Projects - Wish List - e-Shop - Sensor Jobs - Membership - Videos - Publishing - Site Map - Subscribe - Search

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Submit Press Release - Submit White Paper - Testimonies - Twitter - Facebook - LinkedIn