An efficient and fast detection algorithm for multimode FBG sensing

Denis Ganziy, O. Jespersen, B. Rose, Ole Bang

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We propose a novel dynamic gate algorithm (DGA) for fast and accurate peak detection. The algorithm uses threshold determined detection window and Center of gravity algorithm with bias compensation. We analyze the wavelength fit resolution of the DGA for different values of signal to noise ratio and different typical peak shapes. Our simulations and experiments demonstrate that the DGA method is fast and robust with higher stability and accuracy compared to conventional algorithms. This makes it very attractive for future implementation in sensing systems especially based on multimode fiber Bragg gratings.
Original languageEnglish
Title of host publicationProceedings of SPIE
Editors José Kalinowski Hypolito, José Luís Fabris, Wojtek J. Bock
Number of pages4
PublisherSPIE - International Society for Optical Engineering
Publication date2015
Article number963445
Publication statusPublished - 2015
Event24th International Conference on Optical Fibre Sensors - Curitiba , Brazil
Duration: 28 Sep 20152 Oct 2015


Conference24th International Conference on Optical Fibre Sensors
SeriesProceedings of SPIE, the International Society for Optical Engineering

Bibliographical note

Copyright 2015 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


  • Wavelength detection
  • Demodulation algorithm
  • Fiber Bragg grating (FBG)
  • Fiber optic sensor

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