Detection of tilted fiber Bragg grating fiber-optic sensors with short-term KLT: Towards low-cost biosensors

Madina Shaimerdenova, Aliya Bekmurzayeva, Marzhan Sypabekova, Y. Abukhanov, Daniele Tosi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Tilted Fiber Bragg Grating (TFBG) optical fiber sensors can be employed as refractive index sensors, and functionalized as biosensors. The TFBG cladding modes exhibit a small yet detectable sensitivity to the refractive index in the surrounding of the sensing region. One of the weaknesses of TFBG is that classical interrogation methods require narrow wavelength resolution to analyze these spectral features which can be achieved only through a bulky setup. In this work, we propose a demodulation method, namely the short term Karhunen-Loeve Transform (ST-KLT) that can be applied to a low-cost spectrometer that detects the TFBG reflection spectrum. The method is capable of detecting refractive index variations in the order of 10-3 - 10-4 refractive index units (RIU), and is a potential pillar towards low-cost TFBG biosensors.

Original languageEnglish
Title of host publicationOptics in Health Care and Biomedical Optics VIII
EditorsYing Gu, Qingming Luo, Xingde Li, Yuguo Tang, Dan Zhu
PublisherSPIE
Volume10820
ISBN (Electronic)9781510622388
DOIs
Publication statusPublished - Jan 1 2018
EventOptics in Health Care and Biomedical Optics VIII 2018 - Beijing, China
Duration: Oct 11 2018Oct 13 2018

Conference

ConferenceOptics in Health Care and Biomedical Optics VIII 2018
CountryChina
CityBeijing
Period10/11/1810/13/18

Keywords

  • biosensors
  • interrogator
  • Karhunen-Loeve Transform (KLT)
  • reflectivity
  • refractive index (RI)
  • sensitivity
  • sucrose
  • Tilted Fiber Bragg Grating (TFBG), fiber optic sensors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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