Compact Fiber Optic Sensors for Dual Temperature and Refractive Index Profiling Based on Partially Etched Chirped Fiber Bragg Grating@nu.edu.kz

Sanzhar Korganbayev, Aliya Bekmurzayeva, Madina Shaimerdenova, Takhmina Ayunova, Carlo Molardi, Kanat Dukenbayev, Marzhan Sypabekova, Daniele Tosi

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

Abstract

We propose a partially etched chirped fiber Bragg grating (pECFBG) as a fiber optic sensor capable of detecting and profiling temperature and refractive index changes over the grating length. The sensor is achieved by etching a 1.4 ern-long chirped FBG by hydrofluoric acid, leaving a part of the grating unetched. In this way, we expose a part of the grating to refractive index variations in the outer medium, while the whole grating is sensitive to temperature changes. By applying spectral correlation in each grating portion, it is possible to detect profiles of temperature and refractive index, as experimentally demonstrated.

Original languageEnglish
Title of host publicationIEEE SENSORS
PublisherInstitute of Electrical and Electronics Engineers Inc.
Volume2018-October
ISBN (Electronic)9781538647073
DOIs
Publication statusPublished - Dec 26 2018
Event17th IEEE SENSORS Conference, SENSORS 2018 - New Delhi, India
Duration: Oct 28 2018Oct 31 2018

Conference

Conference17th IEEE SENSORS Conference, SENSORS 2018
CountryIndia
CityNew Delhi
Period10/28/1810/31/18

Keywords

  • Chirped FBG (CFBG)
  • distributed sensors
  • Etched FBG (EFBG)
  • Fiber Bragg Grating (FBG)
  • Fiber optic sensors

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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