Fiber Optic Refractive Index Distributed Multi-Sensors by Scattering-Level Multiplexing with MgO Nanoparticle-Doped Fibers

Takhmina Ayupova, Daniele Tosi, Madina Shaimerdenova, Sanzhar Korganbayev, Marzhan Sypabekova, Aliya Bekmurzayeva, Wilfried Blanc, Salvador Sales, Tuan Guo, Carlo Molardi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In this work, we present the architecture of a multiplexed refractive index (RI) sensing system based on the interrogation of Rayleigh backscattering. The RI sensors are fabricated by fiber wet-etching of a high-scattering MgO nanoparticle-doped fiber, without the need for a reflector or plasmonic element. Interrogation is performed by means of optical backscatter reflectometry (OBR), which allows a detection with a millimeter-level spatial resolution. Multiplexing consists of a simultaneous scan of multiple fibers, achieved by means of scattering-level multiplexing (SLMux) concept, which uses the backscattered power level in each location as a diversity element. The sensors fabricated have sensitivity in the order of 0.473-0.568 nm/RIU (in one sensing point) and have been simultaneously detected together with a distributed temperature sensing element for multi-parameter measurement. An experimental setup has been prepared to demonstrate the capability of each sensing region to operate without cross-talk, while operating multi-fiber detection.

Original languageEnglish
Article number8902068
Pages (from-to)2504-2510
Number of pages7
JournalIEEE Sensors Journal
Volume20
Issue number5
DOIs
Publication statusPublished - Mar 1 2020

Keywords

  • Refractive index sensor
  • distributed sensing
  • multiplexing
  • optical backscatter reflectometry
  • optical fiber sensors

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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