Simultaneous Distributed Sensing on Multiple MgO-Doped High Scattering Fibers by Means of Scattering-Level Multiplexing

Aidana Beisenova, Aizhan Issatayeva, Sanzhar Korganbayev, Carlo Molardi, Wilfried Blanc, Daniele Tosi

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We introduce a novel multiplexing technique applied to optical fiber distributed sensors, based on optical backscatter reflectometry (OBR) and high-scattering MgO-doped fibers. In this paper, we demonstrate the possibility of simultaneously detecting multiple fiber with a single scan using an OBR distributed sensor, and successfully discriminating each sensing region (with ∼1 mm spatial resolution). The sensing element is a high-scattering fiber with MgO-based nanoparticles doping in the core, that emits a scattering signal more than 40 dB larger than a standard fiber, while having similar temperature and strain sensitivity. Multiplexing occurs as the scattered light from a sensing fiber overshadows the amount of scattering occurring in all the other channels. The setup has been validated for temperature sensing and implemented in an epidural catheter with multiple fibers fixed to the outer walls for strain sensing. The proposed solution goes beyond the multiplexing methods which exploit 1 × N switches, as the multiplexing is simultaneous and not rearranged in different time slots.

Original languageEnglish
Article number8715510
Pages (from-to)3413-3421
Number of pages9
JournalJournal of Lightwave Technology
Volume37
Issue number13
DOIs
Publication statusPublished - Jul 1 2019

Keywords

  • High scattering fiber
  • microstructured fibers
  • optical backscatter reflectometry
  • optical fiber sensors
  • spatial multiplexing

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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