Fiber Bragg Grating (FBG) sensors in a high-scattering optical fiber doped with MgO nanoparticles for polarization-dependent temperature sensing

Carlo Molardi, Tiago Paixão, Aidana Beisenova, Rui Min, Paulo Antunes, Carlos Marques, Wilfried Blanc, Daniele Tosi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The characterization of Fiber Bragg Grating (FBG) sensors on a high-scattering fiber, having the core doped with MgO nanoparticles for polarization-dependent temperature sensing is reported. The fiber has a scattering level 37.2 dB higher than a single-mode fiber. FBGs have been inscribed by mean of a near-infrared femtosecond laser and a phase mask, with Bragg wavelength around 1552 nm. The characterization shows a thermal sensitivity of 11.45 pm/°C. A polarization-selective thermal behavior has been obtained, with sensitivity of 11.53 pm/°C for the perpendicular polarization (S) and 11.08 pm/°C for the parallel polarization (P), thus having 4.0% different sensitivity between the two polarizations. The results show the inscription of high-reflectivity FBGs onto a fiber core doped with nanoparticles, with the possibility of having reflectors into a fiber with tailored Rayleigh scattering properties.

Original languageEnglish
Article number3107
JournalApplied Sciences (Switzerland)
Volume9
Issue number15
DOIs
Publication statusPublished - Aug 1 2019

Keywords

  • Enhanced backscattering fiber
  • FBG sensor
  • Fiber Bragg Grating (FBG)
  • Polarization-sensitive device
  • Rayleigh scattering

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation
  • Engineering(all)
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes

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