Humidity sensor based on a long-period fiber grating coated with a SiO 2-nanospheres film

  • D. Viegas*
  • , J. Goicoechea
  • , J. M. Corres
  • , J. L. Santos
  • , L. A. Ferreira
  • , F. M. Araujo
  • , I. R. Matias
  • *Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Citations (Scopus)

Abstract

This work addresses a humidity sensor using long-period fiber gratings (LPG) coated with silica nanospheres film. SiO2-nanospheres coating is deposited onto the LPG using the electrostatic self-assembly technique (ESA). The polymeric overlay changes its optical properties when exposed to different humidity levels, resulting in a shift of the resonance wavelength of the LPG. The obtained results are accordant with the theoretical simulations. Wavelength shifts up to 12nm in a humidity range from 20% to 80% are reported, maintaining the same dependence at different temperatures.

Original languageEnglish
Title of host publication19th International Conference on Optical Fibre Sensors
DOIs
Publication statusPublished - 2008
Externally publishedYes
Event19th International Conference on Optical Fibre Sensors - Perth, WA, Australia
Duration: 15 Apr 200818 Apr 2008

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7004
ISSN (Print)0277-786X

Conference

Conference19th International Conference on Optical Fibre Sensors
Country/TerritoryAustralia
CityPerth, WA
Period15/04/0818/04/08

Keywords

  • Electrostatic self-assembly
  • Humidity sensor
  • Long-period grating
  • Nanospheres

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