A distributed optical fiber sensor for hydrogen detection based on Pd, and Mg alloys

C. Perrotton, Martin Slaman, N. Javahiraly, H. Schreuders, B. Dam, P. Meyrueis

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

Abstract

An optical fiber containing structured hydrogen sensing points, consisting of Palladium and/or Magnesium alloys is proposed and characterized. The sensitive layer is deposited on the outside of a multimode fiber, after removing the optical cladding. The sensor is based on a measurement technique which uses the Surface Plasmon Resonance effect. Compared to previous work1 which was performed at a single wavelength of 670nm, this study was done in the range of 450 to 900nm. A continuous change in intensity is observed as a function of the hydrogen concentration between 0.5% and 4% H2 in Ar. The response shows that the intensity transmitted can either decrease or increase, depending on the selected wavelength. The response time and the reproducibility of the detectors are also discussed. From our experiments and optical simulations we conclude that Pd covered indicator layers based on Mg alloys, such as Mg-Ti, would be even more advantageous compare to Pd layers thanks to their lower hydrogen equilibrium pressures. We will demonstrate an
extended sensitivity range by juxtaposing different materials over a fiber section, having different hydrogen equilibrium pressures.
Original languageEnglish
Title of host publicationProceedings of SPIE
Subtitle of host publicationPhotonics in the Transportation Industry: Auto to Aerospace III
PublisherSPIE
Pages1-8
Number of pages8
Volume7675
Publication statusPublished - 24 Jun 2010

Keywords

  • Optical fiber
  • fiber optic sensor
  • Surface Plasmon Resonance
  • Palladium
  • Mg alloys

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