Remote system for detection of low-levels of methane based on photonic crystal fibres and wavelength modulation spectroscopy

J. P. Carvalho, H. Lehmann, H. Bartelt, F. Magalhes, R. Amezcua-Correa, J. L. Santos, J. Van Roosbroeck, F. M. Arajo, L. A. Ferreira, J. C. Knight

Research output: Contribution to journalReview article

29 Citations (Scopus)

Abstract

In this work we described an optical fibre sensing system for detecting low levels of methane. The properties of hollow-core photonic crystal fibres are explored to have a sensing head with favourable characteristics for gas sensing, particularly in what concerns intrinsic readout sensitivity and gas diffusion time in the sensing structure. The sensor interrogation was performed applying the Wavelength Modulation Spectroscopy technique, and a portable measurement unit was developed with performance suitable for remote detection of low levels of methane. This portable system has the capacity to simultaneously interrogate four remote photonic crystal fibre sensing heads.

Original languageEnglish
Article number398403
Number of pages10
JournalJournal of Sensors
Volume2009
DOIs
Publication statusPublished - 1 Dec 2009

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Instrumentation
  • Electrical and Electronic Engineering

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