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A new gas detection technique through cross-correlation with a complex aperiodic FBG.
Rahme, Matthew; Tuthill, Peter; Betters, Christopher; Large, Maryanne; Leon-Saval, Sergio.
Afiliación
  • Rahme M; Sydney Astrophotonics Instrumentation Laboratory, School of Physics, The University of Sydney, Sydney, NSW, 2006, Australia. matthew.rahme@sydney.edu.au.
  • Tuthill P; Institute of Photonics and Optical Science, School of Physics, The University of Sydney, Sydney, NSW, 2006, Australia. matthew.rahme@sydney.edu.au.
  • Betters C; Sydney Astrophotonics Instrumentation Laboratory, School of Physics, The University of Sydney, Sydney, NSW, 2006, Australia.
  • Large M; Institute of Photonics and Optical Science, School of Physics, The University of Sydney, Sydney, NSW, 2006, Australia.
  • Leon-Saval S; Sydney Astrophotonics Instrumentation Laboratory, School of Physics, The University of Sydney, Sydney, NSW, 2006, Australia.
Sci Rep ; 14(1): 9939, 2024 Apr 30.
Article en En | MEDLINE | ID: mdl-38688955
ABSTRACT
Optical cross-correlation is a technique that can achieve both high specificity and high sensitivity when deployed as the basis for a sensing technology. Offering significant gains in cost, size and complexity, it can also deliver significantly higher signal-to-noise ratios than traditional approaches such as absorption methodologies. In this paper, we present an optical cross-correlation technology constructed around a bespoke customised Fiber Bragg Grating (FBG). Exploiting the remarkable flexibility in design enabled by multiple aperiodic Bragg gratings, optical filters are devised that exactly mimic the absorption features of a target gas species (for this paper, acetylene C 2 H 2 ) over some waveband of interest. This grating forms the heart of the sensor architecture described here that employs modulated optical cross-correlation for gas detection. An experimental demonstration of this approach is presented, and shown to be capable of differentiating between different concentrations of the C 2 H 2 target gas. Furthermore these measurements are shown to be robust against interloper species, with minimal impact on the detection signal-to-noise arising from the introduction of contaminant gases. This represents is a significant step toward the use of customised FBGs as low-cost, compact, and highly customisable photonic devices for deployment in gas detection.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Rep Año: 2024 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Rep Año: 2024 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Reino Unido