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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/116989
Título: 
Optimized design of substrate-integrated hollow waveguides for mid-infrared gas analyzers
Autor(es): 
Instituição: 
  • Univ Ulm
  • Universidade Estadual de Campinas (UNICAMP)
  • Universidade Estadual Paulista (UNESP)
ISSN: 
2040-8978
Financiador: 
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
  • INCTAA
  • Machine Shop at the University of Ulm
  • US Department of Energy by Lawrence Livermore National Laboratory (LLNL)
  • LLNL
Número do financiamento: 
  • FAPESP: 12/05573-6
  • US Department of Energy by Lawrence Livermore National Laboratory (LLNL)DE-AC52-07NA27344
  • LLNLB598643
  • LLNLB603018
Resumo: 
Design and analytical performance studies are presented for optimizing a new generation of hollow waveguides suitable for quantitative gas sensing-the so-called substrate-integrated hollow waveguide (iHWG). Taking advantage of a particularly compact Fourier transform infrared spectrometer optimized iHWG geometries are investigated toward the development of a multi-constituent breath analysis tool compatible for usage, e.g., in exhaled mouse breath analysis. Three different iHWG geometries were compared, i.e., straight, meandering one-turn and meandering two-turn waveguide channels aiming at maximizing the related analytical figures-of-merit including the achievable limits of detection for selected exemplary analytes. In addition, efficient coupling of infrared (IR) radiation into straight iHWGs was investigated using integrated optical funnel structures. Calibration functions of butane in nitrogen serving as IR-transparent matrix gas were established and compared for the various iHWG geometries. Given the tidal volume of exhaled breath (EB) samples ranging from a few hundreds of milliliters (human, swine) to a few hundreds of microliters (mouse), it is essential for any given analysis to select an appropriate waveguide geometry and volume yet maintaining (i) a compact footprint ensuring hand-held instrumentation, (ii) modular exchange of the iHWG according to the analysis requirement yet with constant device format, and (iii) enabling inline/online measurement capabilities toward continuous EB diagnostics.
Data de publicação: 
1-Set-2014
Citação: 
Journal Of Optics. Bristol: Iop Publishing Ltd, v. 16, n. 9, 6 p., 2014.
Duração: 
6
Publicador: 
Iop Publishing Ltd
Palavras-chaves: 
  • substrate-integrated hollow waveguide
  • mid-infrared
  • mid-infrared sensors
  • optical sensors
  • gas sensing
  • hydrocarbons
Fonte: 
http://dx.doi.org/10.1088/2040-8978/16/9/094006
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/116989
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