Hochschule für Technik und Umwelt FHNW

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  • Vorschaubild
    Publikation
    Development of a waveguide-based interferometer for the measurement of trace substances
    (Zenodo, 07.11.2023) Weingartner, Ernest; Bilal, Jonas; Steigmeier, Peter; Jundt, Gregor; Häusler, Samuel; Lenner, Miklós; Flöry, Nikolaus; Bittner, Matthias; Betschon, Felix
    Photonic integration on a chip has the potential to develop new low-cost, high-performance sensing devices. A proof of concept of the sensing capabilities of a waveguide-based photothermal interferometer for the measurement of traces of light-absorbing substances (soot particles, gases) has been achieved. The measurement principle can also be extended to a wide range of other applications such as refractive index measurements, or vibration/distance sensors. A unique feature is that the waveguide technology allows for a passive operation of the interferometer, i.e., no quadrature point control is required.
    04B - Beitrag Konferenzschrift
  • Vorschaubild
    Publikation
    Waveguide based passively demodulated photothermal interferometer for light absorption measurements of trace substances
    (Optica Publishing Group, 2023) Visser, Bradley; Bilal, Jonas; Flöry, Nikolaus; Wipf, Manuela; Steigmeier, Peter; Rüggeberg, Tobias; Betschon, Felix; Weingartner, Ernest
    01A - Beitrag in wissenschaftlicher Zeitschrift