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    Swept-wavelength lasers based on GaSb gain-chip technology for non-invasive biomedical sensing applications in the 1.7–2.5 μm wavelength range

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    Vizbaras, Augustinas; Šimonyt?, Ieva; Miasojedovas, Ar?nas; Trink?nas, Augustinas; Bu?i?nas, Tadas; Greibus, Mindaugas; Naujokait?, Greta; Torcheboeuf, Nicolas; Droz, Serge; Boiko, Dmitri L.; Dambrauskas, Žilvinas; Gulbinas, Antanas; Vizbaras, Kristijonas
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    Abstract
    The infrared spectral region beyond 1.7 μm is of utmost interest for biomedical applications due to strong overtone and combination absorption bands in a variety of important biomolecules such as lactates, urea, glucose, albumin, etc. In this article, we report on recent progress in widely tunable swept-wavelength lasers based on type-I GaSb gain-chip technology, setting a new state-of-the-art in the 1.7 – 2.5 μm range laser sources. We provide an application example for the spectroscopic sensing of several biomolecules in a cuvette as well as an experimental demonstration of a non-invasive in-vivo sensing of human serum albumin through the skin.
    Publication Reference
    Biomedical Optics Express, vol. 9 (10), pp. 4834-4849
    Year
    2018-10-01
    URI
    https://yoda.csem.ch/handle/20.500.12839/920
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