Počet záznamů: 1  

The femtosecond optical frequency comb based tool for spectral analysis of molecular absorbtion gases

  1. 1.
    0385787 - ÚPT 2013 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
    Lešundák, Adam - Šmíd, Radek - Buchta, Zdeněk - Mikel, Břetislav - Lazar, Josef - Randula, A. - Číp, Ondřej
    The femtosecond optical frequency comb based tool for spectral analysis of molecular absorbtion gases.
    NANOCON 2012, 4th International Conference Proceedings. Ostrava: TANGER Ltd, 2012, s. 836-840. ISBN 978-80-87294-32-1.
    [NANOCON 2012. International Conference /4./. Brno (CZ), 23.10.2012-25.10.2012]
    Grant CEP: GA MPO FR-TI2/705; GA TA ČR TA01010995; GA ČR GAP102/10/1813; GA ČR GPP102/11/P819
    Institucionální podpora: RVO:68081731
    Klíčová slova: frequency comb * Fourier transform spectroscopy * interferometer * gas absorption
    Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika

    The spectral analysis of absorption of molecular gases belongs to very powerful methods for detection of concentration of gases in a tested sample. In case of the human breath it consists of hundreds of molecules of gasses and their concentrations are known as biomarkers. An increased concentration of more of them indicates certain diseases or symptoms. The presenting work covers a pilot experiment where femtosecond pulse probe laser and a detection chain based on cross-correlation makes an analysis of the specimen of the absorption gas. In the pilot experimental set-up the detection part utilizes a Michelson interferometer with movable measuring mirror. We developed a novel digital processing method for precise stabilization of the speed of the mirror during measuring process. The caught optical signals are calculated by the fast Fourier transform from the time to wavelength domain. The first caught spectra of the femtosecond beam passing trough the specimens show absorption lines of one isotope of acetylene which was tested as the first sample. The work proofed positive the possibility of using the femtosecond laser for detection of broadband absorption spectra in the infrared region.
    Trvalý link: http://hdl.handle.net/11104/0215561

     
     
Počet záznamů: 1  

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