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Original title:
The femtosecond optical frequency comb based tool for spectral analysis of molecular absorbtion gases
Authors: Lešundák, Adam ; Šmíd, Radek ; Buchta, Zdeněk ; Mikel, Břetislav ; Lazar, Josef ; Randula, A. ; Číp, Ondřej
Document type: Papers
Conference/Event: NANOCON 2012. International Conference /4./, Brno (CZ), 2012-10-23 / 2012-10-25
Year: 2012
Language: eng
Abstract: 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.
Keywords: Fourier transform spectroscopy; frequency comb; gas absorption; interferometer
Project no.: FR-TI2/705 (CEP), TA01010995 (CEP), GAP102/10/1813 (CEP), GPP102/11/P819 (CEP)
Funding provider: GA MPO, GA TA ČR, GA ČR, GA ČR
Host item entry: NANOCON 2012, 4th International Conference Proceedings, ISBN 978-80-87294-32-1
Institution: Institute of Scientific Instruments AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0215561
Permalink: http://www.nusl.cz/ntk/nusl-135491
The record appears in these collections:
Research > Institutes ASCR > Institute of Scientific Instruments
Conference materials > Papers
Authors: Lešundák, Adam ; Šmíd, Radek ; Buchta, Zdeněk ; Mikel, Břetislav ; Lazar, Josef ; Randula, A. ; Číp, Ondřej
Document type: Papers
Conference/Event: NANOCON 2012. International Conference /4./, Brno (CZ), 2012-10-23 / 2012-10-25
Year: 2012
Language: eng
Abstract: 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.
Keywords: Fourier transform spectroscopy; frequency comb; gas absorption; interferometer
Project no.: FR-TI2/705 (CEP), TA01010995 (CEP), GAP102/10/1813 (CEP), GPP102/11/P819 (CEP)
Funding provider: GA MPO, GA TA ČR, GA ČR, GA ČR
Host item entry: NANOCON 2012, 4th International Conference Proceedings, ISBN 978-80-87294-32-1
Institution: Institute of Scientific Instruments AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0215561
Permalink: http://www.nusl.cz/ntk/nusl-135491
The record appears in these collections:
Research > Institutes ASCR > Institute of Scientific Instruments
Conference materials > Papers
Record created 2013-01-04, last modified 2021-11-24