Pavlov, Sergey and Hübers, Heinz-Wilhelm and Greiner-Bär, Michael and Richter, Heiko and Mahler, Lukas and Tredicucci, Alessandro and Beere, Harvey and Ritchie, David (2008) High-resolution molecular spectroscopy with 2.5 THz quantum cascade lasers. In: Proc. of the 1st International Workshop "THz Radiation: Basic Research and Applications", pp. 21-23. Institute of Electrical and Electronics Engineers. TERA 2008, [2008-10-02 - 2008-10-04], Alushta (Ukraine). ISBN 978-1-4244-2687-4.
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Abstract
Quantum cascade lasers operating at about 2.5 terahertz have been implemented in a spectrometer for high resolution molecular spectroscopy. Linewidth, frequency tunability and frequency stability of the lasers were investigated by mixing their radiation with radiation from a 2.5 terahertz gas laser. Two first laser characteristics were found to be sufficient for Doppler-limited spectroscopy. For a demonstration of the spectrometer, absorption at rotational transitions of methanol was measured. The cascade lasers served as radiation source. A gas laser was used to determine the absolute frequency simultaneously with the detection of absorption signal by mixing the gas laser radiation with a part of that from cascade lasers. Amplitude as well as frequency modulation of the output power of the cascade lasers was used. The pressure broadening and the pressure shift of a rotational transition of methanol at 2.519 terahertz were determined.
Item URL in elib: | https://elib.dlr.de/55924/ | |||||||||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | |||||||||||||||||||||||||||
Title: | High-resolution molecular spectroscopy with 2.5 THz quantum cascade lasers | |||||||||||||||||||||||||||
Authors: |
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Date: | September 2008 | |||||||||||||||||||||||||||
Journal or Publication Title: | Proc. of the 1st International Workshop "THz Radiation: Basic Research and Applications" | |||||||||||||||||||||||||||
Refereed publication: | No | |||||||||||||||||||||||||||
Open Access: | No | |||||||||||||||||||||||||||
Gold Open Access: | No | |||||||||||||||||||||||||||
In SCOPUS: | No | |||||||||||||||||||||||||||
In ISI Web of Science: | No | |||||||||||||||||||||||||||
Page Range: | pp. 21-23 | |||||||||||||||||||||||||||
Publisher: | Institute of Electrical and Electronics Engineers | |||||||||||||||||||||||||||
ISBN: | 978-1-4244-2687-4 | |||||||||||||||||||||||||||
Status: | Published | |||||||||||||||||||||||||||
Keywords: | high-resolution molecular spectroscopy, THz cascade lasers | |||||||||||||||||||||||||||
Event Title: | TERA 2008 | |||||||||||||||||||||||||||
Event Location: | Alushta (Ukraine) | |||||||||||||||||||||||||||
Event Type: | international Conference | |||||||||||||||||||||||||||
Event Dates: | [2008-10-02 - 2008-10-04] | |||||||||||||||||||||||||||
Organizer: | IEEE Lasers and Electro-Optics Society (LEOS) | |||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport (old) | |||||||||||||||||||||||||||
HGF - Program: | Space (old) | |||||||||||||||||||||||||||
HGF - Program Themes: | W EW - Erforschung des Weltraums | |||||||||||||||||||||||||||
DLR - Research area: | Space | |||||||||||||||||||||||||||
DLR - Program: | W EW - Erforschung des Weltraums | |||||||||||||||||||||||||||
DLR - Research theme (Project): | W - Projekt SOFIA (old) | |||||||||||||||||||||||||||
Location: | Berlin-Adlershof | |||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Planetary Research > Terahertz and Infrared Sensors | |||||||||||||||||||||||||||
Deposited By: | Pavlov, Dr. Sergey | |||||||||||||||||||||||||||
Deposited On: | 25 Nov 2008 | |||||||||||||||||||||||||||
Last Modified: | 15 Jan 2010 00:21 |
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