Tell a friend
Print
High-resolution molecular spectroscopy with 2.5 THz quantum cascade lasers
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.
![[img]](http://elib.dlr.de/style/images/fileicons/application_pdf.png) | PDF - Registered users only - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 112Kb |
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.
| Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Title: | High-resolution molecular spectroscopy with 2.5 THz quantum cascade lasers | ||||||||||||||||||
| Authors: |
| ||||||||||||||||||
| Date: | September 2008 | ||||||||||||||||||
| Journal or Publication Title: | Proc. of the 1st International Workshop "THz Radiation: Basic Research and Applications" | ||||||||||||||||||
| Refereed publication: | 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 | ||||||||||||||||||
| HGF - Program: | Space | ||||||||||||||||||
| 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: | Dr. Sergey Pavlov | ||||||||||||||||||
| Deposited On: | 25 Nov 2008 | ||||||||||||||||||
| Last Modified: | 15 Jan 2010 00:21 |
Repository Staff Only: item control page
