DocumentCode
644571
Title
High-frequency modulation spectroscopy with a THz quantum-cascade laser
Author
Eichholz, R. ; Richter, H. ; Wienold, M. ; Schrottke, L. ; Grahn, H.T. ; Hubers, Heinz-Wilhelm
Author_Institution
German Aerosp. Center (DLR), Berlin, Germany
fYear
2013
fDate
1-6 Sept. 2013
Firstpage
1
Lastpage
2
Abstract
A terahertz absorption spectrometer with a quantum-cascade laser (QCL) for high-resolution molecular spectroscopy is realized. The spectrometer is based on high-frequency (up to 50 MHz) modulation of the QCL frequency. This allows for the determination of the absorption coefficient and dispersion of the absorbing medium along with a very precise measurement of the line shape of the absorption feature. The design and performance of the spectrometer are presented, and its sensitivity and frequency calibration are discussed.
Keywords
measurement by laser beam; quantum cascade lasers; terahertz spectroscopy; absorbing media; high frequency modulation spectroscopy; high resolution molecular spectroscopy; terahertz absorption spectrometer; terahertz quantum cascade laser; Absorption; Frequency measurement; Frequency modulation; Measurement by laser beam; Quantum cascade lasers; Spectroscopy;
fLanguage
English
Publisher
ieee
Conference_Titel
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location
Mainz
Type
conf
DOI
10.1109/IRMMW-THz.2013.6665539
Filename
6665539
Link To Document