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Real-time Continuous Wave Terahertz Spectroscopy with 2 THz Bandwidth

: Liebermeister, L.; Nellen, S.; Kohlhaas, R.B.; Schell, M.; Globisch, B.


Institute of Electrical and Electronics Engineers -IEEE-:
IRMMW-THz 2018, 43rd International Conference on Infrared, Millimeter, and Terahertz Waves : 9-14 September 2018, Nagoya Congress Center, Nagoya, Japan
Piscataway, NJ: IEEE, 2018
ISBN: 978-1-5386-3809-5
ISBN: 978-1-5386-3808-8
ISBN: 978-1-5386-3810-1
International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) <43, 2018, Nagoya>
Conference Paper
Fraunhofer HHI ()

Until now, real-time acquisition of terahertz (THz) spectra has been an unique feature of time-domain spectroscopy (TDS) systems. However, fast acquisition of broadband THz signals can be a strength of continuous-wave (cw) THz as well, when a fast frequency tunable laser source is used. In this paper, we present a new continuous wave THz spectrometer capable of acquiring 2 THz-wide spectra with 1 GHz resolution at 8 Hz continuous update rate. To our knowledge, this is the first demonstration of a phase-sensitive cw THz spectrometer able to perform broadband acquisition in real-time.