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Imaging with a multichannel terahertz time-domain spectroscopy system at 1030 nm excitation wavelength

: Brahm, Anika; Wilms, Annika; Dietz, Roman; Göbel, Thorsten; Schell, Martin; Notni, Gunther; Tünnermann, Andreas


Institute of Electrical and Electronics Engineers -IEEE-:
39th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2014. Proceedings. Vol.1 : September 14-19, 2014, The University of Arizona, Tucson, AZ
Piscataway, NJ: IEEE, 2014
ISBN: 978-1-4799-3877-3
ISBN: 978-1-4799-3878-0
International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) <39, 2014, Tucson/Ariz.>
Conference Paper
Fraunhofer IOF ()
fiber lasers; photoconductivity; reflectometers; terahertz waves; detection channels; excitation wavelength; femtosecond fiber lasers; photoconductive antennas; simultaneous measurement; terahertz imaging

We present Terahertz imaging with a 1D multichannel time-domain spectroscopy system (TDS) which operates with a photoconductive array of 15 detection channels excited by a 1030 nm femtosecond fiber laser. The emitter and detector are photoconductive antennas based on InGaAs/InAlAs multi-layer heterostructures (MLHS). The simultaneous measurement of 15 THz pulses with a pixel pitch of 1 mm increases the measurement speed by factor 15.