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Semiconductor laser based THz generation and detection
C. Brenner1, S. Hoffmann2, C.-S. Friedrich1, T. Schlauch1, A. Klehr4, G. Erbert4, G. Tränkle4, C. Jördens3, M. Salhi3, M. Koch3, and M.R. Hofmann1
1 Institute for Photonics and Terahertz-Technology, Ruhr-University Bochum, 44780 Bochum, Germany
2 photonIQ Technologies GmbH, Universitätsstraße 142, 44799 Bochum, Germany
3 Institut für Hochfrequenztechnik, Technische Universität Braunschweig, Schleinitzstr. 22, 38106 Braunschweig, Germany
4 Ferdinand-Braun-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
Published in:
phys. stat. sol. (c) 1-4, (2008).
© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Personal use of this material is permitted. However, permission to reprint/republish this material for
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Abstract:
We present different concepts for compact and cost effective
THz technology based on semiconductor diode lasers. First,
we discuss THz sources starting with modelocked diode lasers
for time domain THz sampling, and two-colour diode lasers
for continuous wave THz generation. Then we show how
THz radiation can be generated directly out of two-colour diode
lasers and discuss possible schemes for an optimisation
of this effect towards application relevant power levels. Finally,
we demonstrate that diode lasers can also serve as detectors
for THz radiation. We couple the emission of a THz
gas laser into the active region of a diode laser and demonstrate
that this leads to a variation of the voltage over the p-njunction
which is almost proportional to the THz power coupled
into the device.
PACS:
07.57.Hm, 07.57.Kp, 42.55.Px, 42.60.Fc, 42.65.Ky, 78.47.J-
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