THz sources and detectors based on diode lasers
C.-S. Friedricha, C. Brennera, S. Hoffmannb, T. Schlaucha, A. Klehrc, G. Erbertc, G. Tränklec, C. Jördensd, M. Salhid, M. Kochd, and M.R. Hofmanna
Published in:
Proc. SPIE, vol. 7197, no. 71970B (2009).
Abstract:
We demonstrate concepts for compact and cost effective THz technology based on semiconductor diode lasers. In detail, we analyze diode laser based THz sources and detectors. Continuous wave THz radiation is generated by two color diode lasers either with external photomixers or direct difference frequency generation in the diode laser. For time domain THz sampling applications we present a suitable mode-locked diode laser system. Further we present a method to detect THz radiation with diode lasers at room temperature: A THz signal coupled into the active region of a diode laser results in a variation of the voltage across the p-n-junction.
a Institute for Photonics and Terahertz-Technology, Ruhr-University Bochum, 44780 Bochum, Germany
b photonIQ Technologies GmbH, Universitätsstraße 142, 44799 Bochum, Germany
c Ferdinand-Braun-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Strasse 4, 12489 Berlin, Germany
d Institut für Hochfrequenztechnik, Technische Universität Braunschweig, Schleinitzstr. 22, 38106 Braunschweig, Germany
Keywords:
two color diode laser, THz sources, THz detectors, mode-locked diode laser
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