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Stefan Gorenflo, Iliyana Hinkov, Armin Lambrecht, Bernd Fischer, Matthias Hoffmann, Hanspeter Helm, Peter Uhd Jepsen

Low-Power Terahertz Time-Domain Spectroscopy with Optimized Electro-optical Detection

A Terahertz Time-Domain Spectroscopy (THz-TDS) system with electro-optical detector based on a ZnTe crystal is presented. The pump laser is a Ti:Sa laser with pulse duration of approx. 10 fs at a central wavelength of 800 nm. Using an optimized detection configuration, a signal-to-noise ratio better than 10³ is achieved, applying an optical laser power of only 25 mW. Several substances can be clearly distinguished on the basis of their specific THz absorption spectra.

tm – Technisches Messen, Oldenbourg Wissenschaftsverlag

Print ISSN: 0171-8096
Volume: 72, 07/2005
Pages: 430 - 439

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