Featured Application Terahertz thickness gauging of polymers and paint layers; one-
hundred percent inspection of plastic pipes; process control. Abstract We apply a fast …

We present a low cost terahertz (THz) spectrometer with coherent detection based on two
simple and robust dipole antennas driven by two laser diodes. The spectrometer covers …

In many industrial fields, like automotive and painting industry, the thickness of thin layers is
a crucial parameter for quality control. Hence, the demand for thickness measurement …

The accuracy of any measurement with terahertz time-domain spectroscopy (THz-TDS)
depends strongly on knowing and supplying the precise sample thickness when processing …

We present a multilayer thickness measurement system based on optoelectronic continuous
wave THz spectroscopy. Due to its wide tuning range, high frequency resolution, and fast …

Terahertz time-domain spectroscopy systems driven by monolithic mode-locked laser
diodes (MLLDs) exhibit bandwidths exceeding 1 THz and a peak dynamic range that can …

A bstract We compare a state-of-the-art terahertz (THz) time domain spectroscopy (TDS)
system and a novel optoelectronic frequency domain spectroscopy (FDS) system with …

Terahertz time-domain spectroscopy (THz–TDS) relies heavily on knowing precisely the
thickness or refractive index of a material. In practice, one of these values is assumed to be …

Thin-film sensing with a film thickness much less than a wavelength is an important
challenge in conventional transmission-mode terahertz time-domain spectroscopy (THz …

In this contribution, we present a highly accurate approach for thickness measurements of
multi-layered automotive paints using terahertz time domain spectroscopy in reflection …