A simple thickness measurement method based on the coherent homodyne CW THz system
was demonstrated; it does not require precise control of the frequencies of the beat source …

In this study, inspired by the frequency-modulated continuous-wave (FMCW) method, an
operation scheme of continuous-wave (CW) terahertz (THz) homodyne system is proposed …

We present a tunable multifrequency continuous wave terahertz spectrometer based on two
laser diodes, photoconductive antennas, and a coherent detection scheme. The system is …

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 …

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 …

By applying the frequency conversion technique to 4-dimethylamino-N-methyl-4-
stilbazolium tosylate crystal, a monochromatic terahertz (THz) measurement system …

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 …

Terahertz (THz) waves have been exploited for the non-contact measurements of thickness
and refractive index, which has enormous industrial applicability. In this work, we …

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

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 …