[en] Measurements of electric field changes near the laser tube can be a source of new information of phenomena in the laser plasma. The authors studied a phenomenon called 'antenna effect' which can be used for laser stabilization. The experimental set-up is presented. A bar of metallic foil wound around the water-jacket of CO₂ laser plasma tube was used as a probe ('antenna'). The antenna effect technique provides a convenient method for observing the laser signiture. The antenna effect was used successfully for detectorless stabilization of a laser frequency and in plasma diagnostic set-up. (author)

[en] An estimation of the dehydration kinetics of monohydrated D-glucose with the use of the Bayesian spectral source separation algorithm is described. The dehydration experiment was probed with the terahertz time domain spectroscopy (THz-TDS). Contrary to the widely used peak-area method, our approach to the quantitative analysis takes into account the full spectral information. The obtained concentration profiles at different temperatures were processed in order to measure the kinetics of the dehydration process. Our investigation shows that the proposed method may be used to estimate the evolution of concentration despite the overlapping peaks and multiple spectral sources in the observed spectra.