Human exhaled breath consists of more than 3000 volatile organic compounds, many of
which are relevant biomarkers for various diseases. Although gas chromatography has been …

Fiber enhanced Raman spectroscopy (FERS) is a powerful multigas analysis technique. It
combines the unmatched analytical prowess of Raman spectroscopy with the enhancement …

Power-to-gas is a heavily discussed option to store surplus electricity from renewable
sources. Part of the generated hydrogen could be fed into the gas grid and lead to …

Common gaseous fuels are mixtures of several components. As the properties of the fuels
can vary with the composition, but combustion needs to be stable, reliable analytical …

The market of gas sensors is mainly governed by electrochemical, semiconductor, and non-
dispersive infrared absorption (NDIR)-based optical sensors. Despite offering a wide range …

A simple but highly effective method for enhancement of spontaneous Raman scattering
from gases is described. It employs a multimode blue laser diode that receives feedback …

Biogas production from organic raw materials is a highly complex biotechnological process.
The responsible anaerobic fermentation process is difficult to measure due to its multi-stage …

A setup is described with which the spontaneous Raman scattering rate from pressurized
gas samples is greatly enhanced inside a near-concentric optical cavity. The pump source is …

Spontaneous Raman scattering is an attractive optical technique for the analysis of gases
and liquids; however, their low densities and notoriously weak scattering cross sections …

An improved gas analyzer based on Raman spectroscopy is presented. The device can
measure the content of all molecular species of atmospheric air, whose concentration …