High precision and fast measurement of gas concentrations is important for both
understanding and monitoring various phenomena, from industrial and environmental to …

We report on a study of light-induced thermo-elastic effects occurring in quartz tuning forks
(QTFs) when exploited as near-infrared light detectors in a tunable diode laser absorption …

Ammonia is one of the most prominent and hazardous water pollutants; hence its selective
and sensitive detection in water is crucial for monitoring water quality and determining its …

Trace gas sensors have a wide range of applications including air quality monitoring,
industrial process control, and medical diagnosis via breath biomarkers. Quartz-enhanced …

Two decades after their invention in 1994, quantum-cascade lasers (QCLs) become
increasingly important in the global infrared optoelectronics market. Photoacoustic …

Numerical research into the QCL tunability aspects in respect to being applied in chemical
substance detection systems is covered in this paper. The QCL tuning opportunities by …

Commercial and research QCL sources can target strong fundamental rotational-vibrational
gas absorption lines in the mid-IR spectral range and pure rotational lines in the terahertz …

The main limitations of tunable diode laser absorption spectroscopy (TDLAS) sensors are
represented by the high cost, limited detection bandwidth and low adaptability of …

A photoacoustic detection system (20) includes a detector (22) that has a chamber (24), a
pulsed light source (26), piezoelectric tuning forks (28), and a photosensor (30). The …

We discuss two different problems in applied mathematics. The first is related to the
modeling of a certain class of trace gas sensors. The second is the geophysical inverse …