Sensors are perhaps the most important and integral components of our modern society.
With global warming and environmental pollution garnering ever-increasing attention, as …

Photothermal spectroscopy with the optical pump-probe configuration has been used for
sensitive gas detection in hollow-core fibers. In this study, we demonstrate a new method of …

In this contribution we show how the Lorentz‐Lorenz and the Clausius‐Mosotti equations
are related to Beer's law. Accordingly, the linear concentration dependence of absorbance is …

Laser dispersion spectroscopy provides an attractive way of gas sensing by measuring
refractive index rather than absorption. The previous dispersion gas sensors were mostly …

Freejet experiments were conducted in the hypersonic flight-duplicated shock tunnel (JF-12)
to understand the detonation combustion mode in the combustor of a standing oblique …

We demonstrate for the first time the measurement of CO2 isotope ratios (13C/12C and
18O/16O) in a hollow waveguide (HWG) fiber using a mid-infrared heterodyne phase …

Heterodyne phase-sensitive dispersion spectrometer (HPSDS) retrieves the concentration of
gas samples by measuring the refractive index fluctuations near the molecular resonance …

Heterodyne phase-sensitive dispersion spectroscopy has emerged as a promising new
approach to gas-phase chemical sensing. The most common implementation of this method …

Quantitative, sensitive and in situ detection of ammonia (NH 3) is important for industrial
process monitoring and emission characterization. We demonstrate high-temperature NH 3 …

Quantitative measurement of temperature and concentration is of wide interest in
combustion diagnostics. In this paper, simultaneous temperature and water concentration …