The vast majority of gaseous chemical substances exhibit fundamental rovibrational
absorption bands in the mid-infrared spectral region (2.5–25 μm), and the absorption of light …

Tunable Diode Laser Absorption Spectroscopy (TDLAS), a trace gas sensing technology
based on infrared absorption spectroscopy, has been developed rapidly in the past few …

Laser absorption spectroscopy combined with spectral analysis has been extensively
investigated in detection and measurements of gas samples because of their broad …

A compact multi-gas sensor has been developed for simultaneous detection of atmospheric
carbon monoxide (CO), nitrous oxide (N2O), and methane (CH4). Instead of the traditional …

Owing to the overlapping and cross-interference of absorption lines in multicomponent
gases, the simultaneous measurement of such gases via laser absorption spectroscopy …

Human exhaled methane (CH 4) has essential significance in detecting intestinal flora. In
this study, a high-precision quartz tuning fork (QTF) based light-induced thermoelastic …

An ultra-high sensitivity sensor combining a mid-IR (MIR) interband cascade laser (ICL) at
center wavelength of 3.37 μm and a multi-pass cell (MPC) with a path-length of 580 m was …

For over a decade hollow-core fibers have been used in optical gas sensors in the role of
gas cells. However, very few examples of actual real-life applications of those sensors have …

A ppm-level CO sensor based on a 2f wavelength modulation spectroscopy (2f-WMS)
technique was developed for the application of SF_6 decomposition analysis in an electric …

The advantages of integrating infrared (IR) waveguide gas sensors on a chip include
compactness, low power consumption, and high selectivity. Mid-IR waveguide sensors …