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 …

Broadband spectroscopy is an invaluable tool for measuring multiple gas-phase species
simultaneously. In this work we review basic techniques, implementations, and current …

In this paper, a novel highly sensitive methane (CH 4) and acetylene (C 2 H 2) dual-gas light-
induced thermoelectric spectroscopy (LITES) sensor based on Lissajous space-division …

Enhancement of trace gas detectability using photoacoustic spectroscopy requires the
effective suppression of strong background noise for practical applications. An upgraded …

We present a compact sensor for carbon monoxide (CO) in air and exhaled breath based on
a room temperature interband cascade laser (ICL) operating at 4.69 µm, a low-volume …

A palm-sized laser spectrometer has been developed for detecting trace gases based on
tunable diode laser absorption spectroscopy in combination with a novel double-layer …

Tunable terahertz (THz)-wave absorption spectroscopy is a promising technique to detect
trace gases suspended in ambient air owing to their strong absorption fingerprints in the THz …

Optical fiber acoustic sensors with miniature size and high sensitivity are attractive to
develop compact photoacoustic spectroscopy. Here, a compact photoacoustic gas sensor …

Selectivity is one of the most crucial figures of merit in trace gas sensing, and thus a
comprehensive assessment is necessary to have a clear picture of sensitivity, selectivity …

The synthesis of multiple narrow optical spectral lines, precisely and independently tuned
across the near-to mid-infrared region, is a pivotal research area that enables selective and …