In this Letter, a differential integrating sphere-based photoacoustic spectroscopy (PAS) gas
sensor is proposed for the first time to our knowledge. The differential integrating sphere …

The rapid growth of industry and the global drive for modernization have led to an increase
in gas emissions, which present significant environmental and health risks. As a result, there …

A linear spot-type multipass cell-enhanced fiber-optic photoacoustic gas microprobe is
proposed. To further reduce the volume of the gas chamber and enhance the photoacoustic …

The presence of an elevated amount of methane (CH4) in exhaled breath can be used as a
non-invasive tool to monitor certain health conditions. A compact, inexpensive and …

This manuscript reports the development and characterization of a methane gas sensor
based on a copper oxide/porous silicon (CuO/PS) heterostructure. The sensor integrates the …

A triple-range adjustable plane-concave multipass gas cell (PC-MPGC) was developed for
high-precision trace gas detection based on tunable diode laser absorption spectroscopy …

Interband cascade lasers typically have significantly lower threshold current and power
consumption than quantum cascade lasers. They can also have advantages regarding costs …

Single‐mode distributed feedback GaSb‐based interband cascade lasers with record
emission beyond 6.1 µm are presented. The results are based on an epitaxial design with …

The detection of alkane gases represents a powerful tool for the guidance of oil and gas
exploration activities. Based on tunable diode laser absorption spectroscopy (TDLAS), an …

The precise detection of trace gases in the atmosphere is vital for both environmental
preservation and human health. Addressing the inherent challenges in enhancing the …