A near-infrared (NIR) dual-gas sensor has been developed for simultaneous detection of
atmospheric trace methane (CH 4) and carbon dioxide (CO 2). To realize high sensitivity …

Based on the quartz tuning fork enhanced photothermal spectroscopy (QEPTS) technology,
a long-distance free space gas detection system was proposed to monitor CH 4 leakage. A …

A compact, sensitive laser-based absorption sensor for multispecies monitoring of methane
(CH4), acetylene (C2H2) and ammonia (NH3) was developed using a compact multipass …

Exhaust parameters of an engine carry vital information that can help to understand its
transient duty cycles. We developed a mid-infrared wavelength modulation spectroscopic …

This paper develops a concentration retrieval technique based on the particle swarm
optimization (PSO) algorithm, which is used for a calibration-free wavelength modulation …

The line width of different line shapes is a very important parameter in absorption
spectroscopy sensing techniques. Based on the high sensitivity and low noise properties of …

In this paper, an attractive gas sensing technique based on fiber optical sensing ideal was
developed for the detection of multi-gas species simultaneously. Calibration-free laser …