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Laser Spectroscopy Sensing for Gas Detection

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Optical Sensors".

Deadline for manuscript submissions: 28 February 2026 | Viewed by 612

Special Issue Editor

National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, China
Interests: photoacoustic spectroscopy; quartz-enhanced photoacoustic spectroscopy; light-induced thermoelastic spectroscopy; TDLAS-multipass cell
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Special Issue Information

Dear Colleagues,

The precise, sensitive, and selective detection of gases is critical across numerous fields, including environmental monitoring, industrial process control, safety and security, medical diagnostics, and atmospheric research. Laser spectroscopy has emerged as a preeminent technology in this domain, offering unparalleled advantages such as high sensitivity, specificity, real-time response, and non-contact measurement capabilities. Recent advancements in laser sources, detectors, and spectroscopic techniques are continuously pushing the boundaries of performance, miniaturization, and cost-effectiveness.

This Special Issue of Sensors invites original research articles and comprehensive reviews focusing on the latest innovations and applications in laser spectroscopy for gas detection. Topics of interest include, but are not limited to, the following:

Advanced Techniques: Development and application of Tunable Diode Laser Absorption Spectroscopy (TDLAS), Cavity Ring-Down Spectroscopy (CRDS), Photoacoustic Spectroscopy (PAS), Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS), Light-induced thermoelastic spectroscopy (LITES), Integrated Cavity Output Spectroscopy (ICOS), Faraday Rotation Spectroscopy (FRS), Laser-Induced Fluorescence (LIF), and other novel laser spectroscopic methods.

Technology Enablers: Innovations in laser sources (QCLs, ICLs, DFBs, VCSELs), detectors, optical cavities, gas cells, waveguide structures, and signal processing algorithms enhancing sensitivity, selectivity, and robustness.

System Integration and Applications: Development of compact, portable, multi-gas, and distributed sensors; field deployment experiences; applications in environmental monitoring (GHGs, pollutants), industrial safety (leak detection, process control), breath analysis, security (explosives, CWAs), and fundamental science.

New Materials and Concepts: Exploration of novel materials for enhanced gas-light interaction or novel spectroscopic concepts for challenging detection scenarios.

We welcome contributions that demonstrate significant advances in the science, engineering, and practical implementation of laser spectroscopic gas sensors. Join us in showcasing the cutting-edge developments shaping the future of this vital sensing field.

Dr. Ying He
Guest Editor

Manuscript Submission Information

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Keywords

  • tunable diode laser absorption spectroscopy (TDLAS)
  • cavity ring-down spectroscopy (CRDS)
  • photoacoustic spectroscopy (PAS)
  • quartz-enhanced photoacoustic spectroscopy (QEPAS)
  • light-induced thermoelastic spectroscopy (LITES)
  • integrated cavity output spectroscopy (ICOS)
  • laser-induced fluorescence (LIF)
  • laser-induced breakdown spectroscopy (LIBS)
  • quantum cascade laser (QCL)
  • interband cascade lasers (ICL)

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Published Papers (1 paper)

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Research

22 pages, 5264 KB  
Article
Development of Compact Electronics for QEPAS Sensors
by Vincenzina Zecchino, Luigi Lombardi, Cristoforo Marzocca, Pietro Patimisco, Angelo Sampaolo and Vincenzo Luigi Spagnolo
Sensors 2025, 25(21), 6718; https://doi.org/10.3390/s25216718 - 3 Nov 2025
Viewed by 460
Abstract
Remarkable advances in Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) made it one of the most effective gas-sensing techniques in terms of sensitivity and selectivity. Consequently, its range of possible applications is continuously expanding, but in some cases is still limited by the cost and/or size [...] Read more.
Remarkable advances in Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) made it one of the most effective gas-sensing techniques in terms of sensitivity and selectivity. Consequently, its range of possible applications is continuously expanding, but in some cases is still limited by the cost and/or size of the equipment needed to im-plement a complete QEPAS sensor. In particular, bulky and expensive lab instruments are often used to realize the electronic building blocks required by this technique, which prevents, for instance, integration of the system on board a drone. This work addresses this issue by presenting the development of compact electronic modules for a QEPAS sensor. A very low-noise, fully differential preamplifier for the quartz tuning fork, with digital output and programmable gain, has been designed and realized. A compact FPGA board hosts both an accurate function generation module, which synthesizes the signals needed to modulate the laser source, and an innovative lock-in amplifier based on the CORDIC algorithm. QEPAS sensors based on the designed electronics have been used for the detection of H2O and CO2 in ambient air, proving the full functionality of all the blocks. These results highlight the potential of compact electronics to promote portable and cost-effective QEPAS applications. Full article
(This article belongs to the Special Issue Laser Spectroscopy Sensing for Gas Detection)
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