Intelligent Algorithm-Assisted Indirect Absorption Spectroscopy for Trace Gas Sensing
- 1National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, China
- 2Zhengzhou Advanced Research Institute, Harbin Institute of Technology, Zhengzhou 450008, China
Abstract
Photoacoustic spectroscopy (PAS), quartz-enhanced photoacoustic spectroscopy (QEPAS), and light-induced thermoelastic spectroscopy (LITES) represent indirect absorption spectroscopy techniques for trace gas sensing, whose performance has long been advanced through hardware-oriented enhancement strategies. However, as hardware technologies continue to advance, conventional hardware-based enhancements are increasingly bottlenecked by weak responses, complex cross-interferences, and coupled multiphysics parameters. To transcend these limitations, algorithm-assisted methods, including traditional algorithms, machine learning, deep learning, and intelligent optimization, are being systematically integrated into these spectroscopic systems. This review summarizes recent progress in intelligent indirect absorption spectroscopy from three interconnected dimensions. First, we outline advanced signal processing and spectral reconstruction strategies designed to achieve weak-signal recovery and background noise suppression. Second, the focus shifts to data-driven parameter inversion, showing how multidimensional artificial intelligence models contribute to concentration retrieval, environmental compensation, multicomponent recognition, spectral-overlap decoupling, and front-back-end collaborative waveform coding and demultiplexing. Third, intelligent system optimization is examined, in which surrogate modeling, swarm-intelligence search, physics-guided topology optimization and multi-objective algorithms are employed to improve the design efficiency of the key elements such as photoacoustic resonators and multipass cells (MPCs). Additionally, prospects for future technological developments are also discussed in the concluding section.
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BibTeX
@article{huang2026intelligent,
title = {{Intelligent Algorithm-Assisted Indirect Absorption Spectroscopy for Trace Gas Sensing}},
author = {Yangkun Huang and Ying He and Shunda Qiao and Haiyue Sun and Yufei Ma},
journal = {Sensors},
year = {2026},
month = jun,
doi = {10.3390/s26134054},
url = {https://doi.org/10.3390/s26134054},
note = {CC BY},
}
RIS
TY - JOUR
TI - Intelligent Algorithm-Assisted Indirect Absorption Spectroscopy for Trace Gas Sensing
AU - Yangkun Huang
AU - Ying He
AU - Shunda Qiao
AU - Haiyue Sun
AU - Yufei Ma
PY - 2026
DA - 2026/06/25
JO - Sensors
DO - 10.3390/s26134054
UR - https://doi.org/10.3390/s26134054
AB - Photoacoustic spectroscopy (PAS), quartz-enhanced photoacoustic spectroscopy (QEPAS), and light-induced thermoelastic spectroscopy (LITES) represent indirect absorption spectroscopy techniques for trace gas sensing, whose performance has long been advanced through hardware-oriented enhancement strategies. However, as hardware technologies continue to advance, conventional hardware-based enhancements are increasingly bottlenecked by weak responses, complex cross-interferences, and coupled multiphysics parameters. To transcend these limitations, algorithm-assisted methods, including traditional algorithms, machine learning, deep learning, and intelligent optimization, are being systematically integrated into these spectroscopic systems. This review summarizes recent progress in intelligent indirect absorption spectroscopy from three interconnected dimensions. First, we outline advanced signal processing and spectral reconstruction strategies designed to achieve weak-signal recovery and background noise suppression. Second, the focus shifts to data-driven parameter inversion, showing how multidimensional artificial intelligence models contribute to concentration retrieval, environmental compensation, multicomponent recognition, spectral-overlap decoupling, and front-back-end collaborative waveform coding and demultiplexing. Third, intelligent system optimization is examined, in which surrogate modeling, swarm-intelligence search, physics-guided topology optimization and multi-objective algorithms are employed to improve the design efficiency of the key elements such as photoacoustic resonators and multipass cells (MPCs). Additionally, prospects for future technological developments are also discussed in the concluding section.
SN - 1424-8220
ER -