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Updated: Oct 5, 2025

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
Experimental realization of visible gas sensing technology based on spatial heterodyne spectroscopy
Wen-Li Zhang1,2, Zhao-Yu Liu3,4, Kun Liang3,4
1Zhengzhou University of Aeronautics, Henan, 450002, China. 20151201003@cqu.edu.cn.
Abstract:
Based on the characteristics of optical absorption gas sensing technology (OA-GST) and spatial heterodyne spectroscopy (SHS), a novel type of visual gas sensing technology (V-GST) can present the invisible gas information in the form of two-dimensional visual fingerprint, which has attracted people's attention. In this paper, we have realized the NO2 detection of V-GST in the laboratory environment for the first time. Experimental results show that: V-GST not only has different interferogram response to different spectra, but also has good response to different concentrations of NO2, which lays a foundation for the application of this technology in gas sensing. And the average classification recognition rate of the system for different band NO2 response data is over 80%, which verifies the effectiveness of the V-GST in gas detection.
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