Abstract To provide some references for researchers engaged in infrared multi gas detection, this study introduced the infrared multi gas detection system thoroughly from infrared light source, infrared detector, optical multiplexing structure, and detection method. Currently, the coherent source represented by quantum cascade laser has replaced the traditional incoherent source like thermal radiant infrared light source and became the dominant light source in infrared multi gas detection. Accordingly, the infrared photodetector is widely used. The optical multiplexing structure based on the “multiplexing thought” is the core of infrared multi gas detection system. It mainly includes the single-source multiplex detection structure and multi-source multiplexing detection structure. Nondispersive infrared spectroscopy, long optical distance spectroscopy, wavelength/frequency modulation spectroscopy, cavity enhancement spectroscopy, and photoacoustic spectroscopy are major detection methods used in the infrared multi gas detection. This has important significance to many fields, such as industrial and agriculture production, environmental monitoring, life science, etc.

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红外光谱吸收技术多气体检测仪综述

摘要 为了给从事红外多气体检测的研究人员提供一些参考，本研究从红外光源、红外探测器、光复用结构、检测方法等方面全面介绍了红外多气体检测系统。目前，以量子级联激光器为代表的相干光源已取代热辐射红外光源等传统的非相干光源，成为红外多气体检测中的主导光源。因此，红外光电探测器被广泛使用。基于“复用思想”的光复用结构是红外多气体检测系统的核心。主要包括单源复用检测结构和多源复用检测结构。非色散红外光谱，长光程光谱、波长/频率调制光谱、腔增强光谱和光声光谱是红外多气体检测中使用的主要检测方法。这对工农业生产、环境监测、生命科学等诸多领域具有重要意义。