Abstract

Laser absorption spectroscopy combined with spectral analysis has been extensively investigated in detection and measurements of gas samples because of their broad applicability for measuring more than one hundred species, such as O₂, CO₂, H₂O, HCl, NH₃, NO_x, and hydrocarbons. Recently, real-time detection and measurements of gas samples based on laser absorption spectroscopy have attracted considerable interest from various fields owing to their performance of robustness, fast response speed, high sensitivity, and good precision. Here, we review the commonly used infrared laser absorption spectroscopy techniques for real-time measurements and the significant optical equipment utilized in measuring systems. Then, we discuss practical applications based on infrared laser absorption spectroscopy which require real-time determination of gas component concentrations, including atmospheric environment monitoring, breath analysis, combustion diagnostics, and industrial applications. Finally, perspectives of real-time determination of gas component concentrations based on infrared laser absorption spectroscopy are presented.

摘要

激光吸收光谱结合光谱分析在气体样品的检测和测量中得到了广泛的研究，因为它们广泛适用于测量一百多种物质，如 O ₂、CO ₂、H ₂ O、HCl、NH ₃、NO _x, 和碳氢化合物。近年来，基于激光吸收光谱的气体样品实时检测和测量由于其鲁棒性、响应速度快、灵敏度高、精度好等特点，引起了各个领域的广泛关注。在这里，我们回顾了用于实时测量的常用红外激光吸收光谱技术以及测量系统中使用的重要光学设备。然后，我们讨论了基于红外激光吸收光谱的需要实时测定气体成分浓度的实际应用，包括大气环境监测、呼吸分析、燃烧诊断和工业应用。最后，