Zhang Lizhu, Tian Guang, Li Jingsong, Yu Benli
School of Science, Tianjin University of Technology and Education, Tianjin 300220, China.
Appl Spectrosc. 2014;68(10):1095-107. doi: 10.1366/14-00001.
Infrared laser absorption spectroscopy (LAS) is a promising modern technique for sensing trace gases with high sensitivity, selectivity, and high time resolution. Mid-infrared quantum cascade lasers, operating in a pulsed or continuous wave mode, have potential as spectroscopic sources because of their narrow linewidths, single mode operation, tunability, high output power, reliability, low power consumption, and compactness. This paper reviews some important developments in modern laser absorption spectroscopy based on the use of quantum cascade laser (QCL) sources. Among the various laser spectroscopic methods, this review is focused on selected absorption spectroscopy applications of QCLs, with particular emphasis on molecular spectroscopy, industrial process control, combustion diagnostics, and medical breath analysis.
红外激光吸收光谱法（LAS）是一种很有前景的现代技术，可用于高灵敏度、高选择性且具有高时间分辨率地检测痕量气体。工作在脉冲或连续波模式下的中红外量子级联激光器，由于其线宽窄、单模工作、可调谐性、高输出功率、可靠性、低功耗和紧凑性，具有作为光谱源的潜力。本文综述了基于量子级联激光（QCL）源的现代激光吸收光谱学的一些重要进展。在各种激光光谱方法中，本综述聚焦于QCL的选定吸收光谱应用，特别强调分子光谱学、工业过程控制、燃烧诊断和医学呼吸分析。
