Electrical Engineering Department, Princeton University, Princeton, NJ 08540, USA.
Sensors (Basel). 2012 Nov 28;12(12):16466-81. doi: 10.3390/s121216466.
In this paper we present a prototype instrument for remote open-path detection of nitrous oxide. The sensor is based on a 4.53 μm quantum cascade laser and uses the chirped laser dispersion spectroscopy (CLaDS) technique for molecular concentration measurements. To the best of our knowledge this is the first demonstration of open-path laser-based trace-gas detection using a molecular dispersion measurement. The prototype sensor achieves a detection limit down to the single-ppbv level and exhibits excellent stability and robustness. The instrument characterization, field deployment performance, and the advantages of applying dispersion sensing to sensitive trace-gas detection in a remote open-path configuration are presented.
本文提出了一种用于远程开路一氧化二氮检测的原型仪器。该传感器基于 4.53μm 量子级联激光器，并采用啁啾激光频散光谱（CLaDS）技术进行分子浓度测量。据我们所知，这是首次利用分子频散测量演示基于开路激光的痕量气体检测。该原型传感器的检测限低至单 ppbv 级，表现出优异的稳定性和鲁棒性。介绍了仪器特性、现场部署性能以及在远程开路配置中应用频散感测进行灵敏痕量气体检测的优势。
