Chinese Optics Letters, 2012, 10 (5): 050102, Published Online: Jan. 16, 2012
Detection of chemical warfare agents based on quantum cascade laser cavity ring-down spectroscopy Download: 686次
010.1030 Absorption 140.5965 Semiconductor lasers, quantum cascade 300.6270 Spectroscopy, far infrared
Abstract
Chemical warfare agents (CWAs) are recognized as serious threats of terrorist acts against the civilian population. Minimizing the impact of these threats requires early detection of the presence of CWAs. Cavity ring-down spectroscopy (CRDS) is an exquisitely sensitive technique for the detection of trace gaseous species. In this letter, the CRDS technique is employed using a pulsed quantum cascade laser for the detection of dimethyl methylphosphonate (DMMP). A limit of DMMP detection of approximately 77 ppb is achieved. The best achievable sensitivity that corresponds to noise-equivalent absorption is approximately 2 \times 10-7cm-1.
Zhechao Qu, Chunming Gao, Yanling Han, Xiaosong Du, Bincheng Li. Detection of chemical warfare agents based on quantum cascade laser cavity ring-down spectroscopy[J]. Chinese Optics Letters, 2012, 10(5): 050102.