Shao Jie, Lathdavong Lemthong, Westberg Jonas, Kluczynski Pawel, Lundqvist Stefan, Axner Ove
Institute of Information Optics of Zhejiang Normal University, 321004 Jinhua, China.
Appl Opt. 2010 Oct 10;49(29):5614-25. doi: 10.1364/AO.49.005614.
A first demonstration of Faraday modulation spectrometry (FAMOS) of nitric oxide (NO) addressing its strong electronic X(2)Π(ν″ = 0) - A(2)Σ(+)(ν(') = 0) band is presented. The instrumentation was constructed around a fully diode-laser-based laser system producing mW powers of ultraviolet light targeting the overlapping Q(22)(21/2) and R(12)Q(21/2) transitions at ∼226.6 nm. The work verifies a new two-transition model of FAMOS addressing the electronic transitions in NO given in an accompanying work. Although the experimental instrumentation could address neither the parameter space of the theory nor the optimum conditions, the line shapes and the pressure dependence could be verified under low-field conditions. NO could be detected down to a partial pressure of 13 µTorr, roughly corresponding to 10 ppb·m for an atmospheric pressure sample, which demonstrates the feasibility of FAMOS for sensitive detection of NO addressing its strong electronic band.
首次展示了针对一氧化氮（NO）的强电子X(2)Π(ν″ = 0) - A(2)Σ(+)(ν(') = 0)带的法拉第调制光谱法（FAMOS）。该仪器围绕一个完全基于二极管激光器的激光系统构建，该系统产生毫瓦级的紫外光，其目标是在约226.6纳米处的重叠Q(22)(21/2)和R(12)Q(21/2)跃迁。这项工作验证了在一篇配套论文中给出的针对NO中电子跃迁的FAMOS新双跃迁模型。尽管实验仪器既无法涉及理论的参数空间，也无法达到最佳条件，但在低场条件下可以验证线形和压力依赖性。NO的检测下限可达13微托的分压，对于大气压样品，这大致对应于10 ppb·m，这证明了FAMOS针对其强电子带灵敏检测NO的可行性。
