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Detection of Nitric Oxide with Faraday Rotation Spectroscopy at 5.33 μm
赵卫雄
Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
Abstract:
We report the development of a static magnetic field (DC) Faraday rotation spectrometer (FRS) for NO detection. A 5.33 μm continuous-wave (CW) quantum cascade laser (QCL) was used as the probing laser. Line absorption at 1875.81 cm-1 (2Π3/2Q(3/2), ν = 1←0) was chosen for the detection. By using a Chernin type multipass cell, a detection precision of 1.15 ppbv (1σ, 1s) was achieved with an absorption pathlength of 108 m. This value was reduced to 0.43 ppbv by increasing the data-acquisition time to 15 s.
Key words:  Faraday rotation spectroscopy, Mid-infrared, Laser spectroscopy, Nitric oxide
FundProject:
Detection of Nitric Oxide with Faraday Rotation Spectroscopy at 5.33 μm
赵卫雄
安徽光机所
摘要:
We report the development of a static magnetic field (DC) Faraday rotation spectrometer (FRS) for NO detection. A 5.33 μm continuous-wave (CW) quantum cascade laser (QCL) was used as the probing laser. Line absorption at 1875.81 cm-1 (2Π3/2Q(3/2), ν = 1←0) was chosen for the detection. By using a Chernin type multipass cell, a detection precision of 1.15 ppbv (1σ, 1s) was achieved with an absorption pathlength of 108 m. This value was reduced to 0.43 ppbv by increasing the data-acquisition time to 15 s.
关键词:  Faraday rotation spectroscopy, Mid-infrared, Laser spectroscopy, Nitric oxide
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