中国物理B ›› 2018, Vol. 27 ›› Issue (10): 100601-100601.doi: 10.1088/1674-1056/27/10/100601

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Absolute density measurement of nitrogen dioxide with cavity-enhanced laser-induced fluorescence

Zheng-Hai Yang(杨正海), Yong-Cheng Yang(杨永成), Lian-Zhong Deng(邓联忠), Jian-Ping Yin(印建平)   

  1. State Key Laboratory of Precision Spectroscopy, School of Physics and Material, East China Normal University, Shanghai 200062, China
  • 收稿日期:2018-05-21 修回日期:2018-08-10 出版日期:2018-10-05 发布日期:2018-10-05
  • 通讯作者: Lian-Zhong Deng E-mail:lzdeng@phy.ecnu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11504112, 91536218, and 11604100).

Absolute density measurement of nitrogen dioxide with cavity-enhanced laser-induced fluorescence

Zheng-Hai Yang(杨正海), Yong-Cheng Yang(杨永成), Lian-Zhong Deng(邓联忠), Jian-Ping Yin(印建平)   

  1. State Key Laboratory of Precision Spectroscopy, School of Physics and Material, East China Normal University, Shanghai 200062, China
  • Received:2018-05-21 Revised:2018-08-10 Online:2018-10-05 Published:2018-10-05
  • Contact: Lian-Zhong Deng E-mail:lzdeng@phy.ecnu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11504112, 91536218, and 11604100).

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摘要：

The absolute number density of nitrogen dioxide (NO2) seeded in argon is measured with cavity-enhanced laser-induced fluorescence (CELIF) through using a pulsed laser beam for the first time. The cavity ring down (CRD) signal is acquired simultaneously and used for normalizing the LIF signal and determining the relationship between the measured CELIF signal and the NO2 number density. The minimum detectable NO2 density down to (3.6±0.1)×108 cm-3 is measured in 60 s of acquisition time by the CELIF method. The minimum absorption coefficient is measured to be (2.0±0.1)×10-10 cm-1, corresponding to a noise equivalent absorption sensitivity of (2.2±0.1)×10-9 cm-1·Hz-1/2. The experimental system demonstrated here can be further improved in its sensitivity and used for environmental monitoring of outdoor NO2 pollution.

关键词: cavity-enhanced laser-induced fluorescence (CELIF), cavity ring down (CRD)

Abstract:

The absolute number density of nitrogen dioxide (NO2) seeded in argon is measured with cavity-enhanced laser-induced fluorescence (CELIF) through using a pulsed laser beam for the first time. The cavity ring down (CRD) signal is acquired simultaneously and used for normalizing the LIF signal and determining the relationship between the measured CELIF signal and the NO2 number density. The minimum detectable NO2 density down to (3.6±0.1)×108 cm-3 is measured in 60 s of acquisition time by the CELIF method. The minimum absorption coefficient is measured to be (2.0±0.1)×10-10 cm-1, corresponding to a noise equivalent absorption sensitivity of (2.2±0.1)×10-9 cm-1·Hz-1/2. The experimental system demonstrated here can be further improved in its sensitivity and used for environmental monitoring of outdoor NO2 pollution.

Key words: cavity-enhanced laser-induced fluorescence (CELIF), cavity ring down (CRD)

中图分类号:  (Measurement and error theory)

  • 06.20.Dk
42.62.Fi (Laser spectroscopy) 07.88.+y (Instruments for environmental pollution measurements)