差分吸收激光雷达系统探测背景大气SO_2和NO_2
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摘要
研制了一套可用于探测背景大气SO_2和NO_2的差分吸收激光雷达系统。该系统利用两台Nd…YAG激光器的二倍频和三倍频产生532nm/355nm的激光,分别去抽运四台窄线宽的染料激光器,从而获得测量大气SO_2和NO_2分布所需的两对激光波长300.05nm/301.5nm和446.6nm/448.1nm。实验数据表明,在晴朗的天气条件下,当空间分辨率为15 m且积分时间为30 min时,大气SO_2和NO_2的测量精度分别可达±2.0×10~(-9)和±5.0×10~(-9),激光雷达探测的大气SO_2和NO_2平均浓度与当地气象部门同时间报告的浓度较一致,显示了差分吸收激光雷达技术监测低浓度SO_2和NO_2时空分布的能力。
A differential absorption lidar(DIAL)system has been developed for background atmospheric SO_2 and NO_2 measurements.Second harmonic and third harmonic(532 nm/355 nm)of two NdYAG lasers are used to pump four dye lasers,respectively.Two pairs of laser beams 300.05 nm/301.5 nm and 446.6 nm/448.1 nm are obtained for profiling atmospheric SO_2 and NO_2.Observation results show that accuracies of atmospheric SO_2 and NO_2 measurements under clear weather condition can be within±2.0×10~(-9) and ±5.0×10~(-9),respectively,when spatial resolution is set to 15 mand integration time is seted to 30 minutes.Averaged atmospheric SO_2 and NO_2 concentrations observed through SO_2/NO_2 DIAL conform with the results of meteorological department at the same time.It shows that DIAL technique has the ability to measure the space-time distribution of low concentration of SO_2 and NO_2.
A differential absorption lidar(DIAL)system has been developed for background atmospheric SO_2 and NO_2 measurements.Second harmonic and third harmonic(532 nm/355 nm)of two NdYAG lasers are used to pump four dye lasers,respectively.Two pairs of laser beams 300.05 nm/301.5 nm and 446.6 nm/448.1 nm are obtained for profiling atmospheric SO_2 and NO_2.Observation results show that accuracies of atmospheric SO_2 and NO_2 measurements under clear weather condition can be within±2.0×10~(-9) and ±5.0×10~(-9),respectively,when spatial resolution is set to 15 mand integration time is seted to 30 minutes.Averaged atmospheric SO_2 and NO_2 concentrations observed through SO_2/NO_2 DIAL conform with the results of meteorological department at the same time.It shows that DIAL technique has the ability to measure the space-time distribution of low concentration of SO_2 and NO_2.
引文
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[12] Chen Y F,Wang X B,Liu Q W,et al.Mobile SO2differential absorption lidar system[J]. Acta Photonica Sinica,2017,46(7):0701004.陈亚峰,王晓宾,刘秋武,等.车载二氧化硫差分吸收激光雷达系统[J].光子学报,2017,46(7):0701004.
[13] Liu Q W,Chen Y F,Wang J,et al.Design and implementation of NO2differential absorption lidar source[J].Laser Technology,2018,42(4):433-439.刘秋武,陈亚峰,王杰,等.差分吸收NO2激光雷达光源的设计与实现[J].激光技术,2018,42(4):433-439.
[14] Huang J,Hu S X,Cao K F,et al.Design of three dimensional scanning control system for air pollution monitoring lidar based on LabVIEW[J].Journal of Atmospheric and Environmental Optics,2013,8(2):124-129.黄见,胡顺星,曹开法,等.基于LabVIEW的测污激光雷达三维扫描控制系统的设计[J].大气与环境光学学报,2013,8(2):124-129.
[2] Edner H,Fredriksson K,Sunesson A,et al.Mobile remote sensing system for atmospheric monitoring[J].Applied Optics,1987,26(19):4330-4338.
[3] Fujii T,Fukuchi T,Goto N,et al.Dual differential absorption lidar for the measurement of atmospheric SO2of the order of parts in 109[J].Applied Optics,2001,40(6):949-956.
[4] Fukchi T,Goto N,Fujii T,et al.Error analysis of SO2 measurement by multiwavelength differential absorption lidar[J].Optical Engineering,1999,38(1):141-145.
[5] Goers U B.Laser remote sensing of sulfur dioxide and ozone with the mobile differential absorptionlidar ARGOS[J].Optical Engineering,1995,34(11):3097-3102.
[6] Toriumi R,Tai H,Takeuchi N.Tunable solid-state blue laser differential absorption lidar system for NO2monitoring[J].Optical Engineering,1996,35(8):2371-2375.
[7] K9lsch H J, Rairoux P, Wolf J P,et al.Simultaneous NO and NO2 DIAL measurement using BBO crystals[J].Applied Optics,1989,28(11):2052-2056.
[8] Zhang Y C,Hu H L,Tan K,et al.Development of a mobile lidar system for air pollution monitoring[J].Acta Optica Sinica,2004,24(8):1025-1031.张寅超,胡欢陵,谭锟,等.AML-1车载式大气污染监测激光雷达样机研制[J].光学学报,2004,24(8):1025-1031.
[9] Hu S X,Hu H L,Zhang Y C,et al.A new differential absorption lidar for NO2 measurements using Raman-shifted technique[J].Chinese Optics Letters,2003,1(8):435-437.
[10] Hu S X,Hu H L,Zhang Y C,et al.Differential absorption lidar for environmental SO2 measurements[J].Chinese Journal of Lasers,2004,31(9):1121-1126.胡顺星,胡欢陵,张寅超,等.差分吸收激光雷达测量环境SO2[J].中国激光,2004,31(9):1121-1126.
[11] Liu Q W,Wang X B,Chen Y F,et al.Detection of atmosphericNO2 concentrationbydifferential absorption lidar based on dye lasers[J].Acta Optica Sinica,2017,37(4):0428004.刘秋武,王晓宾,陈亚峰,等.基于染料激光器的差分吸收激光雷达探测大气NO2浓度[J].光学学报,2017,37(4):0428004.
[12] Chen Y F,Wang X B,Liu Q W,et al.Mobile SO2differential absorption lidar system[J]. Acta Photonica Sinica,2017,46(7):0701004.陈亚峰,王晓宾,刘秋武,等.车载二氧化硫差分吸收激光雷达系统[J].光子学报,2017,46(7):0701004.
[13] Liu Q W,Chen Y F,Wang J,et al.Design and implementation of NO2differential absorption lidar source[J].Laser Technology,2018,42(4):433-439.刘秋武,陈亚峰,王杰,等.差分吸收NO2激光雷达光源的设计与实现[J].激光技术,2018,42(4):433-439.
[14] Huang J,Hu S X,Cao K F,et al.Design of three dimensional scanning control system for air pollution monitoring lidar based on LabVIEW[J].Journal of Atmospheric and Environmental Optics,2013,8(2):124-129.黄见,胡顺星,曹开法,等.基于LabVIEW的测污激光雷达三维扫描控制系统的设计[J].大气与环境光学学报,2013,8(2):124-129.