Detection of Atmospheric NO<sub>2</sub> Using Scheimpflug DIAL with a Blue External Cavity Diode Laser Source
Nitrogen dioxide (NO<sub>2</sub>) is broadly acknowledged as one of the six key air pollutants, posing a significant threat to environmental stability and human health. The profile of atmospheric nitrogen dioxide is required for quantifying NO<sub>2</sub> emissions from fossi...
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2025-01-01
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| Online Access: | https://www.mdpi.com/2073-4433/16/2/138 |
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| author | Cheng Yao Weixuan Luo Anping Xiao Xiqing Peng Bin Zhang Longlong Wang Qiang Ling Yan Zhou Zuguang Guan Daru Chen |
| author_facet | Cheng Yao Weixuan Luo Anping Xiao Xiqing Peng Bin Zhang Longlong Wang Qiang Ling Yan Zhou Zuguang Guan Daru Chen |
| author_sort | Cheng Yao |
| collection | DOAJ |
| description | Nitrogen dioxide (NO<sub>2</sub>) is broadly acknowledged as one of the six key air pollutants, posing a significant threat to environmental stability and human health. The profile of atmospheric nitrogen dioxide is required for quantifying NO<sub>2</sub> emissions from fossil fuel combustion and industry. In continuous-wave differential absorption lidar (CW-DIAL) systems, the laser sources employed are subject to the issues of varying output characteristics and poor instability. This study presents a CW-DIAL system for remote sensing of atmospheric NO<sub>2</sub> that employs a compact grating-based external cavity diode laser (ECDL) and Scheimpflug imaging. The laser in this system utilizes a piezoelectric transducer (PZT) for precise wavelength tuning, emitting at 448.1 nm and 449.7 nm with an output power of 2.97 W and a narrow linewidth of 0.16 nm. Signal capturing was achieved through a Newtonian telescope with a diameter of 200 mm and a 45° inclined CCD image sensor, satisfying the Scheimpflug principle. A case study near road traffic was used to verify the feasibility of ECDL-DIAL, which took place from 1 October to 2 October 2023 over an industrial park. The system generates precise NO<sub>2</sub> distribution maps with sub-50 m resolution over 3 km, updating every 10 min. |
| format | Article |
| id | doaj-art-794d34afb04c47f9b4e4c0c2c19f0a64 |
| institution | DOAJ |
| issn | 2073-4433 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Atmosphere |
| spelling | doaj-art-794d34afb04c47f9b4e4c0c2c19f0a642025-08-20T02:44:47ZengMDPI AGAtmosphere2073-44332025-01-0116213810.3390/atmos16020138Detection of Atmospheric NO<sub>2</sub> Using Scheimpflug DIAL with a Blue External Cavity Diode Laser SourceCheng Yao0Weixuan Luo1Anping Xiao2Xiqing Peng3Bin Zhang4Longlong Wang5Qiang Ling6Yan Zhou7Zuguang Guan8Daru Chen9Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, ChinaHangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, ChinaHangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, ChinaHangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, ChinaHangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, ChinaHangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, ChinaHangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, ChinaHangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, ChinaHangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, ChinaHangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, ChinaNitrogen dioxide (NO<sub>2</sub>) is broadly acknowledged as one of the six key air pollutants, posing a significant threat to environmental stability and human health. The profile of atmospheric nitrogen dioxide is required for quantifying NO<sub>2</sub> emissions from fossil fuel combustion and industry. In continuous-wave differential absorption lidar (CW-DIAL) systems, the laser sources employed are subject to the issues of varying output characteristics and poor instability. This study presents a CW-DIAL system for remote sensing of atmospheric NO<sub>2</sub> that employs a compact grating-based external cavity diode laser (ECDL) and Scheimpflug imaging. The laser in this system utilizes a piezoelectric transducer (PZT) for precise wavelength tuning, emitting at 448.1 nm and 449.7 nm with an output power of 2.97 W and a narrow linewidth of 0.16 nm. Signal capturing was achieved through a Newtonian telescope with a diameter of 200 mm and a 45° inclined CCD image sensor, satisfying the Scheimpflug principle. A case study near road traffic was used to verify the feasibility of ECDL-DIAL, which took place from 1 October to 2 October 2023 over an industrial park. The system generates precise NO<sub>2</sub> distribution maps with sub-50 m resolution over 3 km, updating every 10 min.https://www.mdpi.com/2073-4433/16/2/138Scheimpflug lidarnitrogen dioxideexternal cavity diode laser |
| spellingShingle | Cheng Yao Weixuan Luo Anping Xiao Xiqing Peng Bin Zhang Longlong Wang Qiang Ling Yan Zhou Zuguang Guan Daru Chen Detection of Atmospheric NO<sub>2</sub> Using Scheimpflug DIAL with a Blue External Cavity Diode Laser Source Atmosphere Scheimpflug lidar nitrogen dioxide external cavity diode laser |
| title | Detection of Atmospheric NO<sub>2</sub> Using Scheimpflug DIAL with a Blue External Cavity Diode Laser Source |
| title_full | Detection of Atmospheric NO<sub>2</sub> Using Scheimpflug DIAL with a Blue External Cavity Diode Laser Source |
| title_fullStr | Detection of Atmospheric NO<sub>2</sub> Using Scheimpflug DIAL with a Blue External Cavity Diode Laser Source |
| title_full_unstemmed | Detection of Atmospheric NO<sub>2</sub> Using Scheimpflug DIAL with a Blue External Cavity Diode Laser Source |
| title_short | Detection of Atmospheric NO<sub>2</sub> Using Scheimpflug DIAL with a Blue External Cavity Diode Laser Source |
| title_sort | detection of atmospheric no sub 2 sub using scheimpflug dial with a blue external cavity diode laser source |
| topic | Scheimpflug lidar nitrogen dioxide external cavity diode laser |
| url | https://www.mdpi.com/2073-4433/16/2/138 |
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