Infrared and Laser Engineering, Volume. 45, Issue s1, 111002(2016)
Photo-thermal interferometer measurement of absorbent constituents in atmosphere
The absorption of atmospheric aerosol particle affects earth′s radiation balance and laser transmission in atmosphere, especially high energy laser. The precise measurement of aerosol light absorption is paid more and more attention. The basic principles of the photo-thermal interferometry for measuring aerosol absorption coefficient, demodulation algorithms and calibration principle were introduced. A fiber structure photo-thermal interferometer instrument was developed, and the feasibility was verified by measuring the absorption of N2, NO2 and black carbon aerosol. Finally, quantitative analysis was executed with the standard NO2 gas at 532 nm whose detection limitation was 3.976 mg·m-3. The qualitative and quantitative analysis demonstrate that the fiber structure photo-thermal interferometer has great potential in practical aerosol absorption measurement.
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Li Shuwang, Shao Shiyong, Mei Haiping, Rao Ruizhong. Photo-thermal interferometer measurement of absorbent constituents in atmosphere[J]. Infrared and Laser Engineering, 2016, 45(s1): 111002
Category: 大气光学
Received: Jan. 5, 2016
Accepted: Feb. 3, 2016
Published Online: Jun. 12, 2016
The Author Email: Shuwang Li (lswang6@mail.ustc.edu.cn)