Progress on Measurement of Atmospheric Aerosol Particle Absorption with Photo-Thermal Interferometry

Abstract

Abstract:

Photo-thermal interferometry, which is highly sensitive, real-time and free-effected by light scattering, can directly measure the absorption coefficient without changing atmospheric aerosol state. It is firstly elaborated that the basic principles of photo-thermal interferometry for measuring aerosol absorption coefficient. Several typical photo-thermal interferometers are analyzed, including Mach-Zehnder interferometer, Fabry-Perot interferometer, Jamin interferometer and folded Jamin interferometer. Then the research process of this method and corresponding unsolved problems are brought out. On this basis, a fiber structure photo-thermal interferometer test device is developed. Finally, the future trend of this method is concluded.

Key words: photo-thermal interferometry, aerosol absorption, Mach-Zehnder interferometer, Jamin interferometer

CLC Number:

P413

LI Shu-Wang, SHAO Shi-Yong, MEI Hai-Ping, HUANG Yin-Bo, ZHU Wen-Yue, RAO Rui-Zhong. Progress on Measurement of Atmospheric Aerosol Particle Absorption with Photo-Thermal Interferometry[J]. Journal of Atmospheric and Environmental Optics, 2014, 9(6): 409-420.

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