Multiple scattering and modeling of laser in fog

• 作 者: Ji-Yu Xue Yun-Hua Cao Zhen-Sen Wu Jie Chen Yan-Hui Li Geng Zhang Kai Yang Ruo-Ting Gao
• 机 构: School of Physics and Optoelectronic Engineering,Xidian University,Xi’an 710071,China;School of Envi
• 出 处: 中国物理B（英文版）
• 发表日期: 2021年6期
• 关键词: Mie theory Monte Carlo method engineering model multiple scattering error analys

When a laser is transmitted in fog,and the water droplets will scatter and absorb the laser,which affects the intensity of the laser transmission and the accuracy of radar detection.Therefore,it is of great significance to study the laser trans-mission in the fog.At present,the main method of calculating the scattering and attenuation characteristics of fog is based on the radiation transmission theory,which is realized by a large number of numerical calculations or physical simulation methods,which takes time and cannot meet the requirements for obtaining the fast and accurate results.Therefore,in this paper established are a new laser forward attenuation model and backward attenuation model in low visibility fog.It is found that in low visibility environments,the results calculated by the Monte Carlo method are more accurate than those from most of the existing forward attenuation models.For the cases of 0.86-μm,1.06-μm,1.315-μm,10.6-μm typical lasers incident on different fogs with different visibilities,a backscatter model is established,the error between the fitting result and the calculation result is analyzed,the backward attenuation fitting parameters of the new model are tested,and a more accurate fitting result is obtained.