近海岸非视距紫外光传输平均大气散射系数经验表达式的建立

Establishment of empirical expression of mean atmospheric scattering coefficient for non-line-of-sight ultraviolet propagation in coastal area

针对当前紫外光传输过程中大气衰减效应难以量化,传统大气辐射传输模型软件(MODerate resolution atmospheric TRANsmission,MODTRAN)操作复杂且应用耗时长等问题,在近海岸场景下研究了紫外光传输过程中的大气衰减效应。在对近海岸场景下MODTRAN适用性验证的基础上,基于经典的Kim模型结构建立了近海岸非视距紫外光传输平均大气散射系数的经验表达式,可便捷计算非视距紫外光传输的大气散射系数。与MODTRAN计算结果相比误差较小,表明所建的平均大气散射系数经验表达式的结构合理且适用性较强,从而为紫外光通信信道研究和系统光学器件设计提供了参考依据。

Addressing the problems of difficult quantification of atmospheric attenuation effect,hard operation and time-consuming application of traditional moderate resolution atmospheric transmission(MODTRAN)software in the current ultraviolet propagation process,the atmospheric attenuation effect in the ultraviolet propagation process was researched in coastal area.On the basis of the applicability verification of MODTRAN in coastal area,the empirical expression of mean atmospheric scattering coefficient for non-line-of-sight(NLOS)ultraviolet propagation in coastal area was established based on the classical Kim model structure,which can calculate the atmospheric scattering coefficient of NLOS ultraviolet propagation conveniently.The small error in contrast with the MODTRAN computation indicates that the established empirical expression of mean atmospheric scattering coefficient has reasonable structure and strong applicability,and thus it can provide reference gist for the channel research and the system optics design of ultraviolet communication.