基于Fournier-Forand和Henyey-Greenstein体积散射函数的水中光脉冲传输仿真分析

Simulative Study of Optical Pulse Propagation in Water Based on Fournier-Forand and Henyey-Greenstein Volume Scattering Functions

结合Fournier-Forand和Henyey-Greenstein体积散射函数,利用Monte Carlo法建立水中激光脉冲传输特性分析模型。采用该模型分析了散射体相对折射率和尺寸分布对水中光脉冲传输特性的影响。研究表明:光脉冲在水中传输时,随着散射体相对折射率的增大和小尺度散射体相对含量的增加,脉冲展宽增加,光波前向散射减弱且空间分布扩展加剧,到达角分布更离散。与传统水中光脉冲传输仿真模型相比,此模型更加有效。

A simulative model with Monte Carlo method is established based on Fournier-Forand and Henyey-Greenstein volume scattering functions, by which propagation characteristics of optical pulse underwater can be analyzed. By using this model, the influence of scattering particles′ relative refractive index and size distribution on optical pulse propagation in water is analyzed. The results show that, with the increase of the relative refractive index of scattering particles and small scattering particles′ relative quantity, the width of optical pulse is broadened more evidently in time domain, the forward scattering becomes weaker with a more disperse space distribution and arrival angles′ distribution. Compared with traditional simulative models, the method presented is more effective.