超短脉冲在散射介质中传播的时间和空间特性研究

Temporal and Spatial Characteristics of Ultrashort Pulse Propagation in Turbid Media

采用蒙特卡罗方法,研究了散射介质各向异性因子等参数对超短脉冲在散射介质中传播的时间和空间分布以及各散射阶次光子强度比例分布的影响。研究结果表明,当各向异性因子或吸收系数减小、散射系数或传播深度增大时,脉冲的时间展宽和空间扩散都随之增强,高散射阶次光子强度比例也随之增大。

The Monte Carlo method is introduced to simulate and analyze the influence of optical parameters of the turbid medium,such as anisotropy factor,on the temporal and spatial distributions and scattering-order distributions of ultrashort pulses.The result shows that when anisotropy factor or absorption coefficient decrease and scattering coefficient or propagation depth increase,both of the pulse duration and the beam size broaden and the proportion of scattering photons at high scattering orders increase.