跨介质上行激光传输的蒙特卡罗仿真

Monte Carlo simulation of uplink laser transmission across media

为了研究跨介质上行激光在传输过程中的分布与损耗特性,基于蒙特卡罗方法改进了现有的激光传输模型.假设水下激光为光子的集合且光强服从高斯分布,通过追踪大量光子的传输过程,获得统计结果以分析海面风速和水下传输距离对接收面上的光子分布与权重的影响.结果表明,当海面风速一定时,水下传输距离越远,光子分布越发散,中心位置权重急剧下降;当水下传输距离一定时,较低风速对光子分布影响不大,随着风速增加,光子分布的发散趋势明显.因此可知,海面较大风速和水下较远传输距离对跨介质上行激光传输有较大的影响.

In order to study the distribution and loss characteristics of the cross-media uplink laser during transmission,the existing laser transmission model is improved based on the Monte Carlo method.Assuming that the underwater laser source is a collection of photons and that the light intensity obeys the Gaussian distribution,by tracking the transmission process of a large number of photons,statistical results are obtained to analyze the effects of the wind speed and underwater transmission distance on the photon distribution and weight on the receiving surface.Results show that when the sea surface wind speed is constant,the underwater transmission distance is larger,and the photon distribution is more divergent,with the weight of the center location sharply decreasing.When the underwater transmission distance is constant,the lower wind speed on the sea surface has a little effect on the photon distribution.As the wind speed increases,the trend of divergence is obvious for the photon distribution.Therefore,both a large wind speed on the sea surface and a long distance of underwater transmission have a great influence on the laser transmission across the media.