海洋上行激光通信的蒙特卡罗模拟

Simulation of ocean upward laser telecommunication based on Monte Carlo method

将潜艇作为高斯分布激光源,通过蒙特卡罗方法数值模拟,研究了海洋上行激光通信中潜艇深度和风速对接收光子数目,空间分布及相对能量径向分布的影响。模拟结果显示,在相同风速条件下,随着潜艇深度的增加,接收光子数急剧下降,并且只在潜艇深度较浅时,接收平面上的光子分布才接近高斯分布。潜艇深度一定时,风速对接收光子数目以及接收光子的空间分布影响不大。风速一定时,对于相同的相对能量,潜艇深度越低,对应的区域半径越小,而相同潜艇深度时,风速对接收平面处光子相对能量径向分布的影响并无明显规律。

Using submarine as the Gaussian distribution laser source,the influences of submarine depth and wind speed on the number of received photons,spatial distribution and relative energy radial distribution in oceanic upward laser telecommunication were simulated based on Monte Carlo method.The simulation results show that,at the same wind speed,the number of received photons dramatically decreases when the submarine depth increases,and the pho-ton distribution at the receive surface will still be close to Gaussian distribution only when the submarine depth is small.When the submarine depth is fixed,the influences of wind speed on the number of received photons and their spatial distribution are both very small.When the wind speed is fixed,for the same relative energy,the corresponding radius reduces with the decrease of the submarine depth.When the submarine depth is fixed,the influence of the wind speed on the received photon′s relative energy radial distribution at the receive surface has no obvious rule.