计算物理 ›› 2013, Vol. 30 ›› Issue (3): 415-421.

• 论文 • 上一篇    下一篇

激光在烟幕中传输的蒙特卡罗模拟

王红霞, 刘代志, 宋仔标, 杨倪晨, 杨成莱   

  1. 第二炮兵工程大学, 陕西 西安 710025
  • 收稿日期:2012-09-07 修回日期:2012-12-28 出版日期:2013-05-25 发布日期:2013-05-25
  • 作者简介:王红霞(1962-),女,教授,博士,主要从事光电信息处理等方面的研究,E-mail:redlightw@163.tom
  • 基金资助:
    国家自然科学基金(60908044)资助项目

Monte Carlo Simulation of Laser Transmission Through a Smoke Screen

WANG Hongxia, LIU Daizhi, SONG Zibiao, YANG Nichen, YANG Chenglai   

  1. Second Artillery Engineering University, Xi'an 710025, China
  • Received:2012-09-07 Revised:2012-12-28 Online:2013-05-25 Published:2013-05-25

摘要: 建立蒙特卡罗计算模型,模拟计算1.06μm脉冲激光在石墨烟幕中的传输.分析透过率与石墨粒子粒径、烟幕浓度、烟幕厚度的关系,用卷积方法计算一定宽度的脉冲激光穿过烟幕后的波形,数值仿真δ脉冲和矩形脉冲激光在各种石墨烟幕中的时间展宽特性.模拟结果表明:石墨粒子存在一最佳半径(0.16μm),该半径的石墨粒子烟幕不仅使激光能量衰减最强,而且产生的时间展宽也最显著;激光脉冲宽度越小,其波形变化和时间展宽越显著,微秒量级脉宽的激光脉冲穿过烟幕后波形变化和时间展宽效应不明显.

关键词: 烟幕, 激光脉冲, 蒙特卡罗方法, 时间展宽, 透过率

Abstract: A Monte Carlo model is established to simulate transmission of 1.06 μm laser pulse in graphite smoke screen.Relation between transmittance and graphite particle size,smoke concentration,smoke thickness are analyzed.A convolution method is put forward to calculate waveform of pulse laser through smoke.For δ pulse laser and rectangular pulse laser with different width,time broadening is calculated.It shows that there is an optimal radius(0.16 μm) for graphite smoke particles,at which interference effect is the best for 1.06μm laser pulse.For rectangular pulse laser,the smaller pulse width is,the more remarkable change in pulse shape and temporal broadening are.For microseconds width laser pulse,pulse shape changes and temporal broadening are not obvious.

Key words: smoke screen, laser pulse, Monte Carlo method, temporal broadening, transmittance

中图分类号: