激光大气湍流传输数值实验建模与计算机模拟

doi:10.16182/j.issn1004731x.joss.201806017

系统仿真学报 ›› 2018, Vol. 30 ›› Issue (6): 2133-2143.doi: 10.16182/j.issn1004731x.joss.201806017

激光大气湍流传输数值实验建模与计算机模拟

陈纯毅^{1, 2}, 杨华民^{1, 2}, 任斌², 蒋振刚²

1. 长春理工大学光电测控与光信息传输技术教育部重点实验室,长春 130022;
2. 长春理工大学计算机科学技术学院,长春 130022

收稿日期:2016-07-31 修回日期:2016-10-01 出版日期:2018-06-08 发布日期:2018-06-14
作者简介:陈纯毅(1981-),男,重庆,博士,教授,研究方向为光传输建模与仿真。
基金资助:
国家自然科学基金(61275080, 61475025, 61775022), 教育部博士点专项基金(20132216110002), 吉林省科技发展计划(20150101016JC, 20180519012JH)

Modeling and Computer Simulation of Numerical Experiments on Laser Propagation through Atmospheric Turbulence

Chen Chunyi^{1, 2}, Yang Huamin^{1, 2}, Ren Bin², Jiang Zhengang²

1. Key Laboratory of Photoelectric Measurement & Control and Optical Information Transfer Technology, Changchun University of Science and Technology, Changchun 130022, China;
2. School of Computer Science and Technology, Changchun University of Science and Technology, Changchun 130022, China

Received:2016-07-31 Revised:2016-10-01 Online:2018-06-08 Published:2018-06-14

摘要/Abstract

摘要： 针对激光大气湍流传输数值模拟问题,提出根据平均光强分布来确定光场网格采样保存区域的方法,设计出并行集群模拟方案。通过模拟实例,研究了准直基模高斯光束经大气湍流传输后的平均光强和拉盖尔-高斯光束经大气湍流传输后的空间模构成变化问题。分析结果表明：对水平传输情形,相对于高阶矩匹配法,用零阶矩匹配法确定随机相位屏大气相干参数能得到更高的模拟精度;大气湍流导致拉盖尔-高斯光束发生模间散射,其强度取决于绝对湍流强度以及光束的发射平面参数、径向指数和方位指数。

关键词: 数值建模, 计算机模拟, 激光, 大气湍流, 传输

Abstract: Focusing on numerical simulations of laser propagation in atmospheric turbulence, a method for determining the grid size of optical-field samples that need to be stored in a data file was first suggested, and a simulation scheme based on a parallel computer cluster was proposed. By performing simulation examples, both the average intensity of collimated fundamental Gaussian beams propagating through atmospheric turbulence and the change in spatial-mode composition of Laguerre-Gaussian (LG) beams travelling in atmospheric turbulence were studied. Analyses show that for the case of horizontal propagation, the use of a matching approach based on zero-order moment to determine the atmospheric coherence parameter associated with each random phase screen leads to greater simulation accuracy than the use of that based on higher-order moment; atmospheric turbulence results in inter-mode scattering of a propagated LG beam with its strength depending on the absolute turbulence level, transmitting-plane beam parameter, radial index and azimuthal index.

Key words: numerical modeling, computer simulation, laser, atmospheric turbulence, propagation

中图分类号:

TP391.9

陈纯毅, 杨华民, 任斌, 蒋振刚. 激光大气湍流传输数值实验建模与计算机模拟[J]. 系统仿真学报, 2018, 30(6): 2133-2143.

Chen Chunyi, Yang Huamin, Ren Bin, Jiang Zhengang. Modeling and Computer Simulation of Numerical Experiments on Laser Propagation through Atmospheric Turbulence[J]. Journal of System Simulation, 2018, 30(6): 2133-2143.

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激光大气湍流传输数值实验建模与计算机模拟

Modeling and Computer Simulation of Numerical Experiments on Laser Propagation through Atmospheric Turbulence

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