摘要
针对工程应用中激光大气传输的特点和要求,分析大气湍流对激光传输影响的规律和大气湍流动态效应半实物仿真方法,提出一种多层大气相位屏数值模拟结合液晶空间光调制器(SLM)进行波前逆变换的激光大气湍流动态半实物仿真的技术途径。将多层大气相位屏的随机生成的相位数据序列经过计算机处理后注入光路中的液晶SLM,激光经过空间光调制后,远场得到激光光斑的随机相位和强度起伏分布。讨论了远场激光大气湍流效应环境模拟装置的基本理论方法、实验依据并进行了初步分析。利用该装置模拟可产生不同类型湍流,并进行湍流效应对远场光斑影响的验证实验。本文方法具有实时性好、动态控制、扩展性强和可介入半实物仿真系统的特点,是激光大气传输建模与实现半实物仿真的技术途径之一。
In order to meet the demands of laser propagation in applications, the process analysis of the la- ser atmospheric propagation in engineering applications, the atmospheric turbulence effects on laser prop- agation and the ways of simulating atmospheric turbulence dynamic effects on laser propagation are dis- cussed. The numerical simulation of the random phase screens formed by multiple layers of atmospheric turbulence as while as wavdront retrieval based on a spatial light modulators （SLMs） is also provided. The data serials from numerical simulation of random phase screens created by multiple layers are pro- cessed by a computer,and then are sent to the SLMs on the light path so as to modulate the laser light phase,form the distributions of laser light random phase and the undulations of laser beam intensity in far field. The simulation system can generate different atmospheric turbulence and prove the turbulence effects on laser far field propagation. The application results show that the proposed method can provide the specialties of real-time,dynamic control, expansibility and can be used in hardware-in-loop simulation system,which also can be applied to the applications, such as simulation of laser signalsr atmosphere propagations.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2016年第7期709-715,共7页
Journal of Optoelectronics·Laser
基金
国家自然科学基金(11504420)
总装备部青年科技基金(201503305)资助项目
关键词
激光大气传输
湍流效应
动态模拟
半实物
空间光调制器(SLM)
相位重构
laser atmospheric propagation- turbulence effects- dynamic simulations- hardware-in-loop-spatial light modulators （SLMs） - linear phase retrieval
