面向遥感应用的飞秒激光在轨传输规律仿真研究  

Simulation of Femtosecond Laser Propagation in Orbit for Remote Sensing Applications

作　　者：刘勋[1] 李维[1] 冯志芳 刘渊 任维贺 孙德伟[1] LIU Xun;LI Wei;FENG Zhifang;LIU Yuan;REN Weihe;SUN Dewei(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China;School of Applied Science,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]北京空间机电研究所,北京100094 [2]太原科技大学应用科学学院,太原030024

出　　处：《航天返回与遥感》2022年第4期78-88,共11页Spacecraft Recovery & Remote Sensing

基　　金：国家重点研发计划(2018YFB0504400)。

摘　　要：飞秒激光大气传输具有丰富的非线性效应,产生的等离子体光丝由于传输距离长、发散角小、峰值功率高等特点,有望推动新型天基激光雷达发展。文章面向遥感应用,瞄准飞秒激光脉冲400km超长距离传输可行性开展研究,完成飞秒激光脉冲在轨传输规律仿真研究。文章首先介绍飞秒激光在轨传输仿真模型的构建机理,验证其有效性,在此基础上,仿真分析了飞秒激光脉冲宽度、脉冲半径、脉冲能量对飞秒激光在轨传输规律的影响,解决了飞秒激光脉冲大气超远程传输仿真的关键问题,说明了其在天基产生、传输与应用的可行性,为后续天基系统论证提供必要基础。Femtosecond laser propagation in the atmosphere has a wealth of nonlinear effects.The plasma filaments produced are expected to promote the development of new space-based lidars due to their long transmission distance,small divergence angle and high peak power.Facing the remote sensing application,this paper aims at the feasibility study of femtosecond laser pulse with 400km ultra-long distance transmission,and completes the simulation study of the transmission law for femtosecond laser pulse in orbit.Firstly,the construction mechanism of transmission simulation models for femtosecond laser in orbit is introduced to verify its effectiveness.On this basis,the effects of femtosecond laser pulse width,pulse radius and pulse energy on the transmission law for femtosecond laser in orbit are simulated and analyzed.The key problem in ultra-long distance transmission simulation for femtosecond laser pulse in the atmosphere is solved,and the feasibility of its generation,transmission and application in the space-based system is explained,which provides a necessary basis for the subsequent demonstration for the space-based system.

关 键 词：飞秒激光 在轨 传输 仿真 遥感应用 

分 类 号：O437[机械工程—光学工程]