摘要
当强激光束穿过大气时,大气对光束的各种线性和非线性衰减因素使光束质量和能量密度受到很大的影响。大气对激光束的这些衰减因素都有很强的波长相关性,不同波长的大气光学性质差别非常之大。为了给激光通讯或强激光传输选择最佳传输波长或波段。本文利用计算物理模型模拟计算了分子吸收、分子散射、气溶胶(包括云和雨)消光、衍射、抖动、湍流和热晕对高能激光大气传输的影响。分析其波长相关性后,给出了最佳波段的选择,并具体对几种激光器进行了简要的分析。
The quality and intensity of high power laser beamswill be affected vioelntly by many kinds of atmospheric Linear and nonlinear influences which are strongly wavelength dependent when laser beams propagate through the atmosphere. In order to find out the most suitable wavelength or spectral range for high power laser beam propagation, the effects of molecular absorption, molecular scattering, aerosol (include cirrus and rain) attenuation, diffraction, jitter, turbulence and thermal blooming are modeled by means of calculating physics method in this article. The following wave bands are thought to be beneficial for Ground-Based Laser (GBL) to trans
port energy systems : 0.77--0.80μm.
0. 85--0. 89μm ; 0. 99--1.11μm , 1. 18--1. 29μm . and 1. 51--1. 74μm . Through analysing the transmittance of some lasers spectra , it was found that DF chemical laser (2471.58--2691.79cm-1 ), OI chemical laser ( 1.315μm ), and free electron laser be used as GBL, and the excimer and HF chemical laser can only be chosenas the candidates for space based lasers.
出处
《强激光与粒子束》
EI
CAS
CSCD
1989年第3期267-274,共8页
High Power Laser and Particle Beams
关键词
激光
传输
斜程
大气
波长
激光器
Atmospheric Propagation , Turbulence , Aerosol Attenuation.
