摘要
讨论了激光大气传输时的湍流与热晕综合效应问题。提出了根据湍流效应对热晕经验公式进行修正的处理方法,其物理基础是在湍流效应较明显的情况下,由相干距离决定的湍流Fresnel衍射参数远小于由发射口径决定的Fresnel衍射参数时,小尺度热晕的影响超过整束热晕占主导地位。将修正的经验公式与基于数值计算的定标公式相比较,结果令人满意。
The combined effects of turbulence and thermal blooming of laser propagation in atmosphere is discussed.A technique was proposed that where in the empirical formula of thermal blooming was employed with a modification by turbulence effect. The physical foundation is that the turbulence Fresnel parameter is smaller than the whole-beam Fresnel parameter,the small-scale thermal blooming is dominant. The modified empirical formula is compared with a scaling law based on numerical simulation, and the results are satisfactory.
出处
《红外与激光工程》
EI
CSCD
北大核心
2006年第2期130-134,共5页
Infrared and Laser Engineering
关键词
大气湍流
热晕
激光大气传输
Turbulence
Thermal blooming
Laser propagation in atmosphere
