摘要
实现了自适应光学系统校正激光大气湍流位相畸变的数值模拟,研究了自适应光学系统的校正效率随湍流强度的变化规律以及横向风速对自适应光学校正效果的影响。结果表明,自适应光学系统能够校正湍流造成的激光波前位相畸变,提高靶面激光峰值功率密度,降低靶面激光强度起伏。湍流强度对于自适应光学系统的校正效率有比较大的影响,湍流强度较弱和较强,自适应光学系统的校正效率均不高;只有中等强度的湍流,校正效率最高。此外,横向风速对于自适应光学系统的校正效果也有比较大的影响,随着横向风速的增大,自适应光学系统的校正效果不断变差。
The numerical simulation of atmospheric turbulence wavefront aberration corrected by the Adaptive optics （AO） system is carried out. The relations between the AO system correct efficiency and the turbulence strength and the transverse wind are studied. The results show that the AO system can correct the wavefront aberration, increase the peak power density of the laser on target, and decrease the scintillation index of the laser. And the turbulence strength has a serious effect on the AO system correct efficiency. Under the weak and the strong turbulence condition, the correct efficiency is not very high; under the moderate turbulence, it will be high.Further more, the transverse wind can also affect the AO system, the bigger the transverse wind velocity is, the worse the AO system works.
出处
《激光杂志》
CAS
CSCD
北大核心
2009年第4期23-24,共2页
Laser Journal
关键词
大气湍流
自适应光学校正
数值模拟
atmospheric turbulence
AO correct
numerical simulation
