Numerical simulation of an adaptive optics system with laser propagation in the atmosphere

CORC > 力学研究所 > 中国科学院力学研究所 > 力学所知识产出(1956-2008)

	Numerical simulation of an adaptive optics system with laser propagation in the atmosphere
	Yan HX(严海星); Li SS(李树山); Zhang DL(张德良); Chen S(陈涉)
刊名	Applied Optics
	2000
通讯作者邮箱	hxyan@imech.ac.cn
卷号	39 期号:18 页码:3023-3031
ISSN号	0003-6935
通讯作者	Yan, HX (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
中文摘要	A comprehensive model of laser propagation in the atmosphere with a complete adaptive optics (AO) system for phase compensation is presented, and a corresponding computer program is compiled. A direct wave-front gradient control method is used to reconstruct the wave-front phase. With the long-exposure Strehl ratio as the evaluation parameter, a numerical simulation of an AO system in a stationary state with the atmospheric propagation of a laser beam was conducted. It was found that for certain conditions the phase screen that describes turbulence in the atmosphere might not be isotropic. Numerical experiments show that the computational results in imaging of lenses by means of the fast Fourier transform (FFT) method agree well with those computed by means of an integration method. However, the computer time required for the FFT method is 1 order of magnitude less than that of the integration method. Phase tailoring of the calculated phase is presented as a means to solve the problem that variance of the calculated residual phase does not correspond to the correction effectiveness of an AO system. It is found for the first time to our knowledge that for a constant delay time of an AO system, when the lateral wind speed exceeds a threshold, the compensation effectiveness of an AO system is better than that of complete phase conjugation. This finding indicates that the better compensation capability of an AO system does not mean better correction effectiveness. (C) 2000 Optical Society of America.
学科主题	力学
类目[WOS]	Optics
研究领域[WOS]	Optics
关键词[WOS]	TURBULENCE
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000087668600003
公开日期	2007-06-15
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16041]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Yan HX,Li SS,Zhang DL,et al. Numerical simulation of an adaptive optics system with laser propagation in the atmosphere[J]. Applied Optics,2000,39(18):3023-3031.
APA	严海星,李树山,张德良,&陈涉.(2000).Numerical simulation of an adaptive optics system with laser propagation in the atmosphere.Applied Optics,39(18),3023-3031.
MLA	严海星,et al."Numerical simulation of an adaptive optics system with laser propagation in the atmosphere".Applied Optics 39.18(2000):3023-3031.