Numerical simulation of laser propagation in atmosphere and an adaptive optics system in static state

IMECH-IR > 力学所知识产出(1956-2008)

	Numerical simulation of laser propagation in atmosphere and an adaptive optics system in static state
	Yan HX(严海星); Li SS(李树山); Zhang DL(张德良); Chen S(陈涉); 严海星 (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
会议录名称	PROPAGATION AND IMAGING THROUGH THE ATMOSPHERE III
	1999
会议名称	Conference on Propagation and Imaging through the Atmosphere III
会议日期	JUL 22-23, 1999
会议地点	DENVER, CO
摘要	A comprehensive model of laser propagation in atmosphere and all portions of an adaptive optics (AO) system for phase compensation is presented and the corresponding computer program is compiled. By using the direct wavefront gradient control method to reconstruct the wavefront phase and utilizing the long-exposure Strehl ratio as the evaluation parameter, the numerical simulation of an AO system in static state with atmospheric propagation of laser beam is carried out. It is found that on certain conditions the phase-screen which describes turbulence in the atmosphere might not be isotropic. The numerical experiments show that the computational results in imaging of lenses by means of the fast Fourier transform (FFT) method agree excellently with those by means of integration method. However, the computer time of FFT method is one order of magnitude less than that of integration method. We present "phase tailoring" of the calculated phase 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 that for a constant delay time of the 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. It indicates that a better compensation capability of an AO system does not mean a better correction effectiveness.
WOS记录号	WOS:000083637500008
ISBN号	0-8194-3249-0
URL	查看原文
收录类别	CPCI-S
语种	英语
引用统计
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/58967
专题	力学所知识产出(1956-2008)
通讯作者	严海星 (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Yan HX,Li SS,Zhang DL,et al. Numerical simulation of laser propagation in atmosphere and an adaptive optics system in static state[C]PROPAGATION AND IMAGING THROUGH THE ATMOSPHERE III,1999.

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