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.
Source PublicationPROPAGATION AND IMAGING THROUGH THE ATMOSPHERE III
1999
Conference NameConference on Propagation and Imaging through the Atmosphere III
Conference DateJUL 22-23, 1999
Conference PlaceDENVER, CO
AbstractA 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 IDWOS:000083637500008
ISBN0-8194-3249-0
URL查看原文
Indexed ByCPCI-S
Language英语
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Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58967
Collection力学所知识产出(1956-2008)
Corresponding Author严海星 (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
Recommended Citation
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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