NDLI: Simulation of anisoplanatism of adaptive optical system in inhomogeneous turbulent atmosphere

Content Provider	Springer Nature Link
Author	Moradi, Mohammad
Copyright Year	2008
Abstract	The goal of this study was to analyse anisoplanatism of adaptive optics under an inhomogeneous turbulent atmosphere over a pupil of finite size. By means of a numerical model with layers of turbulence software was proposed by which point spread function (PSF), optical transfer function (OTF) as well as system isoplanatic angle can be calculated. Atmospheric turbulence was simulated with the aid of a set of moving random phase screens with arbitrary statistics. Both reference and target are assumed to be the point light sources. To simulate atmospheric turbulence we applied the concept of a number of moving random phase screens with Kolmogorov spectrum. In my investigation I used the model of the Shack-Hartmann wave front sensor and the ideal model of a wave front adaptive mirror that is assumed to reproduce a given number of Zernike polynomials without time delays. The designed software allows calculation of instantaneous and average values of phase correction errors at different angles between a reference beacon and target source. Simulations can be made with a broad range of parameters of an adaptive system and atmospheric turbulence. The system of the model allows changing of the control algorithm of phase correction. Both common phase conjugation and weighted phase conjugation algorithm have been tested. This program is capable of calculating the effects of beam diffraction during propagation in the atmosphere.
Starting Page	125
Ending Page	129
Page Count	5
File Format	PDF
ISSN	13406000
Journal	Optical Review
Volume Number	15
Issue Number	2
e-ISSN	13499432
Language	English
Publisher	Optical Society of Japan
Publisher Date	2008-04-29
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	adaptive optics anisoplanatism turbulent atmosphere Shack-Hartmann phase screens Electromagnetism, Optics and Lasers
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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