TY - JOUR T1 - Simulation of propagation of high power Nd:YAG pulsed laser in turbulentatmosphere by means of Split-Step method and investigation of its phase by Zernike polynomials TT - شبیه سازی انتشار لیزر Nd:YAG گالسی گرتوان منتشرشده در جو متلاطم با روش Split-Step و بررسی فاز آن با استفاده از چندجمله ای های زرنیک JF - opsi JO - opsi VL - 23 IS - 0 UR - http://opsi.ir/article-1-1188-en.html Y1 - 2017 SP - 497 EP - 500 KW - Split-Step algorithm KW - High power pulses KW - Atmospheric turbulence KW - Nd:YAG laser. N2 - Random variation of atmosphere refractive index causes changing the optical path. Therefore, it affects the intensity and phase of wavefront passing through the atmosphere. There are different algorithms for simulating the propagation of laser beams through turbulent atmosphere. In this article, propagation of high power pulses of laser with gaussian profile is investigated using numerical simulation and Split-Step method. Phase screens are simulated using Fourier transform and variations of intensity and phase of laser pulses are investigated. Results of simulations show that at wavefront phase retrieval process, increasing the number of terms of Zernike polynomials leads to decreasing the residual phase error. M3 ER -