Документ взят из кэша поисковой машины. Адрес оригинального документа : http://ofvp.phys.msu.ru/en/science_education/diploma/annot/2007/Ilyina_Cherezova_en.pdf Дата изменения: Tue Dec 19 20:16:45 2006 Дата индексирования: Mon Oct 1 21:18:08 2012 Кодировка:

Diploma thesis abstract "Laser beam shaping by means of the bimorph mirror based on Gerchberg-Saxton algorithm" Ilyina Inna Vyacheslavovna scientific adviser: Ph.D. Cherezova T.Yu. In this work we present results of the given two-dimensional intensity distribution formation in the far-field region by means of the Gerchberg-Saxton iterative algorithm. Semi-passive bimorph flexible mirror has been used to reproduce phase profile, required for laser beam intensity profile transformation. We demonstrate supergaussian irradiance formation of the 3rd and 6th order from a single-mode Gaussian irradiance profile. The formation accuracy of 0.17% and 4.06% respectively has been achieved. The novel method, based on the Gerchberg-Saxton iterative procedure, has been proposed for the problem of multimode laser beam transformation. We were able to produce 3-order super-gaussian intensity distribution from the combination of TEM00 and TEM01 modes (with formation accuracy of 5.30%) and from combination of TEM00+TEM01+TEM10+TEM02 modes (with accuracy of 1.60%).