I. V. Il'ina, T. Yu. Cherezova, A. V. Kudryashov, “Gerchberg–Saxton algorithm: experimental realisation and modification for the problem of formation of multimode laser beams”, Kvantovaya Elektronika, 2009, Volume 39, Number 6,Pages <nobr>521

This article is cited in 17 papers

Control of laser radiation parameters

Gerchberg–Saxton algorithm: experimental realisation and modification for the problem of formation of multimode laser beams

I. V. Il'ina^a, T. Yu. Cherezova^a, A. V. Kudryashov^b

^a Lomonosov Moscow State University, Faculty of Physics
^b Shatura branch of the Moscow State Open University

Abstract: An original method is proposed to calculate the formation of specified far-field intensity distributions by a bimorph mirror in the case of initial transverse-multimode beams. The method is based on the Gerchberg–Saxton algorithm with replacement of the phase function in the plane of the control element by a function that takes into account both the intensity and phase distributions of each mode. The numerical results on the formation of a beam with the third-order super-Gaussian intensity distribution from beams composed of two or four lowest transverse modes are discussed. The experimental results on using the conventional Gerchberg–Saxton algorithm to form a desired intensity distribution from single-mode laser beams using a liquid-crystal modulator are presented.

PACS: 42.60.Jf, 42.79.Kr, 42.70.Dr

Received: 14.03.2008
Revised: 10.11.2008