Vol. 29, issue 11, article # 6

Bogachev V.A., Garanin S.G., Starikov F.A., Shnyagin R.A. Numerical simulation of sensorless adaptive phase correction of regular, vertical, and incoherent multimode laser beams. // Optika Atmosfery i Okeana. 2016. V. 29. No. 11. P. 934–941 [in Russian].
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Abstract:

A number of aspects are considered at phase correction of regular and vortical (speckled) laser beams by flexible adaptive mirror, the surface control of which is performed with the help of stochastic parallel gradient (SPG) algorithm, without the use of the wavefront sensor. It is shown that optimal choice of the criterion functional (metric) and basis function set allows one to improve the phase correction accuracy and convergence speed of SPG algorithm. A possibility is demonstrated of partial phase correction of the incoherent multimode radiation that can be realized, for example, in а laser cavity with optically inhomogeneous gain medium.

Keywords:

adaptive mirror, phase correction of laser beam, optical aberrations, stochastic parallel gradient algorithm

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