Laser beam shaping based on amplitude-phase control of a fiber laser array

PLUTO / PLUTO-2 Spatial Light Modulators
Beam Shaping / Beam Steering Materials Processing / Optical Fabrication
Published on:
Authors: Adamov, E. V.; Aksenov, V. P.; Atuchin, V. V.; Dudorov, V. V.; Kolosov, V. V. & Levitsky, M. E.
Abstract:

“A new technique is suggested for the generation of laser beams with an intensity profile specified. The technique is based on the coherent combining of radiation of a fiber laser array with adaptive control of the power and phase of Gaussian subbeams with plane wavefronts. The power and phase of the subbeams are determined for each intensity profile specified in the far field based on the inverse problem solution, for example, by the Gershberg–Saxton method. To form a required phase profile, the stochastic parallel gradient descent (SPGD) method is used along with the inversion of a required phase distribution with a phase corrector. The main advantages of the technique are the adaptive control of the intensity profile and a possibility of generating high-power laser beams. The results of numerical and field experiments are described.”

Open Access

Publication: OSA Continuum
Issue/Year: OSA Continuum, Volume 4; Number 1; Pages 182; 2021
DOI: 10.1364/osac.413956
Link: https://doi.org/10.1364/osac.413956

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