Vortex beam generation by means of control of the piston shift of a fiber array using a phase forming DOE in active feedback loop

E. V. Adamov; V. P. Aksenov; V. V. Dudorov; V. V. Kolosov; M. E. Levitskii

doi:10.1117/12.2613693

2 December 2021 Vortex beam generation by means of control of the piston shift of a fiber array using a phase forming DOE in active feedback loop

E. V. Adamov, V. P. Aksenov, V. V. Dudorov, V. V. Kolosov, M. E. Levitskii

Author Affiliations +

Proceedings Volume 12086, XV International Conference on Pulsed Lasers and Laser Applications; 120860U (2021) https://doi.org/10.1117/12.2613693
Event: XV International Conference on Pulsed Lasers and Laser Applications, 2021, Tomsk, Russian Federation

Abstract

The results of an experiment on formation of a scalar vortex beam in the system of coherent combining of fiber laser beams are reported. Stabilization of phase relations between optical beams is achieved by placing a helicoid phase forming diffraction optical element (DOE) made as a phase plate with helical phase profile in the active feedback loop. Time-stable vortex beams with the topological charge p = ±1 are obtained. The vortex character of the obtained beams is confirmed by the results of interferometric measurements.

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E. V. Adamov, V. P. Aksenov, V. V. Dudorov, V. V. Kolosov, and M. E. Levitskii "Vortex beam generation by means of control of the piston shift of a fiber array using a phase forming DOE in active feedback loop", Proc. SPIE 12086, XV International Conference on Pulsed Lasers and Laser Applications, 120860U (2 December 2021); https://doi.org/10.1117/12.2613693

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