Intense vortical-field generation using coherent superposition of multiple vortex beams

Coherent beam combining technology applied to multiple vortex beams is a promising method to generate high-power vortex beams. We utilize the coherent combination of multiple Laguerre-Gaussian beams at the waist plane and propose theoretically a practical generation system for a high-power beam carrying orbital angular momentum by considering oblique incidence. The results demonstrate that the orbital angular momentum distribution of the combined field is similar to that of a single Laguerre-Gaussian beam within the Rayleigh length. Moreover, the combined field has relativistic intensity local spots that exhibit stable spatial propagation. The proposed system may potentially be applied to intense vortical fields, large scale nuclear fusion device, such as suppressing stimulated Raman scattering and filamentation when a laser beam propagates in plasma.

Automated summary

Coherent beam combining technology is a promising method for generating high-power vortex beams. Utilizing multiple Laguerre-Gaussian beams, we propose a practical system for generating a high-power beam with orbital angular momentum. The combined field exhibits similar orbital angular momentum distribution as a single Laguerre-Gaussian beam within the Rayleigh length, and shows stable spatial propagation with relativistic intensity local spots. This system may have applications in intense vortical fields and large-scale nuclear fusion devices, such as suppressing stimulated Raman scattering and filamentation in plasma.