All-fiber superfluorescent light amplifier emitting over 50 W high-power vortex beams

In recent years, the temporal attributes of superfluorescent light sources have garnered significant attention. This study focuses on the spatial characteristics of fiber superfluorescent light sources for the generation and amplification of high-power vortex beams. We successfully generate vortex beams with topological charge of ±1 and achieve an output power exceeding 50 W, while maintaining phase singularity in the whole process. To the best of our knowledge, this represents the highest power level achieved for vortex beams generated entirely within an all-fiber system. The amplified beams exhibit a purity of approximately 90%, providing a compact solution for advanced photonic applications in optical communications, high-resolution imaging, and particle manipulation.