A V-folded digital laser using a spatial light modulator(SLM)for intra-cavity loss shaping is exploited to generate Hermite-Gaussian modes with on-demand mode order.With aπ/2 astigmatic mode converter,vortex beams ca...A V-folded digital laser using a spatial light modulator(SLM)for intra-cavity loss shaping is exploited to generate Hermite-Gaussian modes with on-demand mode order.With aπ/2 astigmatic mode converter,vortex beams carrying on-demand orbital angular momentum(OAM)with a tunable range from-11h to 12 h are obtained.The mode order of the HG mode,hence the OAM of the vortex beam,is digitally switched by changing the phase pattern imposed on the SLM without requiring any mechanic alignment of the cavity.This work has great potential applications in various OAM-tunable vortex beams.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 61605049 and 61575070the Natural Science Foundation of Fujian Province of China under Grant No 2018J01003+1 种基金the Fundamental Research Funds for the Central Universities under Grant No ZQN-707the Subsidized Project for Postgraduates’ Innovative Fund in Scientific Research of Huaqiao University
文摘A V-folded digital laser using a spatial light modulator(SLM)for intra-cavity loss shaping is exploited to generate Hermite-Gaussian modes with on-demand mode order.With aπ/2 astigmatic mode converter,vortex beams carrying on-demand orbital angular momentum(OAM)with a tunable range from-11h to 12 h are obtained.The mode order of the HG mode,hence the OAM of the vortex beam,is digitally switched by changing the phase pattern imposed on the SLM without requiring any mechanic alignment of the cavity.This work has great potential applications in various OAM-tunable vortex beams.
