Vortex fiber lasers that directly deliver low-cost and high-performance vortex beams could provide straightfor-ward and compact solutions for structured laser sources and have found applications in various fields.Suff...Vortex fiber lasers that directly deliver low-cost and high-performance vortex beams could provide straightfor-ward and compact solutions for structured laser sources and have found applications in various fields.Suffering from either simple and fixed functionality,or large insertion loss together with bulky configurations of phase modulation components such as q-plates and spatial light modulators,the output flexibility and tunability of conventional vortex fiber lasers are limited.Recently,polarization-multiplexing metasurfaces(PMMs)have shown powerful potential for manipulating light in different dimensions.Here we propose and experimentally demonstrate topological charge switchable vortex fiber lasers assisted by on-demand customized PMMs.Importantly,by adjusting the setting of the wave plates within the cavity,the topological charge of the output vortex beams can be effectively switched and even decoupled at will.The design principle and experimental verification offer new perspectives for vortex fiber laser configurations,offering promising applications from large-capacity optical communication and particle manipulation to super-resolution microscopy and quantum information processing.展开更多
基金National Natural Science Foundation of China(61905018)Fundamental Research Funds for the Central Universities(ZDYY202102)State Key Laboratory of InformationPhotonics and Optical Communications(IPOC2021ZR02).
文摘Vortex fiber lasers that directly deliver low-cost and high-performance vortex beams could provide straightfor-ward and compact solutions for structured laser sources and have found applications in various fields.Suffering from either simple and fixed functionality,or large insertion loss together with bulky configurations of phase modulation components such as q-plates and spatial light modulators,the output flexibility and tunability of conventional vortex fiber lasers are limited.Recently,polarization-multiplexing metasurfaces(PMMs)have shown powerful potential for manipulating light in different dimensions.Here we propose and experimentally demonstrate topological charge switchable vortex fiber lasers assisted by on-demand customized PMMs.Importantly,by adjusting the setting of the wave plates within the cavity,the topological charge of the output vortex beams can be effectively switched and even decoupled at will.The design principle and experimental verification offer new perspectives for vortex fiber laser configurations,offering promising applications from large-capacity optical communication and particle manipulation to super-resolution microscopy and quantum information processing.
