Optical vortex is a promising candidate for capacity scaling in next-generation optical communications.The generation of multi-vortex beams is of great importance for vortex-based optical communications.Traditional ap...Optical vortex is a promising candidate for capacity scaling in next-generation optical communications.The generation of multi-vortex beams is of great importance for vortex-based optical communications.Traditional approaches for generating multivortex beams are passive,unscalable and cumbersome.Here,we propose and demonstrate a multi-vortex laser,an active approach for creating multi-vortex beams directly at the source.By printing a specially-designed concentric-rings pattern on the cavity mirror,multi-vortex beams are generated directly from the laser.Spatially,the generated multi-vortex beams are decomposable and coaxial.Temporally,the multi-vortex beams can be simultaneously self-mode-locked,and each vortex component carries pulses with GHz-level repetition rate.Utilizing these distinct spatial-temporal characteristics,we demonstrate that the multi-vortex laser can be spatially and temporally encoded for data transmission,showing the potential of the developed multi-vortex laser in optical communications.The demonstrations may open up new perspectives for diverse applications enabled by the multi-vortex laser.展开更多
基金supported by the National Natural Science Foundation of China Grant No.61675130,11774116,11721091,61490713,91850203,61761130082,11574001,the National Key R&D Program of China(2018YFB2200204,2018YFB1801803)the Royal Society-Newton Advanced Fellowship,the Natural Science Foundation of Hubei Province of China(2018CFA048)+2 种基金the Key R&D Program of Guangdong Province(2018B030325002)the Program for HUST Academic Frontier Youth Team(2016QYTD05)the Fundamental Research Funds for the Central Universities(2019kfyRCPY037).
文摘Optical vortex is a promising candidate for capacity scaling in next-generation optical communications.The generation of multi-vortex beams is of great importance for vortex-based optical communications.Traditional approaches for generating multivortex beams are passive,unscalable and cumbersome.Here,we propose and demonstrate a multi-vortex laser,an active approach for creating multi-vortex beams directly at the source.By printing a specially-designed concentric-rings pattern on the cavity mirror,multi-vortex beams are generated directly from the laser.Spatially,the generated multi-vortex beams are decomposable and coaxial.Temporally,the multi-vortex beams can be simultaneously self-mode-locked,and each vortex component carries pulses with GHz-level repetition rate.Utilizing these distinct spatial-temporal characteristics,we demonstrate that the multi-vortex laser can be spatially and temporally encoded for data transmission,showing the potential of the developed multi-vortex laser in optical communications.The demonstrations may open up new perspectives for diverse applications enabled by the multi-vortex laser.
