Internal motions in femtosecond soliton molecules provide insight into universal collective dynamics in various nonlinear systems.Here we introduce an orbital-angular-momentum(OAM)-resolved method that maps the relati...Internal motions in femtosecond soliton molecules provide insight into universal collective dynamics in various nonlinear systems.Here we introduce an orbital-angular-momentum(OAM)-resolved method that maps the relative phase motion within a femtosecond soliton molecule into the rotational movement of the interferometric beam profile of two optical vortices.By this means,long-term relative phase evolutions of doublet and triplet soliton molecules generated in an all-polarization-maintaining mode-locked Er-fiber laser are revealed.This simple and practical OAM-resolved method represents a promising way to directly visualize the complex phase dynamics in a diversity of multisoliton structures.展开更多
基金National Natural Science Foundation of China(61975144,61827821,11527808)The European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska Curie grant(713694)The Deutsche Forschungsgemeinschaft(DFG)under Germany's Excellence Strategy within the Cluister of ExcellencePhoenixD(EXC2122.ID:390833453).
文摘Internal motions in femtosecond soliton molecules provide insight into universal collective dynamics in various nonlinear systems.Here we introduce an orbital-angular-momentum(OAM)-resolved method that maps the relative phase motion within a femtosecond soliton molecule into the rotational movement of the interferometric beam profile of two optical vortices.By this means,long-term relative phase evolutions of doublet and triplet soliton molecules generated in an all-polarization-maintaining mode-locked Er-fiber laser are revealed.This simple and practical OAM-resolved method represents a promising way to directly visualize the complex phase dynamics in a diversity of multisoliton structures.
