We develop a spatiotemporal mode decomposition technique to study the spatial and temporal mode power distribution of ultrashort pulses in long spans of graded-index multimode fiber,for different input laser condition...We develop a spatiotemporal mode decomposition technique to study the spatial and temporal mode power distribution of ultrashort pulses in long spans of graded-index multimode fiber,for different input laser conditions.We find that the beam mode power content in the dispersive pulse propagation regime can be described by the Bose-Einstein law,as a result of the process of power diffusion from linear and nonlinear mode coupling among nondegenerate mode groups.In the soliton regime,the output mode power distribution approaches the Rayleigh-Jeans law.展开更多
This review describes recent theoretical and experimental advances in the area of multimode solitons,focusing primarily on multimode fibers.We begin by introducing the basic concepts such as the spatial modes supporte...This review describes recent theoretical and experimental advances in the area of multimode solitons,focusing primarily on multimode fibers.We begin by introducing the basic concepts such as the spatial modes supported by a multimode fiber and the coupled mode equations for describing the different group delays and nonlinear properties of these modes.We review several analytic approaches used to understand the formation of multimode solitons,including those based on the 3D+1 spatiotemporal nonlinear Schr?dinger equation(NLSE)and its approximate 1D+1 representation that has been found to be highly efficient for studying the self-imaging phenomena in graded-index multimode fibers.An innovative Gaussian quadrature approach is used for faster numerical simulations of the 3D+1 NLSE.The impact of linear mode coupling is discussed in a separate section using a generalized Jones formalism because of its relevance to space-division multiplexed optical communication systems.The last section is devoted to the relevant experimental studies involving multimode solitons.展开更多
基金HORIZON EUROPE European Research Council(101081871,740355)H2020 Marie Sk?odowskaCurie Actions(101023717,101064614)+2 种基金Ministero dell'Istruzionedell'Universitàe della Ricerca(R18SPB8227)Sapienza University of Rome(SP12218480C7D1E9)。
文摘We develop a spatiotemporal mode decomposition technique to study the spatial and temporal mode power distribution of ultrashort pulses in long spans of graded-index multimode fiber,for different input laser conditions.We find that the beam mode power content in the dispersive pulse propagation regime can be described by the Bose-Einstein law,as a result of the process of power diffusion from linear and nonlinear mode coupling among nondegenerate mode groups.In the soliton regime,the output mode power distribution approaches the Rayleigh-Jeans law.
基金H2020 European Research Council(740355)H2020 Marie Sk?odowska-Curie Actions(101023717)+3 种基金HORIZON EUROPE Marie Sklodowska-Curie Actions(101064614)Sapienza Universitàdi Roma(EFFILOCKER,NOSTERDIS)Ministero dell'Istruzione e del Merito(ECS00000041 VITALITY-CUP E13C22001060006,PE00000001-program“RESTART”)Olle Engkvists Stiftelse(214-0328)。
文摘This review describes recent theoretical and experimental advances in the area of multimode solitons,focusing primarily on multimode fibers.We begin by introducing the basic concepts such as the spatial modes supported by a multimode fiber and the coupled mode equations for describing the different group delays and nonlinear properties of these modes.We review several analytic approaches used to understand the formation of multimode solitons,including those based on the 3D+1 spatiotemporal nonlinear Schr?dinger equation(NLSE)and its approximate 1D+1 representation that has been found to be highly efficient for studying the self-imaging phenomena in graded-index multimode fibers.An innovative Gaussian quadrature approach is used for faster numerical simulations of the 3D+1 NLSE.The impact of linear mode coupling is discussed in a separate section using a generalized Jones formalism because of its relevance to space-division multiplexed optical communication systems.The last section is devoted to the relevant experimental studies involving multimode solitons.
