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Full-Text Articles in Physics
Self-Organization Of Spatial Solitons, Martin Centurion, Ye Pu, Demetri Psaltis
Self-Organization Of Spatial Solitons, Martin Centurion, Ye Pu, Demetri Psaltis
Martin Centurion Publications
We present experimental results on the transverse modulation instability of an elliptical beam propagating in a bulk nonlinear Kerr medium, and the formation and self-organization of spatial solitons. We have observed the emergence of order, self organization and a transition to an unstable state. Order emerges through the formation of spatial solitons in a periodic array. If the initial period of the array is unstable the solitons will tend to self-organize into a larger (more stable) period. Finally the system transitions to a disordered state where most of the solitons disappear and the beam profile becomes unstable to small changes …
Dynamics Of Filament Formation In A Kerr Medium (With Erratum), Martin Centurion, Ye Pu, Mankei Tsang, Demetri Psaltis
Dynamics Of Filament Formation In A Kerr Medium (With Erratum), Martin Centurion, Ye Pu, Mankei Tsang, Demetri Psaltis
Martin Centurion Publications
We have studied the large-scale beam breakup and filamentation of femtosecond pulses in a Kerr medium. We have experimentally monitored the formation of stable light filaments, conical emission, and interactions between filaments. Three major stages lead to the formation of stable light filaments: First the beam breaks up into a pattern of connected lines (constellation), then filaments form on the constellations, and finally the filaments release a fraction of their energy through conical emission. We observed a phase transition to a faster filamentation rate at the onset of conical emission. We attribute this to the interaction of conical emissions with …