Optical wave turbulence and the condensation of light

Umberto Bortolozzo, Jason Laurie, Sergey Nazarenko, Stefania Residori
2009 Journal of the Optical Society of America. B, Optical physics  
In an optical experiment, we report a wave turbulence regime that, starting with weakly nonlinear waves with randomized phases, shows an inverse cascade of photons towards the lowest wavenumbers. We show that the cascade is induced by a six-wave resonant interaction process and is characterized by increasing nonlinearity. At low wavenumbers the nonlinearity becomes strong and leads to modulational instability developing into solitons, whose number is decreasing further along the beam.
doi:10.1364/josab.26.002280 fatcat:odge4r27qrdavdhlfucgcty2vi