Abstract The study of Bose–Einstein condensation effects in photonic systems has revealed
a rich phenomenology related to spontaneous coherence generation in driven-dissipative …

Linear multimode optical systems have enabled clean experimental observations and the
applications of numerous phenomena that continually extend the boundaries of wave …

Multimode devices and components have attracted considerable attention in the last years,
and different research topics and themes have emerged very recently. The multimodality can …

Since its first demonstration in graded-index multimode fibers, spatial beam self-cleaning
has attracted a growing research interest. It allows for the propagation of beams with a bell …

Nonlinear multimode optical systems support a host of intriguing effects that are impossible
in single-mode settings. Although nonlinearity can provide a rich environment where the …

The overall goal of photonics research is to understand and control light in new and richer
ways to facilitate new and richer applications. Many major developments to this end have …

We report on the thermalization of light carrying orbital angular momentum in multimode
optical fibers, induced by nonlinear intermodal interactions. A generalized Rayleigh-Jeans …

Although the temperature of a thermodynamic system is usually believed to be a positive
quantity, under particular conditions, negative-temperature equilibrium states are also …

The input power-induced transformation of the transverse intensity profile at the output of
graded-index multimode optical fibers from speckles into a bell-shaped beam sitting on a …

We address the problem of thermalization in the presence of a time-dependent disorder in
the framework of the nonlinear Schrödinger (or Gross-Pitaevskii) equation with a random …