Nonlinear unbalanced Bessel beams in the collapse of Gaussian beams arrested by nonlinear losses

TL;DR

This paper investigates how nonlinear losses can arrest Gaussian beam collapse in Kerr media, leading to the formation of stable, finite-energy unbalanced Bessel beams that maintain their shape over long distances despite decreasing power.

Contribution

It introduces the concept of nonlinear unbalanced Bessel beams formed during collapse arrest, highlighting their stability and propagation characteristics in Kerr media with nonlinear losses.

Findings

Formation of quasi-stationary unbalanced Bessel beams during collapse arrest

Propagation without significant distortion over tens of diffraction lengths

Beam power diminishes while peak intensity remains stable

Abstract

Collapse of a Gaussian beam in self-focusing Kerr media arrested by nonlinear losses may lead to the spontaneous formation of a quasi-stationary nonlinear unbalanced Bessel beam with finite energy, which can propagate without significant distortion over tens of diffraction lengths, and without peak intensity attenuation while the beam power is drastically diminishing.