title: Nonlinear unbalanced Bessel beams in the collapse of Gaussian beams arrested by nonlinear losses.
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.
authors.affiliation: Departamento de Física Aplicada, Escuela Tecnica Superior de Ingenieros de Minas, Universidad Politécnica de Madrid, Rios Rosas 21, 28003 Madrid, Spain. miguelangel.porras@upm.es
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Porras
authors.forename: Alberto
authors.initials: A
authors.lastname: Parola