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.
© 2008 Optical Society of America
Original Manuscript: May 20, 2008
Revised Manuscript: June 22, 2008
Manuscript Accepted: June 22, 2008
Published: July 29, 2008
Miguel A. Porras and Alberto Parola, "Nonlinear unbalanced Bessel beams in the collapse of Gaussian beams arrested by nonlinear losses," Opt. Lett. 33, 1738-1740 (2008)