Anomalous transverse transformation of astigmatic four-petal Gaussian beams in isotropic nonlocal nonlinear media

Publication date: Available online 15 June 2018Source: Results in PhysicsAuthor(s): Zhen-Jun Yang, Hong-Xia Bu, Yong-Bo Wang, Xing-Liang Li, Shu-Min ZhangAbstractIn this paper, the evolution dynamics of astigmatic four-petal Gaussian beams in isotropic nonlocal nonlinear media is investigated. A series of analytical expressions are derived to describe the beam evolution, the beam width, and the critical power. The anomalous transverse transformation is presented, i.e., an astigmatic four-petal Gaussian beam is compressed in one transverse direction and it is broadened in the other transverse direction. These evolution characteristics of astigmatic four-petal Gaussian beams are illustrated through some numerical simulations.

Source: Results in Physics - July 10, 2018 Category: Physics Source Type: research