Results in Physics (Jan 2016)

On-axis intensity of hollow beams in nonlinear media with a high nonlocality

  • Zhen-Feng Yang,
  • Xing-Liang Li,
  • Jian-Xing Li,
  • Shu-Min Zhang,
  • Zhen-Jun Yang

Journal volume & issue
Vol. 6
pp. 256 – 257

Abstract

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In this paper, we focus on the on-axis intensity evolutions of hollow beams in nonlinear media with a high nonlocality. It is found that, the evolutions of on-axis intensity with different beam powers are always periodic during propagation, whereas, depending on different beam powers, the evolution curves of on-axis intensity in each period may exhibit themselves as three different types, namely, a concave, a platform, or a convex shape. The critical power, the extreme values of on-axis intensity and their corresponding positions are all given analytically. Keywords: Nonlocal nonlinearity, Beam propagation, Hollow beams, On-axis intensity