Geometric optics analysis on self-reconstruction of the nondiffracting beam generated from an axicon

Abstract

Self-reconstruction of the nondiffracting beam generated from an axicon was analyzed for the first time based on the geometrical optics and the formation principle of self-reconstruction was well explained. In the Fresnel approximation, beam transmission characteristics were described well using the theory of Fresnel diffraction. But the approximation condition will not satisfy in the quite little distance after beam passing through the obstacle and the diffraction theory is no longer suitable. In such case, geometrical optics can be used to describe the beam transmission characteristics. In this paper, self-reconstruction of the nondiffracting beam generated from an axicon was analyzed in detail based on the geometrical optics. Simulation and experimental observation of the self-reconstruction characteristic are presented. The experimental results agree with the theoretical analysis.