Two Methods of Generating the Self-Reconstruction of the Non-Diffracting Beams

The reconstruction property of the non-diffracting beam generated by using the axicon-lens system and by passing through an opaque obstacle was studied.The propagation property and the optical intensity distribution of the reconstructed Bessel beam were simulated by the computer.It is shown that the non-diffracting beam can be reconstructed by the forementioned two methods,however,the reconstructed beam has a weaker central intensity,a larger spot size and fewer bright rings than the original beam.By lens focusing method,high quality non-diffracting beams with a longer non-diffracting distance has been obtained with a rectifying lens.However,no additional equipment is needed by using the obstruction self-reconstruction method to reconstruct the non-diffracting beam and the reconstructed beam can be used to trap the particles.Moreover,it could be reconstructed again when it passes another obstacles.