A theoretical model is proposed to describe a novel vortex beam named anomalous vortex (AV) beam. Analytical propagation formula for the proposed beam passing through a paraxial ABCD optical system is derived, and the propagation properties of such beam in free space are studied numerically. It is interesting to find that an AV beam will eventually become an elegant Laguerre–Gaussian beam in the far field (or in the focal plane) in free space. Furthermore, we report experimental generation of an AV beam and measure its propagation properties. Our experimental results are consistent with the theoretical predictions.
© 2013 Optical Society of America
Diffraction and Gratings
Original Manuscript: September 16, 2013
Revised Manuscript: November 6, 2013
Manuscript Accepted: November 14, 2013
Published: December 11, 2013
Yuanjie Yang, Yuan Dong, Chengliang Zhao, and Yangjian Cai, "Generation and propagation of an anomalous vortex beam," Opt. Lett. 38, 5418-5421 (2013)