Propagation properties and M-2 factors of a vortex airy beam

Chew, Khian Hooi and Wu, Q.Y. and Chen, R.P. and Zhong, L.X. (2012) Propagation properties and M-2 factors of a vortex airy beam. Optics & Laser Technology, 44 (7). pp. 2015-2019. ISSN 0030-3992

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Official URL: https://doi.org/10.1016/j.optlastec.2012.03.038

Abstract

We investigate the propagation properties and M-2 factor of a vortex Airy beam. The expression of M-2 factor as a function of the modulation parameters a(x) and a(y) is analytically obtained. The results indicate that the M-2 factor can achieve minimum M-2=2.33 when a(x)=a(y)=1.026 for the m= 1st order vortex Airy beam. For m=2, the M-2 factor can achieve minimum M-2=7.53 when a(x)=1.601 and a(y)=0.529 (or a(y)=1.601 and a(x)=0.529). These results indicate that the far field divergence of the beam width in the sense of root-mean-square beam is related to modulation parameters a(x) and a(y), and increases with increasing vortex order. Numerical calculations provide an intuitive physical picture for the effect of the modulation parameters on the propagation of the vortex Airy beam. (c) 2012 Elsevier Ltd. All rights reserved.

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Vortex airy beam; M-2 factor; Moments method; Gauss beams; Moments
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Miss Malisa Diana
Date Deposited: 29 Jul 2013 02:01
Last Modified: 07 Oct 2019 03:18
URI: http://eprints.um.edu.my/id/eprint/8237

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