[1] Anita G T, Umamageswari N, Prabakaran K, et al. Effect of coma on tightly focused cylindrically polarized vortex beams［J］. Optics & Laser Technology, 2016, 76: 1-5.
[2] Padgett M, Courtial J, Allen L. Light′s orbital angular momentum［J］. Physics Today, 2004, 57(5): 139-140.
[3] Anguita J A, Neifeld M A, Vasic B V. Turbulence-induced channel crosstalk in an orbital angular momentum-multiplexed free-space optical link［J］. Applied Optics, 2008, 47(13): 2414-2429.
[4] Molina-Terriza G, Rebane L, Torres J P, et al. Probing canonical geometrical objects by digital spiral imaging［J］. Journal of the European Optical Society Rapid Publications, 2007, 2(3): 07014.
[5] Torner L, Torres J, Carrasco S. Digital spiral imaging［J］. Optics Express, 2005, 13(3): 873-881.
[6] Barnett S M, Allen L.Orbital angular momentum and nonparaxial light beams［J］. Optics Communications, 1994, 110(5-6): 670-678.
[7] Kang Xiaoping, He Zhong. Introduction to laser beam quality evaluation［M］. Shanghai: Shanghai Science and Technology Literature Publishing House, 2007: 3, 72, 140, 176, 185.
[8] Allen L, Beijersbergen M W, Spreeuw R J, et al. Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes［J］. Physical Review A, 1992, 45(11): 8185-8189.
[9] Cerjan A, Cerjan C. Orbital angular momentum of Laguerre-Gaussian beams beyond the paraxial approximation［J］. Journal of the Optical Society of America A, 2011, 28(11): 2253-2260.
[10] Gradshteyn I S, Ryzhik I M. Table of integrals, series and products［M］. 7th edition. New York: Academic Press, 2007: 340.
[11] Zhao C, Wang X, Zhao C, et al. Statistical properties of an anomalous hollow beam with orbital angular momentum［J］. Journal of Modern Optics, 2015, 62(3): 179-185.
