Abstract
Based on the perturbative series representation of a complex-source-point spherical wave an expression for cylindrically symmetrical complex-argument Laguerre–Gauss beams of radial order n is derived. This description acquires the accuracy up to any order of diffraction angle, and its first three corrected terms are in accordance with those given by Seshadri [Opt. Lett. 27, 1872 (2002)] based on the virtual source method. Numerical results show that on the beam axis the number of orders of nonvanishing nonparaxial corrections is equal to n. Meanwhile a higher radial mode number n leads to a smaller convergent domain of radius.
© 2008 Optical Society of America
Full Article | PDF ArticleMore Like This
S. R. Seshadri
Opt. Lett. 27(21) 1872-1874 (2002)
S. R. Seshadri
Opt. Lett. 31(5) 619-621 (2006)
S. R. Seshadri
Opt. Lett. 32(9) 1159-1161 (2007)