Vectorial structural characteristics of four-petal Gaussian beams in the far field
Department of Optical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, P.R. China
Corresponding author: email@example.com
Accepted: 11 March 2010
Published online: 23 April 2010
Based on the vector angular spectrum theory of electromagnetic waves and the method of stationary phase, analytical vector structures of four-petal Gaussian beams (FPGB) in the far field are derived. The energy flux for the TE term, TM term and the whole beam are represented and illustrated with numerical examples. Effects of beam orders and paraxial degrees on energy flux distributions are discussed in detail, and the corresponding analytical explanations are also given. These results may provide a new approach to manipulate other higher-order laser beams in the far field.
© EDP Sciences, 2010