华中科技大学学报（自然科学版）2011，Vol.39Issue(5)：118-122,5.
整数与分数阶涡旋光束相位奇点的稳定性分析
Stabilization analysis of phase singularity of vortex beams with integral and fractional orders
摘要
Abstract
The stabilization of the center phase singularity for the vortex beam with integral and fractional order was studied by the method of diffraction-integration theory. For the vortex beam with integral orders, the analytical expression of the electric field was deduced while propagating; for the vortex beams with fractional orders, the analytical expression of the electric field could not be obtained after propagation. Only the central electronic field could be analytically provided. Theoretical analysis and numerical simulation show the phase singularity of the integral order vortex beam is stable, the vortex can preserve and the intensity distribution exhibits centrosymmetric character after propagation; however, the phase singularity of the fractional order vortex beam is unstable, the electric field of the center is not equal to zero and the intensity distribution has no character of centrosymmetry after propagation. Experiment shows that the vortex beam with integral order is more suitable for free-space optical communication system.关键词
涡旋光束/稳定性/光强分布/整数阶/分数阶Key words
vortex beam/ stabilization/ intensity distribution/ integral orders fractional order分类
数理科学引用本文复制引用
丁攀峰..整数与分数阶涡旋光束相位奇点的稳定性分析[J].华中科技大学学报（自然科学版）,2011,39(5):118-122,5.基金项目
福建省自然科学基金资助项目(A0810012). （A0810012）
