Mutual aid instead of mutual restraint:interactive probing for topological charge and phase of a vortex beam of large aberrations  

作　　者：SHENGYANG WU BENLI YU LEI ZHANG 

机构地区：[1]Key Laboratory of Opto-electronic Information Acquisition and Manipulation,Ministry of Education,Anhui University,Hefei 230601,China [2]Information Materials and Intelligent Sensing Laboratory of Anhui Province,Anhui University,Hefei 230601,China

出　　处：《Photonics Research》2024年第1期172-182,共11页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(52275515);Open Funding of Magnetic Confinement Fusion Laboratory of Anhui Province(2023AMF03004)。

摘　　要：An imperfect propagation environment or optical system would introduce wavefront aberrations to vortex beams.The phase aberrations and orbital angular momentum in a vortex beam are proved to be mutually restrictive in parameter measurement.Aberrations make traditional topological charge(TC)probing methods ineffective while the phase singularity makes phase retrieval difficult due to the aliasing between the wrapped phase jump and the vortex phase jump.An interactive probing method is proposed to make measurements of the aberrated phase and orbital angular momentum in a vortex beam assist rather than hinder each other.The phase unwrapping is liberated from the phase singularity by an annular shearing interference technique while the TC value is determined by a Moirétechnique immune to aberrations.Simulation and experimental results proving the method effective are presented.It is of great significance to judge the characteristics of vortex beams passing through nonideal environments and optical systems.

关 键 词：VORTEX TOPOLOGICAL BEAM 

分 类 号：O43[机械工程—光学工程]