摘要
Vortex splitting is one of the main causes of instability in orbital angular momentum(OAM) modes transmission. Recent advances in OAM modes free-space propagation have demonstrated that abruptly autofocusing Airy vortex beams(AAVBs) can potentially mitigate the vortex splitting effect. However, different modes of vortex embedding will affect the intensity gradients of the background beams, leading to changes in the propagation characteristics of vortex beams. This study presents the unification of two common methods of coupling autofocusing Airy beams with vortices by introducing a parameter(m), which also controls the intensity gradients and focusing properties of the AAVBs. We demonstrate that vortex splitting can be effectively reduced by selecting an appropriate value of the parameter(m) according to different turbulence conditions. In this manner,the performance of OAM-based free-space optical systems can be improved.
Vortex splitting is one of the main causes of instability in orbital angular momentum(OAM) modes transmission. Recent advances in OAM modes free-space propagation have demonstrated that abruptly autofocusing Airy vortex beams(AAVBs) can potentially mitigate the vortex splitting effect. However, different modes of vortex embedding will affect the intensity gradients of the background beams, leading to changes in the propagation characteristics of vortex beams. This study presents the unification of two common methods of coupling autofocusing Airy beams with vortices by introducing a parameter(m), which also controls the intensity gradients and focusing properties of the AAVBs. We demonstrate that vortex splitting can be effectively reduced by selecting an appropriate value of the parameter(m) according to different turbulence conditions. In this manner,the performance of OAM-based free-space optical systems can be improved.
作者
Xu Yan
Lixin Guo
Mingjian Cheng
Shuirong Chai
闫旭;郭立新;程明建;柴水荣(State Key Laboratory of Integrated Service Networks, Xidian University;School of Physics and Optoelectronic Engineering, Xidian University;School of Electronic Engineering, Xidian University)
基金
supported by the Innovation Fund of Xidian University(No.20108183448)
the Key Industrial Innovation Chain Project in Industrial Domain(No.2017ZDCXL–GY–06–02)
the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(No.61621005)
the National Natural Science Foundation of China(No.41806210)
the Fundamental Research Funds for the Central Universities(No.CJT150502)
