Digital generation of super-Gaussian perfect vortex beams via wavefront shaping with globally adaptive feedback  

作　　者：Rui Ma Ke Hai Luo Jing Song He Wei Li Zhang Dian Yuan Fan Anderson S.L.Gomes Jun Liu 

机构地区：[1]International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education,Institute of Microscale Optoelectronics,Shenzhen University,Shenzhen,China [2]Institute for Advanced Study,Shenzhen University,Shenzhen,China [3]Fiber Optics Research Centre,School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu,China [4]Departamento de Física,Universidade Federal de Pernambuco,Recife-PE,Brazil

出　　处：《High Power Laser Science and Engineering》2024年第1期42-51,共10页高功率激光科学与工程（英文版）

基　　金：supported by the Guangdong Basic and Applied Basic Research Foundation(Grant No.2020A1515111143);the Natural Science Foundation of Guangdong Province(Grant Nos.2021A1515011532 and 2023ZDZX3022);Shenzhen Government’s Plan of Science and Technology(Grant Nos.JCYJ20220818100019040,RCYX20210609103157071,and JCYJ20230808105713028)。

摘　　要：High-intensity vortex beams with tunable topological charges and low coherence are highly demanded in applications such as inertial confinement fusion(ICF) and optical communication. However, traditional optical vortices featuring nonuniform intensity distributions are dramatically restricted in application scenarios that require a high-intensity vortex beam owing to their ineffective amplification resulting from the intensity-dependent nonlinear effect. Here, a low-coherence perfect vortex beam(PVB) with a topological charge as high as 140 is realized based on the super-pixel wavefront-shaping technique. More importantly, a globally adaptive feedback algorithm(GAFA) is proposed to efficiently suppress the original intensity fluctuation and achieve a flat-top PVB with dramatically reduced beam speckle contrast. The GAFA-based flat-top PVB generation method can pave the way for high-intensity vortex beam generation,which is crucial for potential applications in ICF, laser processing, optical communication and optical trapping.

关 键 词：digital micromirror device flat-top beam orbital angular momentum perfect vortex beam random fiber laser 

分 类 号：O436[机械工程—光学工程]