Multi-focus non-periodic scanning method for femtosecond lasers based on DMD and galvanometer scanners[Invited]

作     者：李华明 王雨 胡庆磊 张卓宇 吕晓华 曾绍群 Huaming Li;Yu Wang;Qinglei Hu;Zhuoyu Zhang;Xiaohua Lü;Shaoqun Zeng

作者机构：Britton Chance Center for Biomedical PhotonicsWuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China MOE Key Laboratory for Biomedical PhotonicsCollaborative Innovation Center for Biomedical EngineeringSchool of Engineering SciencesHuazhong University of Science and TechnologyWuhan 430074China 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2024年第22卷第5期

页      面：89-94页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：This work was supported by the National Key Research and Development Program of China(No.2022YFC2404500) the National Natural Science Foundation of China(NSFC)(No.62075077) the Hubei Province Science and Technology Plan Project(No.2022BCA049) 

主　　题：multi-focus non-periodic trajectory digital micromirror device aberration control corneal cutting 

摘      要：Multi-focus parallel scanning can effectively increase laser fabrication ***,the conventional approach of using a spatial light modulator(SLM)to generate multi-foci and scan this fixed number of foci with galvanometer scanners can only achieve a periodic scanning trajectory due to the low switching speed of the *** we demonstrate a multifocus non-periodic scanning method for femtosecond lasers by using,instead,a fast-switching digital micromirror device(DMD)to generate a dynamic number of *** number of effective foci is quickly switched by introducing aberration to the undesired *** this way,the intensity allocated to each focus will not be affected by the number of foci,and a uniformity of 98%with different numbers of foci is achieved without adjusting the total laser ***,we validate the effectiveness of this scanning method by demonstrating corneal flap fabrication of porcine cornea in vitro.