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

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外文摘要：Multi-focus parallel scanning can effectively increase laser fabrication throughput.However,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 SLM.Here we demonstrate a multi-focus non-periodic scanning method for femtosecond lasers by using,instead,a fast-switching digital micromirror device[DMD]to generate a dynamic number of foci.The number of effective foci is quickly switched by introducing aberration to the undesired focus.In 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 energy.Finally,we validate the effectiveness of this scanning method by demonstrating corneal flap fabrication of porcine cornea in vitro.

外文关键词：

multi-focusnon-periodic trajectorydigital micromirror deviceaberration controlcorneal cutting

作者：

李华明、王雨、胡庆磊、张卓宇、吕晓华、曾绍群

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作者单位：

Britton Chance Center for Biomedical Photonics,Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China

MOE Key Laboratory for Biomedical Photonics,Collaborative Innovation Center for Biomedical Engineering,School of Engineering Sciences,Huazhong University of Science and Technology,Wuhan 430074,China

基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of China(NSFC)Hubei Province Science and Technology Plan Project

项目编号：

2022YFC2404500620750772022BCA049

出版年：

2024

DOI：

10.3788/COL202422.051701

中国光学快报(英文版)

中国光学学会中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD

影响因子：1.305

ISSN：1671-7694

年,卷(期)：2024.22(5)