We propose a method to achieve high-resolution femtosecond laser beam shaping (HR-FLBS) via digital holography based on a digital mirror device (DMD) and optimized optical design. By programming the hologram on the DMD, we captured several patterns such as light spots, decorated letters of “HUST” (Huazhong University of Science and Technology), and a series of concentric annuli whose fine structure approaches the optical diffraction limit. The experimental results confirm that the proposed method can shape the amplitude and phase of a femtosecond laser arbitrarily with high resolution.

中文翻译：

---

通过数字全息术实现高分辨率飞秒激光束整形

我们提出了一种基于数字镜面设备（DMD）和优化的光学设计，通过数字全息技术实现高分辨率飞秒激光束整形（HR-FLBS）的方法。通过在DMD上对全息图进行编程，我们捕获了多种图案，例如光斑，装饰有“ HUST”的字母（华中科技大学）以及一系列同心环，其精细结构接近光学衍射极限。实验结果证明，该方法可以对飞秒激光的振幅和相位进行任意形状的高分辨率调整。