Microaxicons for ultrashort Wave packets III - MAXWELL III

在联合项目Maxwell中，研究了用于超短脉冲激光器的新一代基于MEMS的自适应光学元件的基本原理。之前的项目阶段专注于基于压电式和热致动型的快速、低色散轴锥。此外，还分析了阵列的特定效应，并针对选定的应用进行了原理验证测试。确定了不同类型MEMS的优缺点，并与液晶空间光调制器(SLM)进行了比较。开发了检测系统和分析算法。在这些结果的基础上，我们建议将该项目再延长(最后)两年。计划继续研究具有特别高创新潜力的五种方法：(1)由高分辨率SLM和快速MEMS组成的组合系统(能够有效地减少衍射失真)，(2)具有优化的时间脉冲传输的自适应非衍射Talbot自成像，(3)用于自适应产生加速超快波包的艾里-菲涅耳镜，(4)OAM编码的超短波包的波前传感，以及(5)透射式自由形式轴锥和螺旋相位元件。这些任务有望为下一代自适应光学的系统结构、组件和应用提供重要的科学贡献。

In the joint project MAXWELL, fundamentals of a new generation of MEMS-based adaptive optical components for ultrashort-pulsed lasers are investigated. Previous project stages were focused on fast, low-dispersion axicons based on piezo-electric and thermal actuation. Moreover, array specific effects were analyzed and proof-of-principle tests for selected application were performed. Advantages and disadvantages of different MEMS types were identified and compared to liquid crystal spatial light modulators (SLMs). Detection systems and analysis algorithms were developed. Building on these results, we propose an extension of the project for a further (final) period of two years. The planned continuation addresses five approaches with particularly high innovative potential: (1) combined systems consisting of high-resolution SLMs and fast MEMS (enabling for an efficient reduction of diffractive distortions), (2) adaptive nondiffractive Talbot self-imaging with optimized temporal pulse transfer, (3) Airy-Fresnel mirrors for the adaptive generation of accelerated ultrafast wavepackets, (4) OAM-encoded wavefront sensing of ultrashort wavepackets, and (5) transmissive free-form axicons and spiral phase elements. These tasks are expected to provide the significant scientific contributions to system architectures, components and applications of nest generation adaptive optics.