Longman Andrew, Salgado Carlos, Zeraouli Ghassan, Apiñaniz Jon I, Antonio Pérez-Hernández Jose, Eltahlawy M Khairy, Volpe Luca, Fedosejevs Robert
Opt Lett. 2020 Apr 15;45(8):2187-2190. doi: 10.1364/OL.387363.
In this work, we present a novel, to the best of our knowledge, and practical method for generating optical vortices in high-power laser systems. Off-axis spiral phase mirrors are used at oblique angles of incidence in the beam path after amplification and compression, allowing for the generation of high-power optical vortices in almost any laser system. An off-axis configuration is possible via modification of the azimuthal gradient of the spiral phase helix and is demonstrated with a simple model using a discrete spiral staircase. This work presents the design, fabrication, and implementation of off-axis spiral phase mirrors in both low- and high-power laser systems.
在本工作中，据我们所知，我们提出了一种新颖且实用的方法，用于在高功率激光系统中产生光学涡旋。离轴螺旋相位镜在放大和压缩后的光束路径中以斜入射角使用，这使得几乎在任何激光系统中都能产生高功率光学涡旋。通过修改螺旋相位螺旋的方位角梯度可以实现离轴配置，并且用一个使用离散螺旋楼梯的简单模型进行了演示。这项工作展示了低功率和高功率激光系统中离轴螺旋相位镜的设计、制造和应用。
