100 W, 1 mJ Picosecond Vortex Thin‐Disk Regenerative Amplifier

Abstract

High‐power and high‐energy ultrafast vortex lasers offer great potential for advancing fields such as high‐precision machining, particle manipulation, and strong‐field physics. In this study, a straightforward and efficient approach is presented to generate powerful optical vortices directly from a thin‐disk regenerative amplifier without the need for specially designed elements for optical amplitude and phase modulations. The amplifier generates 15.8‐ps vortex pulses with an average power of 100 W and a pulse energy of 1 mJ at a repetition rate of 100 kHz, representing the highest average power of ultrafast vortex pulses ever obtained directly from an intracavity laser system to date. The demonstrated source combines, for the first time at vortex mode, a high power, a high repetition rate, and pulse energy. In addition, flexible control of the Laguerre–Gaussian, Hermite–Gaussian, and Gaussian modes is achieved within the same resonator by precisely controlling the position of the depletion area within the pump region. This work demonstrates a scalable, robust method for generating high‐power, high‐energy ultrafast vortex pulses at high repetition rate, expanding the potential applications of vortex laser technologies in both science and industry.