Ultrafast vortex arrays generated from a mode-locked oscillator with dispersion management

作者：Pan Guo, Yongjie Pu, Jie Zhu, Huinan Li, Minyu Fan, Sha Wang · 发表于：Optics Letters · 年份：2023 · DOI：10.1364/ol.499214 · 被引用次数：4 · 研究领域：Orbital Angular Momentum in Optics、Advanced Fiber Laser Technologies、Photonic Crystal and Fiber Optics

Herein, we demonstrate the generation of optical vortex arrays pulses using a Sagnac common-path interferometric vortex generator. Hermite–Gaussian (HG) modes with different orders are initially obtained from a SESAM mode-locked laser in the positive dispersion regime. Then, in the interferometric vortex generator, by controlling the phase difference and sheering displacement between two HG modes, optical vortex pulses with different numbers of phase singularities are generated through superposition. The generated HG 10 mode has a pulse width of 2 ps and maximum energy of 0.75 nJ. One-dimensional vortex arrays and triangular vortex arrays are also generated, which are formed by HG m0 and HG 0n modes, respectively. This work has potential applications in the massive manipulation of microparticles, optical communication, and so on.