Abstract

The creation of ultraviolet optical vortex beams with the topological charge of $ \vert l \vert = 1 $ at the wavelength of 325 nm was demonstrated from a He–Cd metal vapor laser with a spot defect mirror. The measured $ {{\rm M}^2} $ factor was close to the theoretical value of two of the $ {{\rm LG}_{01}} $ Laguerre–Gaussian mode. Some interference experiments showed that the obtained vortex beams were stable enough for practical applications such as holographic lithography.

© 2020 Optical Society of America

Direct generation of femtosecond vortex beam from a Yb:KYW oscillator featuring a defect-spot mirror

Sha Wang, Zhigang Zhao, Isao Ito, and Yohei Kobayashi
OSA Continuum 2(3) 523-530 (2019)

Ultrafast optical vortex beam generation in the ultraviolet

N. Apurv Chaitanya, S. Chaitanya Kumar, Kavita Devi, G. K. Samanta, and M. Ebrahim-Zadeh
Opt. Lett. 41(12) 2715-2718 (2016)

High-energy 2 µm pulsed vortex beam excitation from a Q-switched Tm:LuYAG laser

Ying Chen, Manman Ding, Jianlei Wang, Li Wang, Qiyao Liu, Yongguang Zhao, Ying Liu, Deyuan Shen, Zhengping Wang, Xinguang Xu, and Valentin Petrov
Opt. Lett. 45(3) 722-725 (2020)

Generation of a mid-infrared femtosecond vortex beam from an optical parametric oscillator

Hui Tong, Guoqiang Xie, Zhen Qiao, Zhipeng Qin, Peng Yuan, Jingui Ma, and Liejia Qian
Opt. Lett. 45(4) 989-992 (2020)

High-performance terahertz vortex beam generator based on square-split-ring metasurfaces

Kaixiang Cheng, Zhengda Hu, Yiqing Wang, Jing Ma, and Jicheng Wang
Opt. Lett. 45(21) 6054-6057 (2020)