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High-order LG vortex Pr:YLF laser emitting in the visible wavelength range for the measurement of angular velocity

High-order vortex beams carrying orbital angular momentum in the visible wavelength range are of tremendous interest for a diversity of applications, including super-resolution imaging, microfabrication, and underwater communications. Such beams can be generated directly from compact solid-state las...

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Bibliographic Details
Published in:Applied physics letters 2024-08, Vol.125 (7)
Main Authors: Zhang, Yu, Yan, Aoyu, Qi, Yaoyao, Lü, Jia-Qi, An, Jiashuo, Sheng, Quan, Bai, Zhenxu, Wang, Yulei, Lu, Zhiwei
Format: Article
Language:English
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Summary:High-order vortex beams carrying orbital angular momentum in the visible wavelength range are of tremendous interest for a diversity of applications, including super-resolution imaging, microfabrication, and underwater communications. Such beams can be generated directly from compact solid-state lasers; however, they generally have low topological charge number. In this work, we demonstrate the generation of high-order Laguerre–Gaussian (LG) modes from a simple Pr:YLF laser cavity and demonstrate its application in the measurement of angular velocity. We utilize enhanced intracavity spherical aberration to generate LG0,±m modes with m selectable up to 34, directly from a Pr:YLF laser operating at 640 nm. We utilize this laser beam in an off-axis illumination geometry in conjunction with the rotational Doppler effect, to measure the angular velocity of a spinning object. The demonstration highlights a potential application for these types of vortex laser.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0211452