
A vortex beam at eye-safe band is emitted from a solid-state laser resonator. Such beam carries orbital angular momentum and is employed to sense the spinning cyclone via the rotational Doppler effect. As an ideal class of vortex sources, solid-state vortex lasers at eye-safe band have attracted considerable attention due to their potentials in multi-functional LiDAR. In the Perspective Article (DOI: 10.1002/nap2.70006), Shiyao Fu and co-workers summarize the schemes of eye-safe vortex lasers and discuss their prospects for future development.
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