Abstract
We construct a compact unidirectional Nd:YVO4 ring laser generating watt-level vortex beam (LG01) output with high mode purity (98%) in a single longitudinal mode. This was enabled through a wedge-plate shearing interferometer (WPSI) acting as a Gaussian to LG01 mode conversion device and output coupler. This compact and cheap device uses off-the-shelf components. The design could be adapted to any gain medium for wavelength versatility.
© 2022 IEEE
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