Abstract

We report the direct generation of vector vortex laser modes at 640 nm from a compact, diode end-pumped continuous-wave ${\rm Pr ^{3 +}}{:}{{\rm LiYF}_4}$ (YLF) laser that utilizes an intracavity lens and diaphragm. On-axis displacement of the intracavity lens, combined with appropriate choice of the intracavity diaphragm, enables selective generation of a desired radial and azimuthal vector laser mode. Such compact, vector vortex laser sources based on ${\rm Pr ^{3 +}}{:}{\rm YLF}$ in the visible wavelength region are a significant enabling technology for a wide range of applications.

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