Abstract

We report on optical vortex lattices (OVL) beams with phase-singularity arrays from a large-aperture diode-pumped Yb:CALGO laser. A distinct transverse-mode-locking (TML) effect is found in the OVL formation via controlling pump aperture and off-axis displacement. Various OVL patterns with vortex arrays can be generated in a TML state. While in a non-TML state, the emission is always a high-order Hermite–Gaussian or Ince–Gaussian mode. Interestingly, a stable TML can be started from a non-TML state by an intentionally induced perturbation. Based on the TML principle, a new closed-form expression is theoretically proposed for interpreting the transverse patterns and the evolution principle of various OVL modes, showing good agreement with the experimental results.

© 2018 Optical Society of America

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Supplementary Material (3)

NameDescription
» Visualization 1       The experimental evolution of vortex lattices versus off-axis displacement under the pump radius of ωp˜0.8 mm.
» Visualization 2       The experimental evolution of vortex lattices versus off-axis displacement under the pump radius of ωp˜1.2 mm.
» Visualization 3       The experimental evolution of vortex lattices versus off-axis displacement under the pump radius of ωp˜1.5 mm.

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Equations (7)

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