Polygonal Vortex Beams

@article{Shen2018PolygonalVB,
  title={Polygonal Vortex Beams},
  author={Yijie Shen and Zhensong Wan and Yuan Meng and Xing Fu and Mali Gong},
  journal={IEEE Photonics Journal},
  year={2018},
  volume={10},
  pages={1-16}
}
We originally exploit the vortex beams with patterns of closed polygons [namely, polygonal vortex beams (PVBs)] generated by a quasi-frequency-degenerate (QFD) Yb:CALGO laser resonator with astigmatic transformation. The PVBs with peculiar patterns of triangular, square, and parallelogram shapes carrying large orbital angular momentums (OAMs) are theoretically investigated and experimentally obtained in the vicinity of the SU(2) degenerate states of laser resonator. The PVBs in QFD states are… 

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