Generation of “perfect” vortex of variable size and its effect in angular spectrum of the down-converted photons

@article{Jabir2016GenerationO,
  title={Generation of “perfect” vortex of variable size and its effect in angular spectrum of the down-converted photons},
  author={M. V. Jabir and N. Apurv Chaitanya and A Aadhi and Goutam Kumar Samanta},
  journal={Scientific Reports},
  year={2016},
  volume={6}
}
The “perfect” vortex is a new class of optical vortex beam having ring radius independent of its topological charge (order). One of the simplest techniques to generate such beams is the Fourier transformation of the Bessel-Gauss beams. The variation in ring radius of such vortices require Fourier lenses of different focal lengths and or complicated imaging setup. Here we report a novel experimental scheme to generate perfect vortex of any ring radius using a convex lens and an axicon. As a… 

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