# 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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## References

SHOWING 1-10 OF 29 REFERENCES

### Divergence of optical vortex beams.

- PhysicsApplied optics
- 2015

It is shown that the propagation of optical vortices in free space can be analyzed by using the width [w(z)] of the host Gaussian beam and the inner and outer radii of the vortex beam at the source plane as defined in [Opt. Lett.39, 4364].

### Classical to quantum transfer of optical vortices.

- PhysicsOptics express
- 2014

It is shown that an optical vortex beam, implemented classically, can be transferred to the transverse amplitude of a heralded single photon and when the far-field single-photon transverse intensity exhibits the expected triangular arrangement of intensity lobes associated with the presence of orbital angular momentum.

### Frequency-doubling characteristics of high-power, ultrafast vortex beams.

- PhysicsOptics letters
- 2015

It is observed that in the frequency-doubling process, the topological charge has negligible or no effect in temporal and spectral properties of the beams and a novel scheme based on linear optical elements to double the order of any optical vortex at the same wavelength is devised.

### Perfect vortex beam: Fourier transformation of a Bessel beam.

- PhysicsOptics letters
- 2015

The prefect vortex beam generation method can be used to excite OAM modes in an annular core fiber and the theoretical predictions match with the experimental results and also provide an explanation for previous published works.

### Effects of crystal length on the angular spectrum of spontaneous parametric downconversion photon pairs

- Physics
- 2013

We present a theoretical and experimental analysis of the joint effects of the transverse electric field distribution and of the nonlinear crystal characteristics on the properties of photon pairs…

### High quality quasi-Bessel beam generated by round-tip axicon.

- PhysicsOptics express
- 2008

This work shows how the spatial filtration of the beam in the Fourier plane improves this spatial beam distribution and removes the undesired intensity modulation of the quasi-Bessel beam.

### Theory of parametric frequency down conversion of light.

- PhysicsPhysical review. A, General physics
- 1985

It is shown that when two ideal photodetectors are appropriately located so that they receive the conjugate signal and idler photons, then the joint probability of two-photon detection by the two detectors can equal the single-Photon detection probability.

### Generation of the "perfect" optical vortex using a liquid-crystal spatial light modulator.

- PhysicsOptics letters
- 2013

It is shown analytically and experimentally that such a vortex can be approximately generated in the Fourier transforming optical system with a computer-controlled liquid-crystal spatial light modulator.

### Ring pattern of a lens-axicon doublet illuminated by a Gaussian beam.

- PhysicsApplied optics
- 1978

The purpose of this paper is to show that when a lens-axicon combination is illuminated by a Gaussian beam, the transverse distribution of the focal ring is also aGaussian distribution.

### Imaging high-dimensional spatial entanglement with a camera

- PhysicsNature communications
- 2012

It is shown that modern electron-multiplying charge-coupled device cameras can measure correlations in both position and momentum across a multi-pixel field of view and demonstrate Einstein–Podolsky–Rosen type correlations by more than two orders of magnitude.