64 citations · 513 across the 27 of their papers we have counts for
8 papers · 1 filter
Intensity correlations in perturbed optical vortices: Diagnosis of the topological charge
Patnala Vanitha, Bhargavi Manupati, Salla Gangi Reddy +3
We propose and experimentally verify a novel scheme for diagnosing the order of a perturbed optical vortex using its 2-D spatial autocorrelation function. The order of a vortex was…
High-accuracy longitudinal position measurement using self-accelerating light
Shashi Prabhakar, Stephen Plachta, Marco Ornigotti +1
Radially self-accelerating light exhibits an intensity pattern that describes a spiraling trajectory around the optical axis as the beam propagates. In this article, we show in sim…
Divergence of optical vortex beams
Salla Gangi Reddy, Chithrabhanu P, Shashi Prabhakar +3
We show, both theoretically and experimentally, that the propagation of optical vortices in free space can be analysed by using the width () of the host Gaussian beam and the…
A polarization gadget with two quarter wave plates: Application to Mueller Polarimetry
Salla Gangi Reddy, Shashi Prabhakar, Chithrabhanu Perumangattu +2
We show that there are number of ways to transform an arbitrary polarization state to another with just two quarter wave plates (QWP). We have verified this geometrically using the…
Higher order optical vortices and formation of speckles
Salla Gangi Reddy, Shashi Prabhakar, Ashok Kumar +2
We have experimentally generated higher order optical vortices and scattered them through a ground glass plate that results in speckle formation. Intensity autocorrelation measurem…
Propagation of an arbitrary vortex pair through an astigmatic optical system and determination of its net topological charge
Salla Gangi Reddy, Shashi Prabhakar, A Aadhi +2
We embed a pair of vortices with different topological charges in a Gaussian beam and study its evolution through an astigmatic optical system, a tilted lens. The propagation dynam…