54 citations · 185 across the 14 of their papers we have counts for
14 papers
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…
Diffracting and Non-diffracting random fields
Patnala Vanitha, Bhargavi M, Venkateswarlu Annapureddy +3
We have generated and propagated both diffracting and non-diffracting speckles using the scattering of perfect optical vortices. The diffracting speckles have been realized in the…
Physical Unclonable Functions using speckle patterns of perfect optical vortices
Patnala Vanitha, Bhargavi Manupati, Inbarasan Muniraj +3
Encryption techniques demonstrate a great deal of security when implemented in an optical system (such as holography) due to the inherent physical properties of light and the preci…
Quantum Information with Even/Odd States of Orbital Angular Momentum of Light
Chithrabhanu Perumangatt, Nijil Lal, Ali Anwar +2
We address the possibility of using even/odd states of orbital angular momentum (OAM) of photons for the quantum information tasks. Single photon qubit states and two photon entang…
Pancharatnam phase in non-separable states of light
Chithrabhanu Perumangatt, Salla Gangi Reddy, Nijil Lal +3
We generate the non-separable state of polarization and orbital angular momentum (OAM) using a laser beam. The generated state undergoes a cyclic polarization evolution which intro…
Selecting the pre-detection characteristics for effective fiber coupling of entangled photon sources
Ali Anwar, Chithrabhanu P, Salla Gangi Reddy +2
Photon modes have an important role in characterizing the quantum sources of light. Proper coupling of various photon modes obtained in spontaneous parametric down conversion (SPDC…
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…
Violation of Bell's inequality for phase singular beams
Shashi Prabhakar, Salla Gangi Reddy, A. Aadhi +3
We have considered optical beams with phase singularity and experimentally verified that these beams, although being classical, have properties of two mode entanglement in quantum…
Spatial distribution of Spontaneous Parametric Down-Converted Photons for higher order Optical Vortices
Shashi Prabhakar, Salla Gangi Reddy, A Aadhi +4
We make a source of entangled photons (SEP) using spontaneous parametric down-conversion (SPDC) in a non-linear crystal and study the spatial distribution of photon pairs obtained…
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…
Experimental generation of ring-shaped beams with random sources
Salla Gangi Reddy, Ashok Kumar, Shashi Prabhakar +1
We have experimentally reproduced ring shaped beams from the scattered Laguerre-Gaussian and Bessel-Gaussian beams. A rotating ground glass plate is used as a scattering medium and…
Measuring Mueller matrix of an arbitrary optical element with a fixed set of polarization optics
Salla Gangi Reddy, Shashi Prabhakar, A. Aadhi +4
We have described a novel way to determine the Mueller matrix of any optical element by using projection method. For this purpose, we have used two universal SU(2) gadgets for pola…