4 papers
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…
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…