51 citations · 176 across the 22 of their papers we have counts for
22 papers
Talbot effect-based sensor measuring grating period change in subwavelength range
Saumya J. Sarkar, M. Ebrahim-Zadeh, G. K. Samanta
Talbot length, the distance between two consecutive self-image planes along the propagation axis for a periodic diffraction object (grating) illuminated by a plane wave, depends on…
Polarization coverage and self-healing characteristics of Poincaré-Bessel beam
Subith Kumar, Anupam Pal, Arash Shiri +2
As a vector version of scalar Bessel beams, Poincaré-Bessel beams (PBBs) have attracted a great deal of attention due to the presence of polarization singularities and their nondif…
Near-video frame rate quantum sensing using Hong-Ou-Mandel interferometry
Sandeep Singh, Vimlesh Kumar, Varun Sharma +2
Hong-Ou-Mandel (HOM) interference, the bunching of two indistinguishable photons on a balanced beam-splitter, has emerged as a promising tool for quantum sensing. There is a need f…
Simple experimental realization of optical Hilbert Hotel using scalar and vector fractional vortex beams
Subith Kumar, Anirban Ghosh, Chahat Kaushik +4
Historically, infinity was long considered a vague concept - boundless, endless, larger than the largest - without any quantifiable mathematical foundation. This view changed in th…
Single-pass, nonlinear frequency conversion of full Poincaré beams
K. Subith, Ravi K. Saripalli, Anirban Ghosh +1
Full Poincaré (FP) beams, a special class of fully correlated beams generated through the coaxial superposition of a Laguerre-Gauss and fundamental Gaussian modes of orthogonal pol…
Imaging inspired characterization of single photons carrying orbital angular momentum
Vimlesh Kumar, Varun Sharma, Sandeep Singh +4
We report on an imaging-inspired measurement of orbital angular momentum (OAM) using only a simple tilted lens and an Intensified Charged Coupled Device (ICCD) camera, allowing us…
Controlled generation of array beams of higher order orbital angular momentum and study of their frequency doubling characteristics
B. S. Harshith, G. K. Samanta
We report on a simple and compact experimental scheme to generate high power, ultrafast, higher order vortex array beams. Simply by using a dielectric microlens array (MLA) and a p…
Single-pass, second harmonic generation of ultrafast, higher order vector vortex beams at blue
Ravi Kiran Saripalli, Anirban Ghosh, N. Apurv Chaitanya +1
We report a novel experimental scheme for single-pass second harmonic generation (SHG) of vector vortex beam in the blue. Using an ultrafast Ti:Sapphire laser of pulse width ~17 fs…
Simultaneous generation of high power, ultrafast 1D and 2D Airy beams and their frequency doubling characteristics
Raghwinder S. Grewal, Anirban Ghosh, G. K. Samanta
We report on a simple experimental scheme based on a pair of cylindrical lenses (convex and concave) of same focal length and common optical elements producing high power optical b…
Controlling the biphoton orbital angular momentum eigenmodes using asymmetric pump vortex beam
M. V. Jabir, Ali Anwar, G. K. Samanta
We report on controlling the bi-photon orbital angular momentum (OAM) eigenmodes in the spontaneous parametric down conversion process by simply adjusting the asymmetry of the pump…
High-power, continuous-wave, tunable mid-IR, higher-order vortex beam optical parametric oscillator
A. Aadhi, Varun Sharma, G. K. Samanta
We report on a novel experimental scheme to generate continuous-wave (cw), high power, and higher-order optical vortices tunable across mid-IR wavelength range. Using cw, two-cryst…
Controlled generation, manipulation and frequency conversion of broadband orbital angular momentum spectrum of asymmetric optical vortex beams
Sabir Ul Alam, A. Srinivasa Rao, Anirban Ghosh +2
We report on generation and control of tunable, broad orbital angular momentum (OAM) spectrum of a vortex beam. Using two spiral phase plates (SPPs), we have converted the Gaussian…
High-power, high repetition rate, tunable, ultrafast vortex beam in the near-infrared
A. Aadhi, G. K. Samanta
We report on experimental demonstration of high power, ultrafast, high repetition rate vortex beam source tunable in the near-IR wavelength range. Based on single-pass optical para…
Robust, high brightness, degenerate entangled photon source at room temperature
M. V. Jabir, G. K. Samanta
We report on a compact, simple and robust high brightness entangled photon source at room temperature. Based on a 30 mm long periodically poled potassium titanyl phosphate (PPKTP),…
Direct transfer of classical non-separable state into hybrid entangled two photon state
M. V. Jabir, N. Apurv Chaitanya, Manoj Mathew +1
Hybrid entangled states, having entanglement between different degrees-of-freedom (DoF) of a particle pair, are of great interest for quantum information science and communication…
Hollow Gaussian beam generation through nonlinear interaction of photons with orbital-angular-momemtum
N. Apurv Chaitanya, M. V. Jabir, J. Banerji +1
Hollow Gaussian beams (HGB) are a special class of doughnut shaped beams that do not carry orbital angular momentum (OAM). Such beams have a wide range of applications in many fiel…
Generation of perfect vortex of variable size and its effect in angular spectrum of the down-converted photons
M. V. Jabir, N. Apurv Chaitanya, A. Aadhi +1
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…
Efficient nonlinear generation of high power, higher order, ultrafast "perfect" vortices in green
N. Apurv Chaitanya, M. V. Jabir, G. K. Samanta
We report on efficient nonlinear generation of ultrafast, higher order "perfect" vortices at the green wavelength. Based on Fourier transformation of the higher order Bessel-Gauss…
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…
Three particle Hyper Entanglement: Teleportation and Quantum Key Distribution
P. Chithrabhanu, A. Aadhi, Salla Gangi Reddy +4
We present a scheme to generate three particle hyper-entanglement utilizing polarization and orbital angular momentum (OAM) of a photon. We show that the generated state can be use…
Fiber-laser-pumped Ti:sapphire laser
G. K. Samanta, S. Chaitanya Kumar, Kavita Devi +1
We report the first experimental demonstration of efficient and high-power operation of a Ti:sapphire laser pumped by a simple, compact, continuous-wave (cw) fiber-laser-based gree…