Search Results - "Vaity, Pravin"

Measuring the topological charge of an optical vortex by using a tilted convex lens by Vaity, Pravin, Banerji, J., Singh, R.P.

“…We demonstrate, analytically and experimentally, a simple, but effective method to determine the topological charge of an optical vortex by using a spherical…”
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Crafting the core asymmetry to lift the degeneracy of optical vortices by Kumar, Ashok, Vaity, Pravin, Singh, R P

“…We introduce an asymmetry in the core of a high charge optical vortex by using an appropriate computer generated hologram. The splitting of a high charge…”
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Nonlinear frequency doubling characteristics of asymmetric vortices of tunable, broad orbital angular momentum spectrum by Alam, Sabir Ul, Rao, A. Srinivasa, Ghosh, Anirban, Vaity, Pravin, Samanta, G. K.

“…We report on a simple experimental scheme to generate and control the orbital angular momentum (OAM) spectrum of the asymmetric vortex beams in a nonlinear…”
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Polarization‐Independent Quasibound States in the Continuum by Vaity, Pravin, Gupta, Harshvardhan, Kala, Abhinav, Dutta Gupta, S., Kivshar, Yuri S., Tuz, Vladimir R., Achanta, Venu Gopal

“…A new property of the trapped mode (bound state in the continuum, BIC) supported by a dielectric resonant metasurface, which changes its lattice symmetry, is…”
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Free space continuous variable Quantum Key Distribution with discrete phases by Rani, Anju, Chandravanshi, Pooja, Ramakrishnan, Jayanth, Vaity, Pravin, Madhusudhan, P., Sharma, Tanya, Bhardwaj, Pranav, Biswas, Ayan, Singh, R.P.

“…Quantum Key Distribution (QKD) offers unconditional security in principle. Many QKD protocols have been proposed and demonstrated to ensure secure…”
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Airy beam optical parametric oscillator by Aadhi, A., Chaitanya, N. Apurv, Jabir, M. V., Vaity, Pravin, Singh, R. P., Samanta, G. K.

“…Airy beam, a non-diffracting waveform, has peculiar properties of self-healing and self-acceleration. Due to such unique properties, the Airy beam finds many…”
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Stability of higher order optical vortices produced by spatial light modulators by Kumar, Ashok, Vaity, Pravin, Bhatt, Jitendra, Singh, R.P.

“…The stability of higher charge optical vortices generated with a spatial light modulator is investigated. It is observed that higher charge vortices split into…”
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Making an optical vortex and its copies using a single spatial light modulator by Kumar, Ashok, Vaity, Pravin, Banerji, J., Singh, R.P.

“…We demonstrate a technique for making copies of optical vortices with the same topological charge using a single spatial light modulator. It has been shown…”
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Design, fabrication and validation of an OAM fiber supporting 36 states by Brunet, Charles, Vaity, Pravin, Messaddeq, Younès, LaRochelle, Sophie, Rusch, Leslie A

“…We present an optical fiber supporting 36 information bearing orbital angular momentum (OAM) states spanning 9 OAM orders. We introduce design techniques to…”
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Mode Division Multiplexing Using Orbital Angular Momentum Modes Over 1.4-km Ring Core Fiber by Nejad, Reza Mirzaei, Allahverdyan, Karen, Vaity, Pravin, Amiralizadeh, Siamak, Brunet, Charles, Messaddeq, Younes, LaRochelle, Sophie, Rusch, Leslie Ann

“…Mode division multiplexing (MDM) systems using orbital angular momentum (OAM) modes can recover the data in D different modes without recourse to full (2D ×…”
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Exploring the route from leaky Berreman modes to bound states in continuum by Remesh, Ghanasyam, Vaity, Pravin, Achanta, Venu Gopal, Dutta Gupta, Subhasish

“…We study coupling of leaky Berreman modes in polar dielectric films (SiO2) through a thin metallic layer (gold) and show the familiar signatures of normal mode…”
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Orbital-Angular-Momentum Polarization Mode Dispersion in Optical Fibers by Wang, Lixian, Vaity, Pravin, Chatigny, Stephane, Messaddeq, Younes, Rusch, Leslie Ann, LaRochelle, Sophie

“…The orbital-angular-momentum (OAM) modes in optical fibers have polarization mode dispersion (PMD) properties similar to those of single-mode fibers (SMFs)…”
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Hyperbolic Metamaterial with Quantum Dots for Enhanced Emission and Collection Efficiencies by Kala, Abhinav, Inam, Faraz Ahmed, Biehs, Svend‐Age, Vaity, Pravin, Achanta, Venu Gopal

“…Bright, room‐temperature stable, on‐demand, and highly directional light sources are essential for quantum optical technologies. A design methodology to…”
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Diffraction characteristics of optical vortex passing through an aperture–iris diaphragm by Kumar, Ashok, Vaity, Pravin, Singh, R.P.

“…The diffraction of an optical vortex through an iris diaphragm which is a close approximation to a circular aperture has been investigated. The results are…”
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Engineering the size of dark core of an optical vortex by Kumar, Ashok, Vaity, Pravin, Krishna, Yedhu, Singh, R.P.

“…An optical vortex is a light beam having a helical wavefront and a zero intensity region, a dark core, in the centre when viewed in the direction of the…”
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Exciting OAM modes in annular-core fibers via perfect OAM beams by Vaity, Pravin, Brunet, Charles, Messaddeq, Younes, LaRochelle, Sophie, Rusch, Leslie A.

“…We generate perfect orbital angular momentum (OAM) beams with controllable ring width and ring diameter using a phase-only spatial light modulator. Perfect OAM…”
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Angular Spectrum of Bound State in the Continuum for Near and Far Field Analysis by Vaity, Pravin, Achanta, Venu Gopal

“…We investigated the angular spectrum of bound state in the continuum (BIC) associated with topological charge and present an empirical tool to characterize…”
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High-power, CW, airy beam optical parametric oscillator by Aadhi, A., Vaity, Pravin, Chaitanya, N. Apurv, Jabir, M. V., Singh, R. P., Samanta, G. K.

“…We demonstrate a new class of optical parametric oscillators producing high-power, output beam in 2-D Airy intensity profile. The Airy beam has output power >8…”
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Free Space Continuous Variable Quantum Key Distribution with Discrete Phases by Rani, Anju, Chandravanshi, Pooja, Ramakrishnan, Jayanth, Vaity, Pravin, Madhusudhan, P, Sharma, Tanya, Bhardwaj, Pranav, Biswas, Ayan, Singh, R. P

“…Quantum Key Distribution (QKD) offers unconditional security in principle. Many QKD protocols have been proposed and demonstrated to ensure secure…”
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Exploring the route from leaky Berreman modes to bound states in continuum by Remesh, Ghanasyam, Vaity, Pravin, Achanta, Venu Gopal, Gupta, Subhasish Dutta

“…Optics Communications, Volume 498, 1 November 2021, 127223 We study coupling of leaky Berreman modes in polar dielectric films (SiO2) through a thin metallic…”
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