V
Vishwa Pal
Researcher at Indian Institute of Technology Ropar
Publications - 55
Citations - 527
Vishwa Pal is an academic researcher from Indian Institute of Technology Ropar. The author has contributed to research in topics: Laser & Coherence (physics). The author has an hindex of 11, co-authored 47 publications receiving 396 citations. Previous affiliations of Vishwa Pal include Weizmann Institute of Science & Jawaharlal Nehru University.
Papers
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Observing Dissipative Topological Defects with Coupled Lasers
TL;DR: Observe dissipative topological defects in a one-dimensional ring of phased-locked lasers, and show how their formation is related to the Kibble-Zurek mechanism and is governed in a universal manner by two competing time scales.
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Measurement of the coupling constant in a two-frequency VECSEL.
Vishwa Pal,P. Trofimoff,B.-X. Miranda,Ghaya Baili,Mehdi Alouini,Loic Morvan,Daniel Dolfi,Fabienne Goldfarb,Isabelle Sagnes,Rupamanjari Ghosh,Fabien Bretenaker +10 more
TL;DR: The coupling constant between the two perpendicularly polarized eigenstates of a two-frequency Vertical External Cavity Surface Emitting Laser (VECSEL) is measured.
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Rapid laser solver for the phase retrieval problem
Chene Tradonsky,Igor Gershenzon,Vishwa Pal,Vishwa Pal,Ronen Chriki,Asher A. Friesem,Oren Raz,Nir Davidson +7 more
TL;DR: In this paper, a digital degenerate cavity laser is used to reconstruct an object from its scattered intensity distribution, where the most probable lasing mode rapidly and efficiently reconstructs the object.
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Manipulating the spatial coherence of a laser source.
Ronen Chriki,Micha Nixon,Vishwa Pal,Chene Tradonsky,Gilad Barach,Asher A. Friesem,Nir Davidson +6 more
TL;DR: The spatial coherence is shown to depend on the geometry of the masks and is demonstrated with different mask geometries: a variable slit, an annular ring and a circular aperture array which generate spatial coherent functional forms of cosine, Bessel and comb, respectively.
Journal ArticleDOI
Intensity noise correlations in a two-frequency VECSEL.
Syamsundar De,Vishwa Pal,A. El Amili,G. Pillet,Ghaya Baili,Mehdi Alouini,Isabelle Sagnes,Rupamanjari Ghosh,Fabien Bretenaker +8 more
TL;DR: An experimental and theoretical study of the intensity noise correlation between the two orthogonally polarized modes in a dual frequency Vertical External Cavity Surface Emitting Laser (VECSEL), which shows that for small coupling the noise correlation amplitude and phase spectra remain nearly flat, but for higher values of the coupling constant the low frequency behaviors are drastically changed.