Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Praveen Kumar Velpula"'
Autor:
Thomas Willemsen, Tobias Groß, Mealnie Gauch, Henrik Ehlers, Daniel Kramer, Praveen Kumar Velpula, Wolfgang Ebert
Publikováno v:
Laser-Induced Damage in Optical Materials 2022.
Autor:
Zbyněk Hubka, Karel Majer, Irena Majerová, Bedřich Rus, Praveen Kumar Velpula, Jonathan T. Green, Jack A. Naylon, Roman Antipenkov, Jakub Novák, Robert Boge, Pavel Bakule, Daniel B. Kramer, Václav Šobr
Publikováno v:
Applied optics. 60(3)
Vacuum chambers are frequently used in high-energy, high-peak-power laser systems to prevent deleterious nonlinear effects, which can result from propagation in air. In the vacuum sections of the Allegra laser system at ELI-Beamlines, we observed deg
Autor:
Madhura Somayaji, Manoj Kumar Bhuyan, Praveen Kumar Velpula, Florent Bourquard, C. D'Amico, Jean-Philippe Colombier, Razvan Stoian
Publikováno v:
Scientific Reports
Scientific Reports, Nature Publishing Group, 2020, 10 (1), ⟨10.1038/s41598-020-71819-9⟩
Scientific Reports, Vol 10, Iss 1, Pp 1-9 (2020)
Scientific Reports, Nature Publishing Group, 2020, 10 (1), ⟨10.1038/s41598-020-71819-9⟩
Scientific Reports, Vol 10, Iss 1, Pp 1-9 (2020)
International audience; We describe the evolution of ultrafast-laser-excited bulk fused silica over the entire relaxation range in one-dimensional geometries fixed by non-diffractive beams. Irradiation drives local embedded modifications of the refra
Publikováno v:
Coatings
Volume 10
Issue 6
Coatings, Vol 10, Iss 603, p 603 (2020)
Volume 10
Issue 6
Coatings, Vol 10, Iss 603, p 603 (2020)
The laser-induced damage threshold (LIDT) of optical components is one of the major constraints in developing high-power ultrafast laser systems. Multi-layer dielectric (MLD) coatings-based optical components are key parts of high-power laser systems
Autor:
Alexander R. Meadows, Bedřich Rus, Daniel B. Kramer, Michal Ďurák, Praveen Kumar Velpula, Monika Vilémová
Publikováno v:
Optics letters. 44(21)
To optimize optical coating materials, designs, and technologies for high damage resistance, understanding the growth of laser damage is of paramount importance. In this Letter, we show the evolution of femtosecond laser damage in a hafnia-silica (Hf
Publikováno v:
Short-pulse High-energy Lasers and Ultrafast Optical Technologies.
Autor:
François Courvoisier, Razvan Stoian, Manoj Kumar Bhuyan, Jean-Philippe Colombier, Hao Zhang, Praveen Kumar Velpula
Publikováno v:
Laser & Photonics Reviews. 10:230-244
Thumbnail image of graphical abstract Nondiffractive ultrafast optical beams with quasi-stationary characteristics enable new regimes and scales in light-matter interactions. We discuss the action of ultrashort Bessel laser beams in bulk fused silica
Publikováno v:
Optical Engineering. 59:1
Ultrahigh peak power laser systems require highly absorptive and high-damage threshold beam dumps, which allow safe and reliable termination of the beam path in vacuum. We present promising optical materials for high-power laser beam dump designs. In
Autor:
Praveen Kumar Velpula, Jean-Philippe Colombier, Manoj Kumar Bhuyan, Razvan Stoian, Madhura Somayaji
Publikováno v:
Journal of Laser Micro/Nanoengineering
Journal of Laser Micro/Nanoengineering, Japan Laser Processing Society, 2017, 12 (3), pp.274. ⟨10.2961/jlmn.2017.03.0017⟩
JLS
Journal of Laser Micro/Nanoengineering, Japan Laser Processing Society, 2017, 12 (3), pp.274. ⟨10.2961/jlmn.2017.03.0017⟩
JLS
International audience; With a quest to develop rapid and reliable three-dimensional nanofabrication techniques for photonicand fluidic applications, we exploited the potential of zero-order Bessel beams for fabricatinghigh aspect ratio nano-structur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e3416983909324e7467264154705ba8
https://hal-ujm.archives-ouvertes.fr/ujm-01667880
https://hal-ujm.archives-ouvertes.fr/ujm-01667880
Autor:
G. Johnson, M. A. Drouin, Emily Sistrunk, T. Havlíček, Gavin Friedman, R. Baše, Christopher D. Marshall, L. Koubíková, Zbyněk Hubka, Daniel B. Kramer, Shawn Betts, A. Jochmann, S. Telford, Robert Boge, David A. Smith, A. Honsa, Mikael Martinez, Davorin Peceli, Cristina Hernandez-Gomez, František Batysta, Klaus Ertel, Todd Ditmire, Doug Hammond, P. Korous, Štěpán Vyhlídka, K. Kasl, Jonathan T. Green, J. C. Lagron, Thomas Metzger, P. Hribek, Martin Horáček, D. Snopek, E. Koh, Christopher J Edwards, J. Thoma, M. Laub, Gilles Chériaux, Michal Koselja, J. Weiss, Tomáš Mazanec, E. Verhagen, Jakub Novák, Jan Hubáček, Alvin C. Erlandson, Paul Mason, Josef Cupal, Tayyab I. Suratwala, J. Horner, Alexander R. Meadows, J. Jarboe, John R. Collier, Martin Fibrich, Jan Bartoníček, J. Stanley, S. Buck, M. Schultze, Jiri Polan, M. Kepler, Boguslaw Tykalewicz, Michal Ďurák, P. Homer, T. Spinka, C. Frederickson, Pavel Bakule, Pavel Trojek, Christopher J. Stolz, Václav Šobr, D. Mason, Roman Antipenkov, Andy J. Bayramian, Erhard Gaul, D. Kim, Andrew Lintern, Jack A. Naylon, C. Malato, Bedřich Himmel, Dave Hidinger, Lukáš Indra, Bedřich Rus, G. Kalinchenko, Constantin Haefner, Michael E Donovan, Praveen Kumar Velpula
Publikováno v:
SPIE Proceedings.
Overview of progress in construction and testing of the laser systems of ELI-Beamlines, accomplished since 2015, is presented. Good progress has been achieved in construction of all four lasers based largely on the technology of diode-pumped solid st