Velpula Praveen Kumar
Velpula Praveen Kumar
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Single-shot high aspect ratio bulk nanostructuring of fused silica using chirp-controlled ultrafast laser Bessel beams
M Bhuyan, PK Velpula, JP Colombier, T Olivier, N Faure, R Stoian
Applied Physics Letters 104 (2), 021107, 2014
Nonlinear optical properties of covalently linked graphene-metal porphyrin composite materials
MBM Krishna, VP Kumar, N Venkatramaiah, R Venkatesan, DN Rao
Applied Physics Letters 98, 081106, 2011
Ultrafast laser induced electronic and structural modifications in bulk fused silica
K Mishchik, C d'Amico, PK Velpula, C Mauclair, A Boukenter, Y Ouerdane, ...
Journal of Applied Physics 114 (13), 2013
Spatio‐temporal dynamics in nondiffractive Bessel ultrafast laser nanoscale volume structuring
PK Velpula, MK Bhuyan, F Courvoisier, H Zhang, JP Colombier, R Stoian
Laser & Photonics Reviews 10 (2), 230-244, 2016
Spatial and temporal laser pulse design for material processing on ultrafast scales
R Stoian, JP Colombier, C Mauclair, G Cheng, MK Bhuyan, PK Velpula, ...
Applied Physics A 114, 119-127, 2014
ELI-beamlines: progress in development of next generation short-pulse laser systems
B Rus, P Bakule, D Kramer, J Naylon, J Thoma, M Fibrich, JT Green, ...
Research Using Extreme Light: Entering New Frontiers with Petawatt-Class …, 2017
Femtosecond laser-induced damage characterization of multilayer dielectric coatings
PK Velpula, D Kramer, B Rus
Coatings 10 (6), 603, 2020
Ultrafast imaging of free carriers: controlled excitation with chirped ultrafast laser Bessel beams; Laser Applications in Microelectronic and Optoelectronic Manufacturing …
P Velpula
Proc. of SPIE, 896711-1, 2014
Mitigation of laser-induced contamination in vacuum in high-repetition-rate high-peak-power laser systems
Z Hubka, J Novák, I Majerová, JT Green, PK Velpula, R Boge, ...
Applied Optics 60 (3), 533-538, 2021
Ultrafast laser-induced refractive index changes in Ge15As15S70 chalcogenide glass
C D’Amico, C Caillaud, PK Velpula, MK Bhuyan, M Somayaji, ...
Optical Materials Express 6 (6), 1914-1928, 2016
3D nano-fabrication using controlled bessel-glass interaction in ultra-fast modes
MK Bhuyan, PK Velpula, M Somayaji, JP Colombier, R Stoian
Journal of Laser Micro Nanoengineering 12 (3), 274-280, 2017
Role of free carriers excited by ultrafast Bessel beams for submicron structuring applications
PK Velpula, MK Bhuyan, C Mauclair, JP Colombier, R Stoian
Optical Engineering 53 (7), 076108-076108, 2014
Large area ion beam sputtered dielectric ultrafast mirrors for petawatt laser beamlines
T Willemsen, U Chaulagain, I Havlíčková, S Borneis, W Ebert, H Ehlers, ...
Optics Express 30 (4), 6129-6141, 2022
Evolution of femtosecond laser damage in a hafnia–silica multi-layer dielectric coating
PK Velpula, M Ďurák, D Kramer, AR Meadows, M Vilémová, B Rus
Optics Letters 44 (21), 5342-5345, 2019
Comparison of different LIDT testing protocols for PW and multi-PW class high-reflectivity coatings
M Ďurák, D Kramer, PK Velpula, AR Meadows, J Cupal, B Rus
Laser-Induced Damage in Optical Materials 2016 10014, 70-82, 2016
Multiscale electronic and thermomechanical dynamics in ultrafast nanoscale laser structuring of bulk fused silica
M Somayaji, MK Bhuyan, F Bourquard, PK Velpula, C D’amico, ...
Scientific Reports 10 (1), 15152, 2020
Laser-induced damage threshold tests of ultrafast multilayer dielectric coatings in various environmental conditions relevant for operation of ELI beamlines laser systems
M Ďurák, PK Velpula, D Kramer, J Cupal, T Medřík, J Hřebíček, ...
Optical Engineering 56 (1), 011024-011024, 2017
Spectroscopic investigations of femtosecond laser irradiated polystyrene and fabrication of microstructures
KLN Deepak, R Kuladeep, VP Kumar, SV Rao, DN Rao
Optics Communications, 2011
Post-compression of 8.6 mJ ps-pulses from an Yb: YAG Innoslab amplifier using a compact multi-pass cell
S Rajhans, PK Velpula, E Escoto, R Shalloo, B Farace, K Põder, ...
Advanced Solid State Lasers, AW2A. 6, 2021
Post-compression of multi-millijoule picosecond pulses to few-cycles approaching the terawatt regime
S Rajhans, E Escoto, N Khodakovskiy, PK Velpula, B Farace, ...
Optics Letters 48 (18), 4753-4756, 2023
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